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MAINTENANCE SERVICE MANUAL FT-IOI SERIES

1. VR VARIABLE RESISTOR _FET 2SK19GR 1 TR 11R LES DIODE H CAPACITOR 1 Ge 151007 DIPPED MICA 50WV 6 Si 151555 5 wv 12 Zener 110 1 R 3 CERAMIC DISC 2 1 FILM _ 2 4 7 10 12 16 23 6 18 22 28 19 ELECTROLYTIC 20 L 75 77 AW HW AW AW 4W 10 w TRANSISTOR 1 18 21 26 4W 1 sz TF 6 7 CARBON COMPOSITION 4W 2 D DIODE VR 1 Si 151555 1 50 QB 500 2B R RESISTOR CARBON FILM 1 24 PEI 50WV 100PF 15 22 50WV 150PF 11 17 50WV 470PF 26 28 CERAMIC DISC 50WV 9 0014F 2 6 9 10 12 13 18 20 0 01 21 23 31 34 9 7 8 14 16 19 35 50WV 0 0472 F 28 PLASTIC FILM 50WV 0 47 30 ELECTROLYTIC 16WV 104F 4W INDUCTOR SS 1 4 RF_CHOKE 2504H CAPACITOR 7 E DIPPED MIBA 50 20PF TRANSFORMER amp INDUCTOR 50WV 40 108 IF TRANSFORMER 50WV 150PF 109 _IF_TRANSFORMER DETECTOR 50WV 470PF CERAMIC DISC 50WV 0 00 F CRYSTAL FILTER 101 E EE EX PARTS
2. 53 i Qu 4 FIX 8 RF PROCES 932SkI9GR PB ISIAREGB CALIB UNIT Di D3 15555 TO TRAP QL 2SC372Y IOOKHz OSC v2 V3 PA 6JS6Cx2 5 MJ U 66 PB IIBIB RF UNIT a 2SC784R TRANS 2nd MIX y zin GAH ce A PIE WT we oy RT 635 7 92 zskleGR T iei i EU Ten 7277525 SOP MAK reas 4206 742 ammo 5A 25KHzMULTI 02 MFC6020 Z lt QL 2SC372Y 03 2SC735Y OSC BUFF TESTES SOP MAL FER 420P Max 742 Dano SA 00 7 d m em PB IO83 TI04 TIO TINY contar i
3. INIT 0 8 855 uo Mors 0 5 a nau O IN 2861 LINN 6 01 Nid Woda 9 M3NNV18 3510 0816 Nolivingog d oo pus a OL 15913 104110 2 90209 025 wax IW 11130 335 1811 84 LINN dH 1 2 Jndlno 110 WO Jndlno 1 4 2910209 0296 SSydqNV9 3XIN 158134 TIAS SL NL 22 9 Tndino YIKIN YIXIW LINX QNOO3S OL FINGON A1dans NOLLNGIYLSIO OL 53 WON JOA 6751 WYYOVIG 39018 TVNOI 19 34 lt 801 0811 99 33XIW HIGH FREQUENCY IF MIX UNIT PB 1180 A Z Q2 3SK40M 2SC372Y RX 2nd MIX TX ist MIX Viewed From Solder Side Jojloedeo jdop e pue 34001 e jo uo 4eu quoo e s 8 9 404 2ede5 0811 44 LINN XIW 4I 19 3 3 34 5 10 020 91 AMM 026 6 001 0207 66 201 0267 v 80l 0207 v VOI 02075 11 02042 61 02002 02 020 1 0v 02S 6 08 ZHN 02671 091 51 1 071 804 SIVLX 9 SYJWWIYL HOLIMS LINSNVHL Se 3413934 4 2 1 1 02 5 91 1 18 OL 1102819 19313538 40 Luvd 2011 0174 11 219952 111950 1v901 OL 515252 33401104 Y
4. w oi else m 34 39110 3910 X3J 33 3 10 13 d L01 14 4 17 FT 101 B amp FT 101 E7EE EX RESISTANCE CHART VALUES ARE IN OHMS 4 18 VACUUM TUBE VFO Unit E 5 c OD B amp TrT R T R T T T nuu 814 1 _ 1 4 i yv per GAA 0 ud i UE 6 Je 14 1 1 2 3 4 5 6 8 9 10 AP AC R E E es 29 E 1 t T T Ej s E AS 20 E exl 3 I s o 1 E 6 10 o E AC V 2 1 Ac p gt 12 6 0 03 160 50 160 0 03 50 160 6 3 570 I i G E E E 10 E 69 1 1 T AS 003 160 High Frequency RF Unit PB 1181B NB Unit PB 1582 E C D B F S C D B G R R 1
5. XF 32A SSB RESISTOR 2 XF 30C CW OPTION CARBON FILM 4W_ 1 3 _ Aw 19 Hw PRINTED CIRCUIT BOARD PBI315 A 21 30 Q IC TRANSISTOR 9 11 14 24 28 2 3 2SC372Y u 20 6 7 TR 2SC373 6 8 3 9 TR 2SCIO00GR 12 15 16 22 25 26 29 u 1 FET 2SK19GR 32 2 5 FET 25 9 33 8 IC AN214 13 17 23 27_ 4 IC 7042 7 4 100KQ D DIODE 12 34 151555 VR VARIABLE RESISTOR L5 WZ 090 1 TRIIR 50098 x 2 TRIR 5 R RESISTOR c CAPACITOR ES 13 14CARBON FILM 4W 1000 20 28 30 DIPPED MICA 50WV 53 Aw 1200 19 27 32 5 40PF 41 4W 2200 38 50WV 12 4W 3300 37 50 82PF 16 17 33 AW 5 10 45 4W 4 i 50WV 150PF 27 4W 21 50WV 300PF 5 8 15 45 49 4W 23 50WV 820PF 21 _ 4W 36 50WTV 20 28 34 4W 31 CERAMIC DISC SOWV_ 6 4W 2 8 9 13 17 18 24 50 1 3 14 29 31 38 39 404 26 29 33 4 48 YW 6 11 22 25 34 50WV 9 10 35 4W 12 PLASTIC FILM 50WV 51 15 ELECTROLYTIC 16WV_ 11 18 i 20PF 50PF RF CHOKE 104H lt lt RF CHOKE 22 E 2504H 5 6 THERMISTOR SDT250 VR VARIABLE RESISTOR 3 4 1 5 2 L E CAPACITOR 46 DIPPED MICA 50WV 100PF 15 27 51 52 MYLAR 50WV 0 0014F PRINTED CIRCUIT BOARD PB 13M A Z 47 50WV TRANSISTOR 1 9 12 17 22 33 34 SoWV 0 01uF 1 3 TR U 24 28 29 30 5
6. 5 100P 10 108 COIL 1 6 5 SOP 10 2 109 VR POTENTIOMETER x 8 9 10 12 14 15 16 CERAMIC DISC 190 BALANCE VIOIKR 5000 SM ADJ VIOIKR 5000 SOWV O01 0 047 NB VIOIKR R RESISTOR XF CRYSTAL FILTER SOWV 16 17 JAWoriZWIO0KQ 1027 2 4KHz XF 30A SOWV 34 Wori4W22KQ 10 30 34 Wori W3302 10 C CAPACITOR Worl2WI SKQ 10 34 W2 2K9 10 35 MYLAR SOWV _ 0 475 20 W470Q 10 34 Works WISKO 10 3 30 31 DIPPED MICA 5 100P 10 34 Works 2209 10 6 17 23 5 470 10 34 Works W3 3KQ 10 21 28 5 15 10 34 Works W1002 10 39 5 SP 10 MW 5609 10 Words W68K9 10 36 42 ELECTROLYTIC 16WV 10 No 2 MIXER UNIT L 41 16W Vv 1004 PRINTED CIRCUIT BOARD PB 1082B PRINTED CIRCUIT BOARD PB i084C 7 13 25 45 14 20 22 CERAMIC DISC 5 0 047 2 Q FET amp TRANSISTOR 32 33 34 Sow v 0 001 3SK39Q 2 25 372 TC TRIMMER CAPACITOR 4 5 8 9 10 11 12 15 16 18 19 24 26 27 29 37 38 40 43 44 46 47 50WY 0 014 1 2 3 1ZWSOP MAX R RESISTOR L INDUCTOR
7. ONIS WIS Sy WOLLOS 401 3015 SM3HOS Z OML TANVd YANNI 3 TANVd LNO H pabse jug 112490 9 2 52510 194 zious 495 8 355 Id NIVW MCN PILOT LIGHT REPLACEMENT As often pointed out the pilot light replacement in an FT 101 is not a simple two minute job but then it is not the major effort that some would have you believe it to be either First get the right bulb s The FT 101 uses 1 14V 40ma wire lead type for the triangle light 3 16V 150ma bayonet type bulbs Two of the lamps are a breeze just plug them in and away you go The third 16V bayonet bulb however is really an RF fuse and it s located on the rear panel More than one inquiry has come in asking where does the other light go Installing the wire lead 14V lamp is a bit more complicated but look at Fig 3 5 and it should become clear as to what to do Remove the main tuning knob and the two screws holding the plastic es cutchion in place tug out the old bulb press in the new and route the wires as shown your unit used tape to hold the bulb in place you can use Scotch masking tape as a replacement however don t glue 1 into place or it will bond so firmly to the plastic that replacement will become impossible Use the tape or block whichever was supplied PCBA REMOVAL REPLACEMENT CAUTION The boards are not keyed and it is possible to
8. Viva 43 05 2SC784R RET I zal 371 4 28 10758 EH mi P ax 25 120 41 d 2 6 7 Ap Baer EM Advanced Communications Equipment from the World s Leader in Amateur Communications and Total Spectrum Coverage from 160 thru 2 Meters FT 101E TRANSCEIVER FL 21008 FV 1018 SP 101PB FTV 250 FTV 6508 LINEAR AMPLIFIER EXTERNAL VFO PHONE PATCH SPKR 2 M TRANSVERTER 6 M TRANSVERTER There are many reasons for you to choose Yaesu and they are best summed up as PERFORMANCE AT RIGHT COST Your dealer will proudly demonstrate lt why the finest sounding signals heard around the world originate from YAESU YD 844 QTR 24 Dynamic Mike World Clock v7 YAESU 4 The radio YAESU E3150900 901V HS KAXLs BAMA This manual is provided FREE OF CHARGE from the BoatAnchor Manual Archive as a service to the Boatanchor community It was uploaded by someone who wanted to help you repair and maintain your equipment If you paid anyone other than BAMA for this manual you paid someone who is making a profit from the free labor of others without asking their permission You may pass on copies of this manual to anyone who needs it But do it without charge Thousands of files are available without charge
9. 288 lli 184 amp 38 Q2 2SC372Y 2SCB28P dx 9 94 06 25 373 2 gt LEE sie ser N 21 42 46 3 e 2SKISY Q5 RELAY CONT 09 52 E 5 2 04 151555 04 VOX TA 7042M 2 2SKI9GR BUFF MJ 5 ade 8 PB 184A MOD BOSC UNIT j 04 250828 Burr 2 06 jr lp NB UNT MIU Q2 2SKI9GR 01 2SC372Y 2 ey 1122 FEE 15 884 an ROS 0 c E 1 mom see s 2 g 5 FI t d ui 8 5 TT 3 2 0 S AES we 9 55 S ie 5 A 818 z H 1 PE NT s te E ia 6 H w gt 8 a9 2 4 25 Ey LS ioe 0
10. 5 g 8 UNIT ban 5 27 DU 15 007 R36 KEF UNITI MATO 2 2SKI9GR 01 25 372 olos ML seer asl SIT 5 O pss 347 B 582B NB UNIT BOSC UNIT 328P BUFF RF TRI 88 ona a USIT 8 QI 2SC372Y PB 10828 MIXER UNIT D4 0555 547 REGBCALIB UNIT A022 Noor VS Auri AOU 7000 IA r Q I IF AE Da 2 99 14 s2 dd i ER PF TIZ eN o SA 1188 RF TRIMMI 8982252 50 PB a MESSY gu c240P __ 0P 50 res 4202 cma PF TENIS gp Tomas Yt amp 2540 44 PF T6342 GPF 0 5 po be
11. PB 1187A Viewed From Component Side TRIMMER B BOARD PB 1092 A Z 4 PB 1092 Viewed From Component Side ANTENNA TRAP BOARD PB 1116 A Z Viewed From Solder Side E Viewed From Component Side 5 37 Viewed From Solder Side CRYSTAL BOARD 1073 2 lt e 9 92701 89 1073 Viewed From Component Side Viewed From Solder Side RECTIFIER BOARD PB 1076B REC UNIT SEE Viewed From Solder Side 5 38 897 0l dd 331414534 TRAP BOARD PB 1109 A Z SERT eorr 8a PB 1109 Viewed From Component Side Viewed From Solder Side COIL BOARD A 1083 2 B 1083A Viewed From Solder Side Viewed From Component Side Viewed From Solder Side DIODE SWITCH BOARD 1186 2 SUB Viewed From Component Side Viewed From Solder Side 5 40 FINAL AMPLIFIER CAUTION HIGH VOLTAGE V 6JS6C Vi 6JS6C P Ka 5 41 MODIFICATIONS SECTION 6 CONTENTS PAGE INSTALLATION OF RF PROCESSOR TYPE B INTO EE EX 6 1 INSTALLATION OF RF PROCESSOR INTO LATE 101 ANDB 6 12 CW FILTER INSTALLATION eno eee 6 14 FT 101 SERIES ALL AM MODIFICATION 6 16 101 DC DC CONVERTE
12. 5 38 F RECTIFIER BOARD PB10768 5 38 G PB10768 PARTS LOCATION gt lt 5 39 TRAP BOARD 1109 amp 5 40 1 COIL BOARD PB1083 o o e 5 40 J COIL BOARD E PBI166 lt 5 40 K DIODE SWITCH BOARD PB1186 5 40 MODIFICATIONS INSTALLATION OF RF PROCESSOR TYPE B INTO EE EX 6 1 INSTALLATION OF RF PROCESSOR INTO LATE 101 6 12 CW FILTER INSTALLATION e 6 14 FT 101 SERIES ALL AM MODIFICATION 5 0 216 101 DC DC CONVERTER INSTALLATION 6 17 HUM PROBLEMS IN EARLY FT 101 0 d oda o a 5520 HUM PROBLEMS 1N LATER FT 1018 E EE EX S Rom NOISE POP MODIFICATION lt ww 6 25 MODIFIED FAN HOOKUP 35 4 dU o 36 24 PB1582 NOISE BLANKER MODIFICATION 2 16 29 INSTALLATION FOR FT 101 FT 101B 2209 6 26 INSTALLATION FOR FT 101E EE EX 100V FAN 6 28 MODIFICATION FOR FSK OPERATION 6 29 POWER TRANSFORMER CONNECTIONS amp wo ox 650 MODIFICATION FOR NON STANDARD FREQUENCIES or w rei INDEX cont d CONTENTS PAGE ALIGNMENT WARNING AND CAUTION NOTICE EQUIPMENT REQUIRED us ALIGNMENT PROCEDURE Tx AND Rx TRAP COIL ALIGNMENT HETERODYNE CRYSTAL OSCILLATOR ALIGNMENT S METER ADJUSTMENT NOISE BLANKER ADJUSTMENT SIDETONE LEVEL ADJUSTMENT VOX ADJUSTMENT
13. W4 7KQ 10 15 16 22 25 26 29 3 4 W4 7KQ 10 33 35 Works W47KO 10 Wor W22KQ 10 28 Works WS 6KQ 10 W33KQ 10 8 15 10 gt 10 34 2 3 5 1025 10 11 14 24 28 4 Worl WIKQ 10 34 Works W22KQ 1022 13 17 23 27 34 Worig2W22KQ 10 10 32 37 38 39 1075 34 Works W1002 1025 MWorkg W1800 1022 K Works WISKO 10 34 Works W3302 10 3 4 Workg 1 5 10 Works W1002 10 NO 6 REG amp CALIB UNIT 17 30 4 Words 4700 10 PRINTED BOARD PB 1079A 34 Works W 820 10 Q TRANSISTOR 31 34 Works W2 2KQ 10 1 2 3 4 25 735 25 367 34 Works W1 SKO 10 5 2SC697B D 24 34W 3 3MQ 10 6 2SC372Y_ 2SC828P W6 8KQ 10 34 WorkgW33KQ 10 3 4 5 151941 2 15993 Works 2200 10 3 15334 34 Works W470KQ 10 X CRYSTAL Works W 470 10 HC I3U 100KHz L INDUCTOR 1 2 VR POTENTIOMETER MULTI VIOIKR B BIAS VI60KRZ IBIOKQ Wong W27KQ 1022 VIOIKR B IKQ W 5 6 2 10 1 2 3 VOLT 4 FREQ ADJ VIOIKR 5000 5 amp OSC UNIT TC TRIMMER PRINTED BOARD 10
14. ZHAGZ NI AO 6 65 Ll 1109315 831 4 9 01 A EHA OL 522 30 Luvd 8 440 MS Iuv1O OL LINN 38 Zl Gu sa ZHAGZ 40 291001 4 91 9101 84 ZIMGZ ZHNOOL NI 0 6 812719 ddns 65 331114 A0Z VLAGZI 04 5018 GINO Zo ZA 804 WEN 93 13 a svig 6149 3 331113 Adan LIND 5 43Nod 431 zr 4 7 3015 woud 32018 IVNOILONNS ZYSI 14 LINN pub 3 5 31 03 POWER REGULATOR UNIT PB 1547 8 wigs a 3 oD g on 5 5 5 m 8 o a i 5 1 gt ab Pas U 3 71 65 S iden 1 _ ddr M en ge 6 AGE 1 e t 5 wo ms 5 2 1 Brio gt 5 32 52 5 2 1 1 92 9 92 4 2 0 91 8 0 02 9 61 9 81 9 12 9 ZZ 0Z 1 91 9 61 3 1 3 42 2 5 0 8 u 0 6 3 6 3 1 0 1 5 2 3 9 4 Y Y 1 3 1 21 12 4 ZA 1 07 9 9 a 1 9 6 0 zi u 751 94 4041511534 YAMOd 5 55 90 303 SVIS 222 va SI 5 N3HM QN9 HOLIMS 77 S 35109 134 90 YIX IW 3510 134 1 9 arcs 6
15. clockwise until the relay activates then return the control carefully counter clockwise until relay releases This release point is the proper setting for the RELAY sensitivity control Set MIC GAIN control to the center of it s travel Speak into the microphone normally adjust VOX control VR1 to just activate VOX relay Tune in a signal and adjust the AF GAIN control to a comfortable list ening level Set the ANTITRIP control VR5 to the minimum point that will prevent the speaker output from tripping the VOX Adjust the DELAY control VR2 for suitable release time CW SIDETONE LEVEL ADJUSTMENT CW sidetone level may be adjusted by rotating the TONE level potenti ometer VR4 located on PB1315A CARRIER BALANCE The transceiver should be allowed to reach operating temperature be fore making carrier balance adjustments Tune up the transceiver for SSB operation using dummy load Turn the MIC GAIN contro fully counter clockwise to remove al audio from the modulator stage With the MODE switch set to either the LSB USB positions turn the switch to the MOX position and adjust the carrier balance controls VRI and on PB1184A for minimum PO meter reading A more precise balance may be obtained by tuning a receiver having an S meter to the transmitted frequency Adjust the balance controls for min imum S meter reading while switchihg the MODE switch back and forth between the two sideba
16. 000762 N S 41193 101 14 uolsJeA 101 14 APPROXIMATE BREAK IN POINTS PCBA CHANGES A review of factory records did not disclose the precise serial number break in points so the following data is the best that could be achieved from old records and should be used for guidance only PB 1160 was used to S N 023000 Fixed Osci lator 1182 began at S N 024000 1076 and PB 1076A were used to S N 021000 Rectifier Board 1076 was used beginning with S N 022000 The major change was adding more diodes and voltage equalization resistors PB 1077A from S N 508000 to 005000 RF Amplifier 1077B from S N 006000 to 023000 10778 modified S N 024000 only 1181 starts with S N 025001 PB 1078 used to S N 024000 OSC MOD Board 1078A used to S N 025000 1184 begins with S N 025001 PB 1080 and 1080A used in S N 508000 to 005000 IF Amplifier 1080 modified 006000 to 023000 1080A modified modified 024000 only 1185 begins with S N 025001 PB 1081 1081A 10818 and 1081C to 024000 Audio Unit STK 401 module first used with PB 1081C 1189 begins with S N 025001 PB 1084 and 1084A used S N 508000 to 005000 Mixer 10848 and 1084C 006000 to 025000 1084C modified 024000 only 1180 begins with S N 025001 PB 1229 begins at S N 028000 AF Preamp The 508000 serial number was used on some very old sets quantity unknown but not more than three thousand estimated BOARD LOCATIONS POWER TR
17. 5 2SCB2BP E 5 a bs a 5842 2 5 gam rd Qi 25 372 MJ 2 10828 MIXER UNIT pB4 1555 Di D3 f I p 4 Tart 1 pet ci yi s Pur EC Sol E rip ab T d 5 55 O 9 Eum a eg yt BE Sm aha Y om 99 x Go geht wd o La E o d A 41 9 EP ual m 024 gt LU d 8 5 3 cd ED sehe sell wot m OD w2 E i at e 5 m ran map rt 5 Live is cr c2 me MJ I UNIT exces AH TRANS 2nd MIX FX 1 iS Ferree gees Vos 4202 87 250uH Ten 720 7675 SOP MAK 420P MAX 25KHz MULTI Q2 MFC6020 93 2567357 BUFF
18. FEATURES Conservative 1200 watts PEP input on voltage change from 117 234 VAC Dual front uous monitoring of plate current and voltage 10 meters Easy primary panel meters provide contin FL 2100B SPECIFICATIONS Frequency Range 3 5 to 4 0 mHz 7 0 to 7 5 mHz 14 0 to 14 5 mHz 21 0 to 21 5 mHz and 28 0 to 29 9 mHz Plate Input Power 1200 watts on SSB 800 watts on CW at 50 duty cycle and 600 watts on AM and RTTY Drive Requirement 350 to 100 watts Input Impedance 50 ohm unbalanced Output Impedance Nominally 50 ohm unbalanced with not more than 2 1 SWR Distortion Products 30 dB at 1200 watts input Noise Level 40 dB below single tone carrier Circuitry A pair of 572B in ground grid circuit Power Requirement 100 110 117 VAC at 18 amps 200 220 234 VAC 50 60 Hz at 9 amps Size 340 W x 153 H x 285 D m m Weight 18 5 Kg FV 101B EXTERNAL VFO Fig 1 29 Match up the FV 1018 with your FT 101B E EE EX and open up a new world of operating flexibility DX rs will particularly appreciate this combina tion The FV 1018 features the same factory sealed solid state VFO with 1 kHz readout that is found in the FT 101E A dual adaptor is built in to the FT 101E EE EX to accept a simple plug in cable The FV 1018 in cludes a fixed channel oscillator for up to four crystal controlled channels on any band 160 through 10 meters SPECIFICATIONS Frequency Range 8 7 to 9 2 mHz
19. B PARTS LOCATION tes POWER REGULATOR UNIT PB1314 AJ 5 Scare Kies ch PARTS LOCATION It AUDIO UNIT PB1315 A FUNCTIONAL BLOCK DIAGRAM a UU SCHEMATIC a oy o veu PARTS LOCATION 2 s sarin 5 PAGE 4 1 4 2 4 7 4 7 4 11 4 12 4 13 4 14 4 15 4 16 4 17 4 18 4 19 5 1 5 2 5 5 5 6 5 7 5 8 5 9 5 10 5 11 5 12 5 15 5 14 5 15 5 16 4 4 5 18 5 19 5 20 5 21 5 22 5 25 5 24 5 25 5 26 INDEX cont d CONTENTS PAGE RF SPEECH PROCESSOR PB1494 AX JSCHEMATIG 43 ah yes ce GS S 15 27 B PARTS LOCATION 6 S 5 28 RF SPEECH PROCESSOR PB1534 A SGHEMATIG i4 pa pa SY 529 B PARTS LOCATION e os 4 25 50 REGULATOR AND CALIBRATOR UNIT PB1547 A FUNCTIONAL BLOCK DIAGRAM s 5 31 B SSCHEMATIC 09232 PARTS LOCATION uo Q s 853 NOISE BLANKER UNIT PB1582 A FUNCTIONAL BLOCK DIAGRAM 5 34 B SCHEMATIG 7 5 4 ww SSS PARTS E leoi 5 4 lt 5 56 MAIN CHASSIS UNITS RF TRIMMER BOARD PB1186 5 37 B TRIMMER BOARD A 1187 5 37 C TRIMMER BOARD B 1092 5 37 D ANTENNA TRAP BOARD PB1116 5 37 CRYSTAL BOARD 1075
20. Harness Wire 100 cm PREPARATION 1 Rotate two slot screws 90 degrees in CCW direction and remove the top cover 2 Remove two 3 mm nuts six self tapping screws and two Phillips screws remove the bottom cover Remove four self tapping screws on the bottom side two Phillips screws on both sides and three Phillips screws on the top side of the cabinet Slide the chassis and panel assembly from the cabinet Remove three Phillips screws as shown by marks in Fig 6 1 Lift up the speaker boards and disconnect the speaker leads by unsoldering them Fig 6 1 INSTALLATION For units bearing serial numbers preceding 150000 the transceiver should be modified as fol lows UNDER THE CHASSIS 3 2 Disconnect the two white yellow wires from Pin 11 of MJ 5 Connect and solder Pin 11 to pin 7 of MJ 5 with a 2 5 mm length of black colored wire Prepare the 45 cm length of white yellow wire h supplied with the kit Solder one end of this wire together with two white yellow wires removed from Pin 11 by Step 1 Insulate the soldered point with 1 5 cm length of the 5 mm yellow tube Disconnect the white wire from Pin 14 of MJ 5 and solder it to one end of the 40 cm length of white wire supplied Insulate the soldered point with 1 5 cm length of the 5 mm yellow tube Remove a wire between Pin 10 of MJ 3 and terminal board at the side of MJ 3 See Fig 6 9 6 2 Insulate the leads of 10K ohm resistor
21. INPUT IMPEDANCE 30 to 50 INPUT IMPEDANCE 500 to 1500 INPUT IMPEDANCE 20K to 500K OUTPUT IMPEDANCE 300K to 500K OUTPUT IMPEDANCE 30K to 50K OUTPUT IMPEDANCE 50 to 1K VOLTAGE GAIN 500 to 1500 VOLTAGE GAIN 300 to 1000 VOLTAGE GAIN 1 CURRENT GAIN 1 CURRENT GAIN 25 to 50 CURRENT GAIN 25 to 50 POWER GAIN 20 to 30dB POWER GAIN 25 to 4048 POWER GAIN 10 to 2048 TRANSISTOR AMPLIFIER CHARACTERISTICS BASIC TRANSISTOR OPERATION is 1 27 TRANSISTOR BIASING CONDUCT ING TYPE CUT OFF B 8 MAIN CURRENT B B lt CONTROL CURRENT PNP i Bt Bt i CONTROL MAIN CURRENT CN CURRENT RECOMMENDED ACCESSORIES varsu FL 21008 LINEAR AMPLIFIER Fig 1 28 The FL 21008 is a conservatively rated matching amplif FT 101 series This amplifier features two rugged 572B carbon plate tubes in a class B grounded grid circuit with individually tuned input coils for each band The FL 21008 operates on 80 through 10 meters with dual cooling fan and a solid state power supply with an effective 28 uF filter system providing reserve ratings and linear operation Dual interlocks offer safe ty and shock protection An automatic changeover circuit biases the tubes to cut off on receive to maximize tube life and minimize heat Bifilar wound ferrite filament chokes guarantee minimum RF transfer to the power source The 21008 offers maximum performance in one compact ier for the
22. The meter circuit is wired to indicate signal strength when receiving and on transmit the meter may be switch selected to indicate cathode cur rent relative power output or automatic level contro ALC The meter functions are automatically switched by means of relay contacts between trans mit and receive modes ALC meter readings are controlled by variations in grid current flowing in the final amplifier tubes 1f the final amplifier is overdriven due to modulation a portion of the grid current flow is then rectified and applied to the sink of Q1 2SK19 on 1184 The meter then indicates the current flowing in the 25 19 which is in turn representative of the ALC control vol tage arriving at pin 14 of PB1184A from the low end of 112 In the IC position the meter is connected to the cathodes of the final tubes in parallel with shunt resistor R12 and is measuring the total cathode current of the tubes In the PO position the relative power output is indicated by the rect ified DC current at the pi output circuit The meter sensitivity is adjusted by potentiometer VR6 located on the rear panel When the transceiver is in the receive mode the AGC voltage developed by the received signal is fed to the meter amplifiers Q4 and Q5 located on PB1183B pin 2 to provide a meter deflection proportional to input signal strength The meter is calibrated in the customary S units meter in dication of S 9 represents approximately
23. 1f you encounter this problem it is a fairly straight forward solution The drawings below illustrate the back of the board solder side and repre sent only the lower right hand one fourth of the board with the plug facing bottom of the page Using an artists knife or other suitable tool isolate the small section of ground plane as shown in the illustration Nothing additional should be done to this as it has a ground on the other side of the board Then clean up the solder connection which is indicated in the drawing Get it smoothed off so you can drill right through the board and remove this connection com pletely The front and back ground planes are connected at this point and the connection must be removed Drill right through the center of the con nection with about a number 36 drill 1 you have done it right and completely the hum should be gone when you check your work DRILL THROUGH Fig 6 21 6 20 HUM PROBLEMS IN LATER FT 101B E EE EX The most common cause of hum is rosin the contacts of the 1515 audio board If cleaning the contacts with alcohol does not resolve the Problem a second source of hum may be in pickup from the pilot lamp cir cult The cure is fairly simple but you will have tc modify this circuit so remove the top and bottom covers 1 Locate the two brown wires connected to the center pilot light and clip the cne brown wire going down towar
24. AoN3nO3343 5 13 L 1u0 9419994 325 1 5 9 914 81184 300N 91 9 250 pue OW 18 Jelel S 01 4 deN S 3 109109 NIVI TVI 3 WO g 1 1 1 yO NIV9 29 6 181184 HUN 4 a e npoy 325 YOLINS NIN9 99V JOON Gl ps Se 2046761 8 7 ONS OZS YO4INS 300 01 14 amne 494114 1 4 2910816 Lr 494114 100 al NV GSS Zbv Z yssiad HUN 985 981184 PIA 21 4055099044 uoeeds 424185 6 81184 250 1 402701 230816 855 mo ass pue GOW 850 151 OL 20 10 uld GL Z8S18d4 294114 124X ZHM 6Ll amp T A S 1 ZHY NS 491113 ZH 009 26 BU XC bribe he 41 1euol do 005 3 gt ejnpou Aqddns 4nouBnoJuj uo 4nq 445 P 61L Jewod 90A G EL WV39V1G 39018 TVNOILOND3 581 94 31 LOW FREQUENCY IF UNIT PB 1183 A Z 94 25 8280 03 CA3053 Q2 25C784R QI 2SKI9GR AGCB S METER F IF o o o S e 1 Signe iever 2 H PB 1183C P AAE L jw Ul 11 Viewed From Component Side Viewed From Solder Side 18001400 s 2
25. CARRIER BALANCE NULLING ALC LEVEL ADJUSTMENT RF PROCESSOR gt x BIAS ADJUSTMENT 5 SUP Qa enean a D FINAL AMPLIFIER NEUTRALIZATION 7 7 11 POWER OUTPUT PO ADJUSTMENT 7 12 BAND PASS FILTER ADJUSTMENT 9 TAT PARTS LISTS amp ORDERING DATA RARTS ORDERING PATA 5232 0 PARTS AEISTETAIOT iiu xe oae 2 A 8 3 PARTS LIST FT910 B 4 M wow 5 9 7 PARTS LIST FT 101E EE EX 2 4 s 8 12 SCHEMATIC DIAGRAMS SECTION 9 CONTENTS INTRODUCTION SECTION A BRIEF HISTORY OF THE FT 101 INSTALLATION NOTES NORMAL TUNE UP ABBREVIATED TEST SETUP FOR SERVICING CRYSTAL INFORMATION SOLDERING DESOLDERING TECHNIQUE ON CIRCUIT TRACE REPAIR PARTS IDENTIFICATION THEORY OF OPERATION PLUG IN MODULE CIRCUITS RECOMMENDED ACCESSORIES OPTIONAL ACCESSORIES 1 PAGE 1 0 1 1 meet A BRIEF HISTORY OF THE FABULOUS FT 101 THE RADIO The FT 101 series of transceivers appeared initially in the USA in small numbers in late 1971 and gained almost overnight approval of amateur radio operators for their quality of signal flexibility of op eration and the professional attention given to workmanship and design Early FT 101 s serial numbers 25 000 and below were produced to the following specifications FREQUENCY RANGE TYPE OF EMISSION POWER INPUT CARRIER S
26. IOOKHz OSC HEATER 3 PB IIBB RF TRIMMER VEL APA A022 4 WS 4277 ADH 14 FEN Teas 50 Te rex 12577A MAX jazopewhx 5 TAZ Malo 220 d ud fW lt He o ja tm 2 tall 9244 aro Avas was T 9 42 000 002 A009 An MJ 4 02 1315 AF UNIT E Q4 VOX 24 arc z 3 E xo RS 59 59 ps 9 ag 9 RO are 8 Doo Bo 4 588 Lb 100 19 nman G aie ves 4299 3 552 gt 2 8 Oro 151555 osc _ 9ezesi 1a L TORS ARE IN Al L RESIS RWISE NOTED OTHE ARE IN u CAPACIT 2 ALL OTHRWISE NOTED 3 ALL ELECTROLYTIC UNLESS iewv UNLESS OTHRWISE NOT ARE 15 4 X VALUE RAM 5 u CIRCU 2 9 63 49 E gt
27. ITE BLUE Begin by soldering one coax center conductor to the IN terminal of PB1494 and its braid to E Locate the green coax coming from the select switch S 4 and solder it to the fix terminal shield to the adjacent E point You may have to tug the wire up a bit from the bundle but it will reach okay Route the free end of your first coax along the board edge then down through the space between chassis opening and panel along the wiring har ness to MJ 3 IF unit socket solder the center conductor to pin 10 of MJ 3 and the shield to pin 13 So der the second piece of new coax to the board center conductor to out shield to E Dress the free end parallel to the other new coax and terminate it on the lug type terminal center conductor to lug 5 of the terminal strip just below MJ 3 socket and parallel to it as shown in Fig 6 14 This is the junction of R19 R20 and D8 if you need more orientation REMOVE YELLOW WHITE WIRE 6 12 MOUNT STRIP HERE FIG 6 15 6 13 Now locate pin 9 of MJ 6 You will see a wire extends and connects to a three lug terminal strip where a diode is terminated Solder the 151555 diode s cathode banded end to where the wire extension to the terminal strip is made The anode of the diode is connected to the new terminal strip Connect the free end of your hookup wire that you attached to the OFF lug at the beginning of this exercize and solder it to the lug the
28. NO ALC INDICATION With the transmitter loaded and the mode switch in the SSB position key the mike and advance the mike gain control to the number three position Whistling into the mike measure the voltage at the anode of 02 This voltage should read 1 5 VDC on peaks indicating the ALC rectifier is work ing properly If zero volts is measured at this point the following checks should be made Disconnect the white wire at the junction of R13 C18 and D2 and measure the voltage again while whistling into the mike 1f the voltage is still zero then one or more of the components in the ALC rectifier circuit is bad C17 D2 D3 C18 or R13 If the voltage is normal with the white wire disconnected this indi cates a ground on the ALC output circuit Unless the wire connecting the components is being shorted to the chassis the only components that will cause this trouble are C32 and C6 which are located on the MOD and OSC board Replacement of the bad components should restore normal ALC indication the proper voltage is read at the anode of D2 then this voltage must be traced over to the gate of 01 to locate the open component or cir cuit such as L12 or R4 LOW OR NO TRANSMITTER OUTPUT f transmitter power output is zero in the SSB mode and normal in the TUNE mode it is possible that the unit has an ALC trouble With the transmitter loaded in the TUNE position switch to the SSB mode and ground the anode of D2 ALC r
29. 0 10 10 MAIN CHASSIS L INDUCTOR PRINTED BOARD PB 10758 OSC COIL PRINTED BOARD 1092 3 4 6 7 PRINTED BOARD PB 1086 REC PRINTED BOARD PB 1073A VC VARIABLE CAPACITOR PRINTED BOARD PB 1074A PRINTED BOARD PB 1083A TC TRIMMER PRINTED BOARD 1107 PRINTED BOARD PB 1109 170 10Px23 PRINTED BOARD 1116 C CAPACITOR V VACUUM TUBE DIPPED MICA 12BY7A SOOWV 650 10 6156 500WVYV 100P 10 D DIODE SOOWV 2000P 107 3 151941 500WV 30P 107 8 10 13 181007 CERAMIC NPO 15334 500 10 Q TRANSISTOR SOOWV 6P 500WV M METER CERAMIC UJ 45 500 500 20P S SWITCH 500W 7P BAND 12 12 11 500 26 _ MODE E365R20Z 3 CERAMIC DISC SLIDE SS F 22 08 SOOWV _ 001 SELECT ESR E246R20Z 7 9 11 15 SOWV 9 01 HEATER WD 3201 R RESISTOR POWER WD 3001 3 WorlgW10KQ 10 9 SLIDE 55 23 08 34 Works W100KQ 1077 RL RELAY 34 Works W3302 105 NK 6 AE3171 34 Works W1000 102 MX 2 Works WS 2KO 2107 X CRYSTAL SOM 7250 9 520 40M HC 25U 13 020MHz 0 1 20M
30. 5 11 B SCHEMATIC lt s 5 12 C PARTS LOCATION lt ex lt 5 13 LOW FREQUENCY IF UNIT PB1183 A FUNCTIONAL BLOCK DIAGRAM 5 14 SCHEMATIC e op o gt 5515 C PARTS LOCATION lt 6 5 16 MODULATOR UNIT PB1184 A FUNCTIONAL BLOCK DIAGRAM 5 17 BY SCHEMATIC gt e lt ecs s lt 5 18 C PARTS LOCATION a si 2 w lt lt 5 19 NOISE BLANKER PB1292 A SCHEMATIC a 3 lt 2 5 20 B PARTS LOCATION 2 2 4 2 BZ POWER REGULATOR UNIT PB1314 A SCHEMATIC se e re 5 22 B PARTS LOCATION c lt lt s o 5 23 CONTENTS AUDIO UNIT PB1315 A C FUNCTIONAL BLOCK DIAGRAM SCHEMAT IG Q PARTS LOCATION RF SPEECH PROCESSOR PB1494 A B SCHEMATIC 5 p s PARTS LOCATION RF SPEECH PROCESSOR PB1534 A B REGULATOR AND A B C NOISE BLANKER A B C SCHEMATIC PARTS LOCATION CALIBRATOR UNIT PB1547 FUNCTIONAL BLOCK DIAGRAM SCHEMATIC pane Q 9 PARTS LOCATION UNIT PB1582 FUNCTIONAL BLOCK DIAGRAM SCHEMATIC PARTS LOCATION MAIN CHASSIS UNITS A 8 C D E H 1 J K RF TRIMMER BOARD PB1188 TRIMMER BOARD A PB1187 TRIMMER BOARD B PB1092 ANTENNA TRAP BOARD PB1116 CRYSTAL BOARD PB1075 RECTIFIER BOARD 107
31. Sometimes after the designers and draftsmen have finished the art work and tape up a board is made with an error in it This is being charitable managers have been known to faint dead away when first formed of this kind of development Thus etch cuts and jumpers at the factory level usually represent the fine tuning of a design and they are best left in place unless you enjoy improving the design engineers effort In that case you should know how to cut a trace professionally Like this Square ec Fig 1 7 Coat Cut Area With Eastman 910 GATE NO 2 o GATE SOURCE SUBSTRATE AND CASE SOURCE INSULATED GATE BULK SUBSTRATE AND CASE PINS PIN 2 4 LT PINS 8 PING PINT sase EMTTER COLLECTOR LEAD 15 CUT AT 45 ANGLE NOTE ORAIN EMITTER f SOURCE GATE COLLECTOR EMITTER COLLECTOR COLLECTOR THEORY OF OPERATION PLUG IN MODULES The transceiver is designed with computer type plug in modules These modules are high frequency unit high frequency IF unit low frequency IF unit audio unit modulator unit noise blanker unit and power regulator unit See Fig 1 9 The VFO unit the crystal oscilla tor unit and rectifier unit are built Into the main chassis but are on PCBA boards PB 11818 1077 Fig 1 10 HIGH FREQUENCY UNIT 1181 This module contains the receiver RF amplifier receiver 1st mixer transmitter 2nd mixer and
32. amp FAULT TREE 47 2 e ope a FT 101 CHASSIS VOLTAGE CHART FT 101 CHASSIS RESISTANCE CHART FT 101B E EE EX CHASSIS VOLTAGE CHART FT 101B E EE EX CHASS S RESISTANCE CHART BOARD AND TUBE VOLTAGES 4 7 4 7 4 11 FAULT IDENTIFICATION AND LOCALIZATION The process of troubleshooting any electronic equipment is highly in dividualistic however it is essentially a process of logical elimination Begin with 8 visual inspection for broken discolored or charred com ponents Smell the unit Transformers smell differently than resistors etc Check for loose modules or tubes Set up the unit as shown in Fig4 13 and be sure to use dummyload Do not troubleshoot using an antenna Initially turn on the receiver only and check out the entire Rx side of the transceiver Repair anything you detect as a malfunction in the re ceiver before attempting to repair or key up the transmitter side Since much most of the circuitry is used for both Tx and Rx you may clear a Tx fault at the same time you are repairing the Rx malfunction The technique to follow when trying to identify a fault is to first localize it to a function Rx inoperative on LSB then to a board MOD and OSC unit a circuit LSB oscillator then a component 2SC372Y If you get lost back up and begin again using the data given in this manual to help you Naturally if the Rx is normal move
33. amp INDUCTOR I IF TRASFORMER TRAP X CRYSTAL Ti HC 18 U 6360K Hz VR VARIABLE RESISTOR 1 TR IIR SKQB C CAPACITOR 00 DIPPED MICA PRINTED CIRCUIT BOARD PB II83MA Z SOWV 6PF 0 5PF Q FET IC amp TRANSISTOR S0WV 50 10 2 TR 2SC784R SOWV 100 gt 10 4 5 TR 2SCS28Q CERAMIC DISC 3 IC CA3053 SOWV 0 001 uF 1 FET 2SKI9GR 10 12 16 SOWV 0 01 uF SC _ D OiODE ELECTROLYTIC Ge 1S1007 16W 47 Si 1S1555 Zener W2Z 110 R RESISTOR CARBON FILM 2 13 16 yw PRINTED CIRCUIT BOARD PB I082 A Z 23 AW 4 32 PB 1180 A 2 20 Q FET TRANSISTOR 12 15 x TR 25 372 3 14 uw _ FET 35 40 22 AW DIODE 3 NW E Si 151555 1 R RESISTOR CARBON FILM 17 24 Mw 10 w w 100 KQ 10 CARBON COMPOSITION 16 17 _ 26 _ MW 1 MQ 102 a 6 7 100 Q 10 15 _ 4 1 VR VARIABLE RESISTOR 1 TRI2R S009B 2 TRIIR 5000 C CAPACITOR _ 3 x 3 DIPPED MICA 1 24 25 SOWV 100PF 100 FT 101 PARTS 15 22 e SOWV ISOPF 21072 ELECTROLYTIC 11 17 SOWV _ 470 10 5 6 7 10 14 21 16WV 1 uF CERAMIC DISC EUR 16WV 2 2uF SOWV 001 gt 26 2 16 19 20 31 36 16WV__ 10 SOWV 0 01 uF 7 52 8 35 16 22 iS 40 16WV 33 uF
34. from BAMA Visit us at http bama sbc edu
35. ol O lt 210 lt 06 a ST ot 99 901011 l SI SI 3 3 gel 3 0 8 s 20 E 3 99 06 3 Ovi osl 09 O9 20 40 66 102 3 e halle o Se rere ait t 3 o 3 3 3 zwi 3 e 621 oi 3 3 3 621 ogi j GI us eli Ot 621 0 LYVHD 39 1 0 101 14 39V110A 4 15 FT 101 RESISTANCE CHART 0 Oo m d m O m jo mm x m o m 8 o 2 3 4 5 6 7 8 9 1 m m o o m 1 im o o VALUES ARE OHMS 4 16 ifldM OW HXI AB 031 H3MOd indino MOOT 3200084 01 613437 TYN9IS JY 1 NWn109 3 H3ONN N3N9 S3nvA 65 2000 4 OL 613431 3 39 INOS FY 53 SWH 5 N LIND ANY 1 530 JINSNYHL 353038 8 7802 ONY9 BSh 300W JSNYaHL 1 3A3938 8 a SLIOA N 53 3 2 e jo o o u u o o olo s o o jujc T 52 09 oer SE 1 w oj w
36. 0 3510 7 6 ZHAGZLZ 80 JOVI TOA 1081809 NIWS HOLINS 1 E 1051800 3199 HOLIMS 300 ONV 6 914 1081409 33 NOdd 3 1 0 8 811 98 LINN 41 HAOB LS ZHAOBIE eating as vue OL 2HNOG IS 31 puz i 9 20 94 2 2zH40815 WOU tndN1 jl Adds FINGOW 1 NOILNGIYLSIG OL amp W3MOd Nodj GEI NVUIVIG 9018 TVNOILONnd 0861 44 18 ASION NOISE BLANKER UNIT 1582 2 PB 1582 Viewed From Component Side Viewed From Solder Side 5 35 Jokloedeo 1 3 1 9 21 0 ou s ededl 3lON 21 9 61 3 vi u 01 9 5 0 2 9 8 1 0 1 21 11 0 1 0 0 Ta gt 62 QUA 5 91 9 ty Ws 8 9 el 9 0 y 61 9 121 1 02 3 cw 14 2 2 1 20 75 lo o z a 81 0 0 o 1 9 61 2 5 02 9 gt 5 0 5 6 2 81 4 5 9 99 oll 224 1 62 Q NQ 6 4 8 2 62 0 2 0 91 8 22 0 6 0 1 91 t 9 zzi E 12 9 PF 9 0 9 lt 2 1 1 92 4 2 2 3 4 0 8 y gz u 8 3 4 ASION 5 36 CHASSIS RF TRIMMER BOARD PB 1188 A Z 881 83 1188 Viewed From Component Side TRIMMER A BOARD 1187 2 Viewed From Solder Side
37. 1 510 0 PROCESS 1 35 13512515 0 o Q 1 35 1 35 12 5 0 5 0 0 T i c I T Q 6 E E n H 05 0 5 srvox 23 as 1515 0 0 OFF Q 4 Q7 0 a 8 0 4 0 4 MODECW 2 3 23 125 nal 0 6 0 6 ON Q 9 06 08 39 04 04 4 o o o 06 06 v OFF Qs 4 jojo o 06 06 1 1 2 8 5 6 7 12 0 12 5 125 s OFF F Q 57 4 52 175 175 1 8 na 0 o ON i q 57 E 95 55 55 392 ay ca Sul 14 Se 3 3 9 cda 1C PIN NO 8 9 1 m 12 Q 4 FT 35 07 6 82 5 1 Q 8 RT 105 11 5 15 11 5 12 5 9 5 ROCESS T ans 1 5 10 5 1 5 11 5 92 R 125 125 11 5 125 125 process Fig 4 12 T 2 05 22 n ON 4 20 BOARD LOCATIONS PARTS LOCATIONS SECTION 5 CONTENTS PAGE BOARD MODULE COMPLEMENT s s s sa x 5 1 BREAK IN POINTS OF PCBA CHANGES 4 5 2 BOARD LOCATIONS e 5 o 2 2 VFO UNIT P81056 A FUNCTIONAL BLOCK DIAGRAM 5 5 B lt SCHEMATIG Z 2225 22 2 oo 35 PARTS LOCATION 5 47 MIXER UNIT PB1180 1182 A FUNCTIONAL BLOCK DIAGRAM 5 8 B SCHEMATIC 2 2 x 2 5 8 C PARTS LOCATION s s lt 5 10 RF UNIT PB1181 A FUNCTIONAL BLOCK DIAGRAM
38. 10 B 2PY 100P MAX 2s Ww TOKO 1025 MAX 29 14W 370KQ 10 150 1 SKV 16 18 4W 4700 3 1072 VC VARIABLE CAPCITOR 20 23 34 31 32 33 34 1 W 56 10 PLATE RT 18B 300VC 22 WwW 3300 1020 LOADING B1340 DS 26 W 5600 10 VR POTENTIOMETER 35 W 6800 10 AF RF a 10 iw 560 10 GAIN ip IW 47KQ 1075 MIC GAIN m 12 M 1 SHUNT CARRIER vk AoOAF02339 5 3W SIKO 5 CLARIFIER ECVBOHSISAI4 37 sw 18 1022 VIOIKR 40 SW EVLS3AA00B53 44 Bw PO AD EVHBOASISBI3 W 33KQ 10 SP SPEAKER W 22KO 10 3 80 EW IMO 107 PL PILOT LAMP 38 Ww 2200 10 iX 15 SWAN 5 EW 1 SKS 105 8 6 FT 101 B PARTS C CAPACITOR PRINTED CIRCUIT BOARD PB IISI A Z DIPPED MICA Q FET amp TRANSISTOR sowv 20 _2SC372Y SOWV _ 40 2SC373 SOWV I00PF 2567848 S0WV 470 2SKI9GR CERAMIC DISC 3SK40M 22 SOWV 0 001 4F ess 13 SOWV 0 01 uF 0 0474F pe 181555 L _ ESISTOR_ T CARBON FILM CERAMIC FEED THRU 14 16 M 500WY 0 001 P I ELECTROLYTIC 18 x 16WYV TC TRIMMER CAPACITOR LL I CERAMIC 7 ECVIZWSOP32 SOP F INDUCTOR BPF A BPF B BPF C RF CHOKE 1 95 x RF CHOKE 2504H T TRANSFORMER
39. 106 122 500WV 30PF 1 4 9 12 Si 10D10 5 6 10 42 43 47 500WV 50 7 8 Si V06B 135 500W V 60PF 48 53 55 92 99 500W V 100PF R RESISTOR 46 111 500W V 150 CARBON FILM 4W _ 470KQ 29 500WV 200PF CARBON COMPOSITION IW 3 30 4 9 127 500W V 250PF E P 2W 5 69 41 500WV 270PF METALIC FILM 5W 2200 45 500W V 300PF 105 108 500W V 400PF c CAPACITOR 2 26 136 500W V 470PF 6 CERAMIC DISC 50WV 0 0474F 128 129 130 500WV 820PF 4 500W V 0 01 7 27 120 121 131 500W V 1000PF nas c 1 4KV 0 00474F z 2200PF 3 ELECTROLYTIC 25WV 4704F 133 3000PF MAIN CHASSIS 100PF 200PF 1000PF 0 014 F 33 38 50 52 59 61 66 50WV 0 0474 F 69 73 85 89 91 94 95 100 103 _ 8 14 15 20 22 500WV 0 00474 F 7 I Ge 151007 3 19 21 101 102 500W V 0 01uF 1 3 8 11 13 Si 181555 774 0 001uF 14 Si 151941 24 0 0047 F 9 __ Zener WZ 090 36 75 0 01wE 725 RDA30 150PF RESISTOR 132 3KV 600PF 48 CARBON FILM 30 32 CERAMIC FEED 22 34 35 37 39 40 67 800WV 0 001 F 18 110 26 PLASTIC FILM 50WV 0 22 F 65 68 m 50 0 474F 50 METALIZED PAPER 160WV 0 474F 70 ELECTROLYTIC 16WV 1 23 24 33 34 16WV 104F 25 _16WV 2204F _54 CARBO 450W V 2 24F 4 9 17 39 69 _ 2 800WV 1002 14 51
40. 151555 anode is connected to Take the remaining piece of hookup wire strip the ends 1 4 inch and solder one end to 13 on the processor board Route it down through the Chassis to pin 19 of MJ 3 and solder the free end there The processor is now in at all times so to allow you to switch it in and out at will an extra switch must be installed Many owners stop right here and just leave it in the circuit at all times No extra hole is avallable for a switch so some ingenuity on the part of the owner is necessary unless he has no qualms about drilling a new hole in the panel One suggestion Is to mount the switch to the shield at PB1104 which leaves it accessible and looks neat Wire the SPDT switch so that the anode of the 151555 diode can be Switched between the OFF and ON lugs of the PB1494 Open the hookup wire you installed earlier the first one that runs between the OFF lug and the anode of the new 151555 diode and solder the anode side to the switch common the board OFF lug side to one side of The switch and then run another 3rd piece of hookup wire between the other side of the switch and the ON lug of the processor board Recheck your assembly and test for operation adjusting it as required for the different bands CW FILTER INSTALLATION 1 Remove top cover of transceiver cabinet and locate printed circuit boards PB1315A and PB1185B 2 Remove two screws holding 1515 to the U shaped brac
41. 29 0 mHz top of meter should read 200 ma 5 ma If you have no major deviations in plate current from those given above your problem is elsewhere Before you begin a re alignment make sure the 6 56 mHz trap TC30 is aligned correctly See page 7 7 step 7 After the trap is set and if you still have unequal power output go back to step 1 and tune the rig to 28 75 mHz with 200 ma indicated plate current IC Then tune TC2 for maximum Leave the carrier contro alone to step 2 and tune up at 29 0 mHz and adjust for maximum indi cated IC Go to step 5 and tune up at 28 5 mHz and adjust for maximum indi cated IC 7 17 Finally go back to step 1 and reset the to 200 ma and check for equal output across the VFO range by tuning up at several spots between 28 5 and 29 0 mHz A certain amount of error might be expected if this is your first ex perience with aligning band pass filters so work it over carefully re peating steps 1 2 and 3 unti you have essentially the same power output across the 500 kHz band segment The curve you are trying to achieve is shown below in Fig 7 10 Fig 7 10 BANDPASS NETWORK CHARACTERISTICS PARTS LISTS amp ORDERING DATA CONTENTS PARTS ORDERING DATA PARTS LIST FT 101 PARTS LIST FT 101B PARTS LIST FT 101E EE EX SECTION 8 PARTS LIST AND ORDERING DATA Obtaining Replacement Parts When ordering you must specif
42. 3 VS TUBE SOCKET TSI03COI 23 22 S B0703 J RECEPTACLE amp JACK 1 4 5 7 8 1116 18 CN 7017 2 S G7616 KEY 10 S G7814 PHONE 3 FM 144 MIC 6 9 _LPFILTER_ COIL JSO 239 ANT 450ABI2M POWER TRANFORMER amp INDUCTOR 12 P2240 SP ANT 5 0611 102 GRID COIL _ 14 SA602BLACC 103 DRIVER COIL A 15 16303 FAN 104 ANT COIL B E I DRIVER COIL I GRID COIL B SMHz TRAP M METER osc coll 1 _ 3 18MHz TRAP COIL 8 11 FT 101 E EE EX PARTS SOWV 0 0474 F PRINTED CIRCUIT BOARD Q FET amp TRANSISTOR 14 16 CERAMIC FEED THRU _ 4 TR 29Ca72Y 500WV 0 0014F rs TR 25 373 18 ELECTROLYTIC 16WV 1 3 2SC784R pener FET 2SKI9GR TRIMMER CAPACITOR AX 1 FET 3SK40M 1 3 CERAMIC ECVIZWSOP32 50PF D DIODE L INDUCTOR 1 2 Si 151555 1 zx BPF B _ RESISTOR s 722 CARBON FILM RF CHOKE 1 954H RF CHOKE n 1 INDUCTOR TRANSFORMER FET IC amp TRANSISTOR TR 2SC784R TR 2568280 1C 7045
43. 4 inch center conductor insulated and a 1 inch braid pigtail Remove the top cover and locate the VFO unit Install the processor board as shown in Fig 6 12 f yellow white wire is present between MJ 3 10 and this point clip it out and discard it Fig 6 14 The RF signal is now going to move up from pin 10 of MJ 5 through the first new coax into the processor lug get processed and return down the second new coax to lug 3 If you get into trouble this is where you use your scope check it out The jumper of course just moved the signal straight across to lug 5 So if you get absent minded and leave that jumper in place the processor will act the same in or out Now hook up the rest of the wires as shown in Fig 6 15 be neat and be careful soldering No overheating cold joints or solder splashes Strip and solder one end of a 21 length of hookup wire to the OFF lug of the processor In the FT 101EE or EX this is a white blue wire already in the bundle so you do not need to acd an extra wire Route the free end down under the chassis and dress it toward socket MJ 6 that s the one holding the regulator board Locate 12 using Fig 6 15 to help you orient yourself Mount the new terminal strip under the mounting screw of T12 that is nearest the center of the chassis 6 11 Wire up the 1494 as shown in Fig 6 13 dressing the wires neatly formed bundles as shown YELLOW LEAD
44. AND 8 FV 101 SP 101P FL 2000B or FL 2100 MICROPHONE WIRING lt FTV 650 WITH NECESSARY WIRING CHANGES 601 FV 101 2 lt lt 250 65508 FV 101B SP 101PB FL 2100B 101 27 Ve 5 mke YO T100 a dex 3 11 3 12 ASSEMBLY DISASSEMBLY COVERS 1 Look at the exploded view shown in Fig 3 1 remove the top plate by turning the two captive screws counter clockwise until they re lease then lift the plate away 2 Remove the bottom plate by first removing a Two 2 3mm hex nuts b Four 4 metal screws C Two 2 painted head Phillips screws 3 Remove the wrap around cover by removing the four metal screws and The remaining four painted Phillips screws and sliding the cover off the unit toward the rear 4 Store and protect the covers avoid damage The finisn While it is off the unit take the opportunity to wash the covers free of any accumulated dirt grime and if possible touch up any existing marks or scratches t helps the resale value as well as keeping the shack looking sano 5 Vacuum out any accumulated dust a clean rig will help you locate part identifications and improve the cooling capability of the FT 101 when you put it back into operation Now if you really get into a major effort and the front panel has to come off next Fig 3 2 will show you how it s done AS
45. B5009 VR POTENTIOMETER 2 ALO VIOIKR BSKO VOXXTONE VIG0KRZ IBIOKQ TC TRIMMER DELAY VI60KRZ 1B2MQ 1ZWS50P MAX RELAY VIOIKR BIKO x 4 1ZW20P MAX ANTI VIOIKR C CAPACITOR C CAPACITOR DIPPED MICA 1 5 10 DIPPED MICA 500WY _ 100P 10 500W V 100 10 SOOWV 130P 1022 2 15 17 18 28 ELECTROLYTIC 4 SOOWV 150P 10 16WV 104 35 500WV 10 4 16 39 41 14 500WV 200P 10 5 6 7 10 13 19 31 34 16WV 1004 T6WV 19 27 32 5 1025 20 28 30 5009 7 10 8 38 37 44 45 46 21 500WV 300 10 36 22 16WV 474 23 500 v 1000P 10 12 16WY 2204 29 35 21 MYLAR 15 ELECTROLYTIC 16WV 1005 sowv 0 14 2022 30 SOWV 0 00224 2072 SOWV 0 224 20 n PLASTIC FILM 2 24 20 8 9 13 16 17 24 26 29 33 CERAMIC DISC 5 19095 0 0 1 9 20 25 26 27 42 MYLAR 11 22 25 34 sowV 0 0474 SOWV 20 SOWV 7 19977 5 0 047 2022 R RESISTOR SOWV 0 022 20 3 2 Works 1509 10 SOWV 00014 20 30 34 gt 2 4700 10 R RESISTOR 34 Works W100KQ 1025 3 14 19 26 27 34
46. Frequency Stability Within 100 Hz in any 30 minute period after warmup Power Source FT 101E Size 210 W x 153 x 285 D m m Weight 3 5 Kg YO 100 MONITOR SCOPE Now you too can maintain the cleanest sounding signal on the band with the YO 100 Monitor Scope Compatible with virtually all transmitters and tran sceivers the YO 100 features wide range inputs for all mode monitoring even RTTY A built in 1500 1900 Hz tone generator adds to the versatility of this station accessory A full compliment of front panel controls allows operator control of all key adjustments Complete your station with the YO 100 SPECIFICATIONS Vertical Sensitivity 200 mV P P cm Frequency Response 10 Hz to 40 kHz 3dB 3180 kHz 455 kHz or 9 mHz inputs optional Direct 10 Hz to 60 mHz Input Impedance 500 K ohm Horizontal Sensitivity 300 mV cm Frequency Response 10 Hz to 16 kHz 3dB Input Impedance 500 K ohm Sweep Frequency 10 Hz to 10 kHz Two Tone Generator Frequency 1500 Hz and 1900 Hz Output Level 50 mV Power Requirements 100 110 117 200 220 254 VAC 50 60 Hz Size 210 W x 150 H x 290 D m m Weight 6 Kg Fig 1 31 YP 150 DUMMY LOAD WATT METER The model YP 150 can be used as dummy load and power meter within the frequency range of 1 8 mHz to 200 mHz Three switch selected scales assure accurate power measurement in high and low power range Built in fan cools unit for stable measurement
47. HC 2SU 20020MHz FIX UNIT 15M 250 27 020MHz PRINTED BOARD PB 1060A 10 34 020MHz Q FET 10B 34 520MHz 1 1 F 10C 35 020MHz D DIODE 10D 35 520 gt 15145 WWY 16 020MHz L INDUCTOR CB 33 020MHz OUT COIL RFC 2504H Sus OPTION He 2su VS VACUUM TUBE SOCKET TC TRIMMER 2 TZW20P MAX 9P S 103 Col C CAPACITOR 3 12P SB 0703 DiPPED MICA J JACK SOOWV 60P 10 4 S 8 CN7017 SOOWV 107 10 567615 2P CERAMC DISC 144 4P FT 101 PARTS 380 339 INCH 3 350 2 12P P2240 16 107 DIPPED MICA S BO6ii SP SOOWV 10 1022 SA 602B 2 26 29 470P 10 S 16303 4P 105 500WVY 200P 10 7 27 120 121 5 1000P 10 RCA CN7017 28 98 126 500W v SP 1075 5 3001 2P 38 53 55 92 99 SODWV _ 1022 5 3601 GP 122 SOOWV 1025 7 INCH 4 ai SOOWV 330P 1077 450 PI2F 6 43 SOOWV TOP 10 P2240 USPLUG 9 S00WV 270P 1025 S 10401 SP 42 47 5009 5 10 602 44 97 106 SOOWV 10 108 500WV __30 10 1 370i 18 104 SO0WV 10 XI 8007 22 35 300P 10 SI 4703 14 36 SOOWV 150P 1025 123 500
48. Power 10 watts PEP on SSB 10 watts 4 watts on AM and FM Drive Requirement 3V RMS at 28 to 30 mHz 10 watts CW at 50 duty cycle Fig 1 34 FTV 6508 6 METER TRANSVERTER SPECIFICATIONS General Frequency Range 50 54 mHz Mode SSB AM CW and FM Size 210 W x 153 H x 285 D m m Weight 4 Kg Receiver Sensitivity 0 5 uV for 10 dB noise plus signal to noise ratio when used with our tran Input Impedance 50 to 75 Input Frequency 28 to 20 m Harmonic and other Spurious Internal Spurious s ection better than 50 dB ow 1 uV equivalent to antenna input Transmitter Input Power 50 watts PE 10 watts on Drive Requirement 3V RMS at 50 duty cycle raren ron TX GAIN To compl iment your station add 101PB speaker phone patch console It features a shaped response speaker 300 3000 Hz ideal for quality communications reproduction Built into this matched unit is a hybrid phone patch with individual gain controls for receiver to line and line to trans mitter levels VU meter monitors the phone line audio level Full VOX phone patch operation is possible with SP 101PB Add this exciting accessory to your station today SPECIFICATIONS Receiver Input Impe Output Impedance Size 10 W x 153 Weight 3 Kg OPTIONAL ACCESSORIES XF 30C 600 Hz CW FILTER An optional filter providing 600 Hz at 6 dB 1 2 kHz at 60 dB
49. Solder Side 01 5 50129469 66 2 pue 91 9 6 9 8 3 1 0 1 9 1 9 ou pue Lars 05 9 J04S S 4 G H OU S j ul 1ON 16 9 9 vat 25 5 95 9 62 9 mi 1 0 91 5 02 9 6 21 95 9 2 0 91 3 11 3 52 4 61 0 v 1 01 0 81 9 2 1 92 9 85 2 61 9 81 5 21 3 SE 9 21 12 9 12 2 22 4 1 0 12 3 11 0 92 62 0 22 9 8 0 7 0 5 0 61 78 9 2 9 22 2 9 E 6 1 Z Y 9 2295 ved 571 2 0 6 21 EA 1 8 2 2 9 H V8lI 8d LINN YOLVINGOW 5 19 NOISE BLANKER UNIT 1292 2 Q2 2SKI9GR 01 25 372 F e u 04 2SC784R Q32SKI9GR NOISE AMP NOISE Aa NS Ke me 1 TE eg 5548 SOMME E 1292 2 D 0 D 5 20 Viewed From Component Side Viewed From Solder Side 1 9 3 71 5 21 3 bro 61 2 61 1 2 1 91 9 2 0 61 7 12 9 22 2 1 3 61 3 22 4 8 0 2 9 81 82 0 91 5 01 8 ER 6 4 92 9 21 2 i o 1 3 Cw 1 21 911 1 2 21 1 1 ap 12 qd LINN 33 4 3SION 5 21 POWER REGULATOR UNIT 1314 2 02 MFC6020 25kH MULT QI 25 372 24 MFC6034A 03 2SC735Y BUFF Joonhzosc REGULATE m Amos 0 00 029 Viewed From Solder
50. as shown in Fig 6 200r below WHITE RED GREEN BLACK YELLOW BLUE lt o to WIDE SPACE d EQ 9 DC TEST 1 Both power and heater switches off initially 2 Connect the DC power cord to either a 12 volt battery or a 15 5 volt power unit connecting the red cord to the side and the black cord to the side of the battery 3 Turn the power switch on Advance the AF GAIN switch Then make sure that the receiver is in normal operation Use your calibrator signal to check it out 4 Turn the heater switch on ensure the DC DC converter works and the fan motor runs Should the fan motor not function reverse the yellow and green wire connections for the proper polarity 5 1 is normal to hear a faint audible singing of the converter when it is functioning 6 18 HEAT SINK CLAMP Jl zl HEAT SINK di HEAT SINK COVER SCREW M3 x 25 M3 FLAT WASHER M3 SPRING WASHER FIGURE 6 19 HUM PROBLEMS IN EARLY FT 101 Occasionally a seemingly incurable hum problem arose in older model FT 101 with serial numbers approximately between 006400 and 058000 We don t know the exact beginning and end of this problem The hum usually appeared on both receive and transmit I was not bad filtering or a defective component it was caused by a ground loop and the fix was applied to PB1079 the voltage regulator calibrator board which in later FT 101 s became the PB1185
51. but by reviewing steps through 8 you should be able to adjust your ap proach accordingly Let s assume you want to put an FT 101 onto 2182 kHz First install an 8120 kHz crystal into the 160 meter slot or AUX if it is an early FT 101 Now turn to page 7 14 and examine Fig 7 7 I identifies the func tion and location of the trimmers 1 Turn cn the rig and receive the internal marker calibrator signal at 2200 kHz 2 Check for the presence of 0 3 VDC at the oscillator test point on PB1181 using a VTVM Adjust TC26 as required to get 0 3 VDC TC2nTCI19 TC25 TC28 TC22 TC21 NON CUN He i SILVER PLATE MAX TC28 FIG 6 36 2k UN TC10 TC8 TC TCE Peak the calibrator signal using the preselector set to the chart recommendation and then peaking TC29 for maximum in dication on the meter Now if you don t get a peak some where between minimum and maximum capacity of the trimmer add or subtract capacity across TC29 until you do Consider the chart value as a starting point and select the final value only when you get a peak somewhere in the mid range of the capacitor setting 29 is located on PB1188A the board closest to the front panel Now leave the preselector alone and modify the mixer driver by adding the recommended capacity across TC28 located on the middle board PB1187A Don t power up the unit yet Add the recommended capacitor to the dri
52. current for AM or RTTY not use antennas which are non resonnant or exhibit an SWR of more than 2 1 at the frequency used for operation 1 6 5 Do not replace driver or final tubes with other than factory brands 6KD6 6JS6 and 12BY7A should be TOSHIBA or MATSUSHITA 6GK6 should be G E Always re neutralize the finals whenever tubes are replaced Do not set books or other units on top of the transceiver This pre vents proper cooling Remember that specified power is input power and that the output will be considerably less than this figure Under continuous carrier applications such as AM or FSK the output is around 25 watts for the FT 101 1 150 ma TYPICAL TEST SET UP FOR SERVICING FT 101E LAMP FUSE ET SIGNAL GENERATOR N RG58 u Fig 1 4 157 CRYSTAL INFORMATION Crystals for the FT 101 series are al made to the same specifications so the correlation data below applies to all versions FUNCTION HOLDER FREQUENCY MODE LOAD SERIES RANGE kHz C pf R OHMS Band HC 25 U 7520 F 25 20 Band 25 0 9520 2 20 Band HC 25 U 13020 F 19 20 Band HC 25 U 16020 F 20 20 Band HC 25 U 20020 35520 3rd overtone 20 45 Carrier HC 6 U 3178 5 USB F 36 50 Carrier HC 6 U 3181 5 LSB F 39 50 Carrier HC 6 U 3179 3 CW F 34 50 Marker HC 13 U 100 F 65 1 5K Marker HC 6 U 3200 F Fixed HC 25 U 8 7 9 2 Range F 50 20 Fixed HC 6 U 8 7 9 2 Early Model F 20 20 To correctly determine
53. direction which reduces the current shown on the meter Repeat steps 6 and 7 until the meter indicates a smooth and equal rise on either side of the maximum dip point 4 12 FAULT TREE FT 101 Rx Turn on radio no nolse m d vol ume Check Check vol tage OK Fuse F1 1076 Replace Check Blows again Xfmr tap setting Norma Check voltage Abnormal Repalr Reg calib PB1314A Normal Check audlo board Check speaker Repalr DC unit Abnormal Repair PB1315A Replace speaker Inoperative or low sensitivity Apply signat to ant term 60 dB Check DC 1 DC AC module Q 1 0 2 258206 OK cable bad noperative or sensitivity Distortion Check another band Band crystal or trimmer defect Check PL 4 and PB1181 Abnormal Check speaker line for short No LSB Check 0 5 carrier amp OSC unlt Inoperative Rx test OK Check 03 PB1184 amp crystal Check Q6 No AM PB1184 amp No CW crystal Check Drifting regulator No USB Poor sens Itivity Fig 4 5 4 15 FAULT TREE FT 101 Tx Rx must be operating normal ly before beginning Connect dummy load and power meter Check for plug in ACC socket one band no indication Key Tx in TUNE and resonate plate load 20
54. e e ra tin fun co uy alae P UA PUR oflnfejnjofnjojn RA PSA LA ex ex ex 1 Begin the modification by tuning up the rig into a dummy load on the band that you are going to use in the modification to verify that no pre existing problems are present in the rig 2 Shut off the rig remove the power connector and discharge the high voltage 5 Remove the covers including the metel plate cover over the trimmer deck 4 Modify the local oscillator circuit by adding or removing capacity in parallel with the appropriate trimmer 5 Insert the correct crystal as taken from the table Crystal ordering data is provided in Section 1 of this manual if you need it 6 Now add remove the appropriate capacitor to the mixer stage and the driver stage again in accord with the tables 7 Count the turns on the final tank coil and tap it as indicated 8 Re check your work to be sure you have not hard wired a short into the rig and if it is up to your quality standards re install the boards shields etc and re align the rig We will step you through one of the more difficult jobs so you can see read what is going on but remember that modification of an early FT 101 and latest issue FT 101E is going to involve different board numbers
55. for crystal controlled operation CAUTION The crystal will be active on all bands 2 MODE SWITCH LSB USB TUNE CW AM The MODE switch is a five position switch This switch is used to select the mode of operation LSB USB CW or TUNE position the AM CW and TUNE position separate crystal is used to shift the carrier frequency into the filter passband but it s level strength is set with control 9 3 GAIN AF GAIN The RF GAIN and AF GAIN controls are mounted on concentric shafts RF GAIN control lever control manually varies the gain of the receiver RF and IF amplifiers Maximum sensitivity is ob tained with the control set at 10 full clockwise The AF GAIN control round knob adjusts the audio output level at the speaker and phone jack Clockwise rotation increases the audio out put 4 TUNING KNOB The tuning knob located directly below the main dial window in combination with the band switch identifies the actual fre quency of operation when the clarifier 7 is off The VFO drive mechanism consists of a precision spring loaded split gear system in combination with a planetary drive unit to provide zero backlash at low tuning rates Each revolution of the tuning knob results in a frequency change of 16 KHz as indicated on the skirt surrounding the tuning knob 5 BAND SWITCH The band switch is an eleven position switch used to select the desired band for receiving or transmitting The band ind
56. is achieved This module also contains the 100 kHz 25 kHz marker generator Crystal controlled oscillator 01 250735 oscillates at the 100 kHz crystal fre quency and is used for dial libration Trimmer capacitor 1 is used to calibrate the internal 100 kHz against WWV or JJY Output from the oscil lator is fed into the 25 kHz multivibrator 02 MFC6020 which generates a marker signal every 25 kHz The multivibrator operates whenever the supply voltage is applied to pin 17 from the switch on the front panel The cal ibrator output is fed through the buffer amplifier Q3 25C735Y to the re ceiver antenna circuit from pin 16 As noted elsewhere this signal is al So used for troubleshooting and analysis of receive problems 1 21 050 BUFF foi 2ski9GR 02 2SKISGR UNIT Fig 1 18 VFO UNIT PB1056 The VFO module board is installed in the VFO chassis The VFO uses FET transistors 01 2SKI19GR and Q2 2SKI9GR first buffer Q5 25C572Y buffer provides isolation and amplification of the VFO signal The VFO oscillation frequency is 8700 kHz to 9200 kHz providing a spread of 500 kHz Varactor diode 01 15145 in series with capacitor C14 is switched into the circuit by the clarifier switch and the relay contacts to shift the VFO frequency for receiver offset tuning The offset does not affect the transmitter setting BY 067 Fig 1 19 1 22 Xio JJYVW
57. of the bands marked on the dial For example if your desired frequency is between 1 8 and 3 0 mHz plan on using the 160 meter crystal position between 3 0 and 5 0 mHz the 80 meter slot 5 0 to 8 0 mHz the 40 meter slot and so on As preliminary work identify what band you are going to use and the crystal socket location Look over Table 5 for frequencies between 2 0 and 5 0 mHz Table 6 for 3 0 to 8 0 mHz and Table 7 for 8 0 to 28 0 mHz These tables will identify what capacitors you will need at the var ious oscillator driver and final stages as you progress through the mod ification TABLE 5 Number Part 2 1 mHz 2 4 mHz 2 7 mHz 25 0 8 020kHz 8 120kHz 8 420kHz parallel b capacitance 80 pF 80 pF 80 pF to TC26 parallel c capacitance 820 pF to TC29 parallel 820 pF 820 pF capacitance ceramic to TC28 parallel capacitance capacitance for S1J capacitance h turns of PA coll 2500 pF 2000 pF 20 20 6 51 6 TRANSMIT RECEIVE 1000 5000 TABLE 7 FINAL COIL RECEIVE s BAND SEL pF A BAND XTAL mHz FREQ Z f N o o vo r r eo DOR CERDO D IN fq of Of o 0 lo o OfINOfiNfofinfo o in o in fun tin C ep e ep
58. or equiv alent VTVM with an RF probe good to 40 mHz 5 Dummy Load Yaesu YP 150 or equivalent 50 ohms non reactive load ra Ted at 150 watts CW power 4 AF Signal Generator Hewlett Packard Model 200 AB or equivalent 5 General Coverage Receiver covering the frequency range from 3 to 30 mHz with a 100 kHz calibrator FRG 7 FR 101 or equivalent 6 Frequency Counter Yaesu YC 355D or equivalent 7 1 ALIGNMENT OF TRANSMITTER MIXER DRIVER AND RECEIVER FRONT END STAGES The final amplifier bias adjustment must be set to 60 ma before ex tensive operation of the transmitter is attempted I Is assumed that the signal generating stages of the transceiver are functior ng properly You can use the internally generated signal of the transceiver to align the transmitter mixer and driver stages and the RF signal generator to align the receiver front end stage We will start at the highest frequency of the rig and align the transmitter section then without moving the preselector align the re receiver so it peaks at the same point If you get a rig where Tx and Rx do not peak at the same point chances are good that re alignment in ac cordance with this procedure will cure your difficulty Then we will align the various traps and set the adjustments you work carefully your FT 101 will emerge from the alignment meeting all factory specifications Remove the covers and read through the procedure so you understand The sys
59. pin 12 For AM and CW the output signal from Q2 is fed directly to the high frequency IF unit Through CARRIER potentiometer VR2 on the front panel from pin 8 1 20 PB 1314A Fig 1 16 E 1079 Fig 1 17 POWER REGULATOR UNIT PB1314A The DC 13 6 volts from the rectifier unit is supplied through pin 14 to the voltage regulator 1 04 MFC6034A in this unit to obtain a stable 6 volt DC supply which is then fed to the various circuits from pin 13 The regulated voltage is also supplied to the CLARIFIER control which is used to offset the receive frequency 3 kHz either side of the transmitted signal when activated VR4 permits adjustment of the voltage to vary the receive and transmit frequency so it will coincide at the CLARIFIER zero or OFF pos ition A 100 volt negative voltage is delivered to pin 5 of the unit from the rectifier board PB10768 VR2 sets the operating bias at approximately 50 volts for the final amplifier tubes This bias voltage is 60 volts on receive and supplies the grid circuit of the final tubes on the main chassis from pin 2 Tne bias for the driver tube 128Y7A is also supplied from pin 4 This voltage is 20 volts on receive and 3 5 volts for transmit Notice that these are voltages and not related to the IC reading The meter when set to IC reads cathode cur rent which in the idle position should read 60ma With the FT 101 keyed in the SSB mode adjust the bias current until 60ma
60. wired correctly or better substitute a known to be good cable connector assembly POWER PLUG COMPARISON YAESU CINCH JONES PIN Fig 1 2 Try to install the unit in a cool area and don t impede the air flow circulation through the unit by putting books papers or other equipment on top of the case The FT 101 is rugged as the dickens but like all solid state devices it does not like to be overheated So avoid hot air vents steam radiators or Southern California direct sunlight and your unit will go for years without trouble If your ambient Temperature is normally 95 degrees F or higher a fan FA 9 is often an excellent investment good all Yaesu station set up is shown below The United Nations Station K2UN in New York Mobile installations should also be done with some consideration given to heat dissipation and build up Don t run the vehicle heater output onto the rig or onto the converter transistors Maritime mobile installations rarely have heat build up problems but antenna matching and loading almost always requires a match box set up and serious antenna work in order to achieve good efficiency and low SWR Mount the unit so it is mechanically secure and shielded from water splashes slush or dust bui d up Vacuum the unit occasionally and clean up any dirt accumulations Dust and dirt act as insulators and will cause heat build up 1 NORMAL TUNE UP ABBREVIATED The follow
61. with 1 cm length of 1 mm yellow tube Locate the unsoldered and insulated red coax cable at the side of 5 Solder inner conductor of the red coax cable to Pin 10 of 5 yellow coax cable is not used and the end of it should be insulated by tubing Prepare the 45 cm length of yellow coax cable Solder the inner conduc tor to the terminal of 6P terminal board from which the wire is removed by Step 4 Solder the outer conductor to the ground where the outer con ductor of the red coax cable was soldered by Step 5 Please do the sol dering work very carefully so as not to damage the coax Insulator Lead the three wires soldered by Step 2 Step 3 and Step 6 above the chassis through an opening near the VFO gear Solder black j and white orange g wires and 10K ohm resistor c as illustrated in Fig 6 2 Remove screw marked and loosen screw marked in Fig 6 3 Slide trim mer board toward arrow direction and lift Locate the clarifier poten tiometer and disconnect all soldering from the potentiometer with sold ering iron Remove knob and remove the potentiometer 3 black g white orange Clarifier Trimmer Board Fig 6 3 Install the new potentiometer soldered in Step 8 Resolder all wiring re moved in Step 9 as illustrated in Fig 6 4 Solder the other end of the 10K ohm resistor to the terminal of clarifier switch where a white brown wire is soldered to Clarifier SW C
62. 0 kHz Adjust L29 for minimum S meter read ing L22 eliminates the interference by the 9th harmonic of the carrier os sillator Tune the transceiver to 28 600 kHz USB in the receive mode and increase RF and AF gain control until an audio beat note is heard Adjust L22 for minimum audio output T113 the high frequency unit 11808 is used to minimize spur ious radiation on the 20 meter band For alignment tune transceiver to maximum output into a dummy load at 14 350 kHz in the tune position Measure the spurious radiation by using the S meter of another recelver tuned to 14 520 kHz where a spurious radiation can be heard Adjust T113 for minimum S meter reading on the external receiver without de creasing the power output of the transceiver T115 Is located on a printed circuit board near the VFO unit and is used to suppress carrier oscillator feed through Tune the transceiver to any frequency and load it to full output Reduce the microphone gain zero and place the mode switch in the USB position Adjust T115 for minimum S meter reading on an external receiver tuned to the frequency you set the transceiver up on 128 is used to eliminate spurious radiation on the 15 meter band Tune The transceiver to maximum output at 21 200 kHz in the tune position Locate the spurious radiation at 21 220 kHz on another receiver then adjust L28 for minimum S meter reading on the external receiver TC30 is connected in series w
63. 0WV 0 0224 F 2 u IC C 60 3 25 26 39 48 50 50 0 047uF 4 _ IC MFC 6030A 4A 23 32 37 43 45 50WV 0 1 sn 5 6 7 10 14 2IELECTROLYTIC 16 D DIODE 11 1 2 3 Si 151555 2 16 19 20 31 36 3 8 35 u 16WV 22 R RESISTOR 40 164 334F 3 6 CARBON FILM 4W _ 1000 4 18 38 42 49 16WV 1004F 10 19 20 BM iU i 4709 13 41 44 l6WV 2204F 8 560Q 7 21 __6800 16 1 5KQ PRINTED CIRCUIT BOARD PB 1184 A Z 17 __4 7KQ Q FET amp TRANSISTOR 1 4 13 15 18 __10 2 3 5 6 _ TR 2SC372 2 2 15 4 TR 2SC828P 14 47KQ 1 FET 2SKI9Y 2 5 gt 100KQ lt 9 CARBON COMPOSITION W 4 70 z Lo DIODE 11 2W 6 8KQ 1 4 151007 i 8 13 FT 101 PARTS VR VARIABLE RESISTOR TRANSFORMER ar 4 TRIIR u 50098 ETE IF TRANSFORMER R12 4129 r 1 2 V160K 10KOB ta 5 PRINTED CIRCUIT BOARD PB 1534 c CAPACITOR FET amp TRANSISTOR 7 9 DIPPED MICA 50WV 30PF TA7060P 5 10 0 50WV 40PF FET 2SKI9GR 1 50WV 100PF TR 2SC372Y 2 S0WV 250 I 3 Ir 5 2000PF DIODE 4 6 CERAMIC DISC 5 0 014 Si 151555 17 PLASTIC FILM 50WV 0 0014F Varactor 152236 15 2 _ 0 1 250W V 0 047 F CRYSTAL FILTER 713 14 DLECTROLYTI
64. 100 117V SA 17 IKWV AC 200 220V 3A 76 160WV DC 13 20A MYLAR FH FUSE HOLDER SOWV 0 474 2000 AC SN i001 SOWV 2 20 DC SN 1102 IKWV 100P L INDUCTOR IKWV 700 P 8 igWS6U 0 69218 I SKWV 1000P P 5 7 IWS62 ITS CERAMIC RDA30 150P 107 15 RFC TV 245 ELECTROLYTIC 16WV 10 PLATE __16WV 100 TANK COIL m 3004H 63 16WV 2204 25020 127 I6WV 4705 28 6MHz TRAP 124 25 1000 W562 0321075 109 2509 225 L P FILTER SOOWV 1005 TRAP 30 31 32 39 40 67 FEED THROUGH BYPASS 68 84 37 34 35 30mA LEAD LAMP ANT COIL A I 52 DISC GRID COIL 61 66 70 71 72 73 85 89 SOWV 0 047 P DRIVE COIL A 91 94 95 96 100 103 119 ANT COIL B 51 69 62 81 82 Sow v yv GRID COIL B 83 i DRIVE COIL B 3 SOOWV LOCAL COIL 14 15 20 22 SOOWV 0 0047 SMHz TRAP L3KV DC 3700P 6 36 MHz TRAP DC 001p 7 318MHz TRAP L4KVDC 0000 m T TRANSFORMER R RESISTOR POWER TRANS 2 lt w 3 3KQ 1075 20mH 05 CHOKE 3 36 Ww 47KQ 10 20mA CHOKE 4 4 17 39 1 W 560 10 TC TRIMMER 14 21 51 52 14W 1009 1022 6 7 8 11 26 28 39 IZW MAX L W 22K9 10 IZW 10 MAX I 38 49 xW TKO
65. 20 to 6020 kHz bandpass network The signal from the receiver 1st mixer is fed to the gate of the mixer through the bandpass network 11 L2 and L3 from pin 15 VFO voltage is also applied to the 2nd gate of Q2 from pin 11 The signal is converted to 3180 kHz low frequency IF and fed to the following stage through pin 3 output transformer T112A transmit the 2180 kHz signal is fed to the base of the mixer from pin 5 A 14 mHz trap coil T113 is connected to the base circuit of 01 The VFO signal is fed to the emitter of the 01 which produces the 5520 to 6020 kHz high frequency IF signal This signal is fed to the following stage from pin 16 through the bandpass net work 1 16 PB 11838 Fig 1 12 PB 1080A Fig 1 13 LOW FREQUENCY IF UNIT 1183 This module contains the low frequency IF amplifier crystal filter detector and AGC S meter circuits On receive a 5180 kHz signal from the noise blanker circuit is fed to the gate of 01 2SK19GR FET from pin 15 of the module This signal is also fed out through C3 to pin 17 where it appears at J7 as IF OUT drive for a pan adapter or other high gain display 01 04 are diode switches which select the crystal filter for SSB CW reception The 600 Hz CW filter XF 30C is an optional feature avail able at additional cost from your dealer The diode switch selects the CW filter automatically when the MODE switch is set to CW position This control voltage is derived fro
66. 20B13 EVHBOASISBI3 EVKA2AF02314 5 w EVKA2AF01339 SKQA SKQP TRAIR 50001 DIPPED MICA 5 SO0WV 2PF 0 SPF 0 SPF SOOWV SOOWV SOOWV 500WYV S00w v soowv 7150 0 _ 200 19 250P F 1022 E SOWV 0 047 SOOWV 0 01 pw 1 4 0 00474F 270PF 300P F lt 10 400P F 1075 ELECTROLYTIC 128 129 130 470P F 10 3 25WV 4704F 500WV 2 10 PES 120 121 SOOWV 1000PF 10 V VACUUM TUBE 500WV 2200 1022 1 S 12BY7A I 500 3000PF 10 2 3 u T MOULDED MICA Q TRANSISTOR m 104 IKWV 10 TR 25 206 u IKWV 100PF 10 IR 2SC372Y 2 IKWV 200PF 10 1 SKWV 1000P F 1022 Ge 151007 CERAMIC DISC FT 101 B PARTS 51 62 65 81 83 86 87 SOWV 001 Z F 0 55 T TRANSFORMER amp CHOKE COIL 90 118 11 POWER TRANSFORMER 33 38 50 52 S9 61 SOWV 0 047 F 12 AF CHOKE 20mHO 5A 66 69 73 85 89 91 94 95 100 103 _ F FUSE 14 15 20 22 SOOWV 0 0047 5211 SA 100 117V 3A 200 234V 3 19 21 101 102 SOOWV 0 01 uF 172 DC 20A 74 14KV O OOF FH FUSE HOLDER 24 1 4 0 00474F 1 AC S NI0I 36 75 0 01 AF S N1102 25 RDA30 3KV 150 102 RL
67. 22 n 1 Q 1 15 12 1 9 Q 2 14 ls Has n o Q 2 14 12 5 Q sj mns os ms mn 55 ta amp 12 12 5 5 0 0 85 Q 4 07 1 5 84111 55 85 1 95 1 5 9519 N rod Q 6 0 15 0 11 F 1 NBON NB OFF vi High Frequency IF MIX Unit PB 1180B E 5 C D B ic ss 15 s 0 9 0 85 G1 Q 2 10 5 1 a 99 0 5 61 Fig 4 11 Low Frequency IF Unit PB 1183C Modulator Unit PB 11844A Z w E S C D B G E amp B RT ROT t z n s usl o 0 Q 1 ts 09 n n 85 0 A ls Q 2 0 5 1 5 12 ans 1 18 12 Q 2 i 0 3 1 5 H 45 0 65 MODECW Q 4 036 0 6 amp 5 o s 0 Q 3 045 0 45 5 5 5 5 0 95 0 95 MODE USB T QQ 5 0 o 55 11 0 38 0 Q 4 12 2 s 18 Q 5 0 45 0 45 5 5 5 5 0 95 0 95 MODE LSB TC PIN NO 1 Q 6 10 045 5 5 5 5 5 0 9 MODE CW N NO R 06 25 04 18 75 12 65 0 6 Q 3 I 2 7 5 12 12 12 12 32 Audio Unit PB 1315A RF Speech Processor Unit Fix E 8 C D B G ete nk PROCESS 0 45 04512515 0 0 ee PROCESS 0 45 0 45 12 5
68. 28 34 Works W470KQ 10 2ST BPF 3 22 25 M WorkgW100KQ 10 4 7 17 20 34 Works W 1002 10 1 2 40T BPF 4 2504H 5 18 34 Wort W2 2KQ 10 T INDUCTOR 6 30 2 1 5 10 112A MIXER COIL 3l 34 Workg W2202 10 113 14MHz TRAP COIL 8 9 3 Works W5 6KQ 1022 VR VARIABLE RESISTOR 12 13 15 26 32 MWorkg W3 3KQ 10 1 5 B2 2KQ 14 WorkgW27KQ 10 C CAPACITOR 16 19 23 33 MWorkgWIKQ 10 DIPPED MICA 21 34 35 36 Wor W10KQ 10 24 27 34 Workg W4702 10 SOOWV _ 40 1022 SOOWV 470 10 29 W4 7KQ 10 5 100P 10 10 11 34W 1000 1026 CERAMIC DISC Sowv 0 014 No 4 AF UNITJ 3 4 5 7 10 15 9 5 0 047 559 PRINTED BOARD 1081C FEED THRU BYPASS Q FET TRANSISTOR amp IC 12 13 14 5 1000P gt 9975 MK 10F R RESISTOR 25 372 25 828 34 Works W27KQ 10 34 Works W3 3KQ 1076 25 373 34 WoriZWIKQ 10 TA 7042M 34 Works W 1002 10 STK401 Works W22KQ 10 E 2 3 4 Wor WISKO 10 5 7 1 151941 34 Workg 100 1076 15334 T 34 Works W100KQ 1096 3 IF UNIT FT 101 PARTS 110 MOD COIL VR POTENTIOMETER TX BM Vi0iKR
69. 4 494113 amp 2 9 92 4 9 0 62 9 12 12 3 01 0 11 0 8 0 1 0 82 9 61 3 92 2 11 5 ve 9 62 2 0 9 22 4 91 5 1 9 5 0 ZA 1 0 02 3 1 8 2 y 9 Sc u L7d 2 0 5 3 1 0 1 1 4 2 6 9 Q 8 0 11 9 y 1 8 4 2 01 059 6 dJ 721 2 811 94 4 DN3nD3yj MOI 5 16 HOLIMS 825 30 V7 c y c SN1d 44 30 ane MO pene wx GOW WV Ar 119110 215952 AZLSOSZ ZHNS 6LLS da1vIndon ZO INANI 2 m LHI XY 0 x1 8313 OF IU 49 018 01 85 OL 050 851 T wx YOLV INON E Baws ie SNI That n 0 10 i 6161 84 LINN dV 30 8 WOU 911 8d NI LON NAHM OND 25 40 SNId LINN 4 GOW VZS jO Z Nid 40 OL 333308 950 asn LL Wix 95811 89 9828052 a 215952 E 2 6 81 LINN 21 30 5 014 9 v HB c ZHAG 8416 AlddNS 2046751 5 01 1 44 5 UIMOd WVUIVIG 32018 1 4 84 DSO pu GOW MODULATOR UNIT PB 1184 A Z 03 25 372 USB sev 18 04 25 82 BUFF 02 25 372 AM MODE BUFF 06 25 372 PB 1184A Viewed From Component Side 5 18 Viewed From
70. 50 microvolts at the antenna termin als and can be adjusted to that value using a precision signal generator while adjusting VR2 located on PB11838 1 25 PLUG IN MODULE CIRCUITS BASIC CIRCUITS The basic circuits used in the FT 10 are described in the following paragraphs to help understand the functional descriptions provided later in the manual INHIBIT GATE The signal normally passes through an gate adding a second signal closes the gate and prevents the signal from going through One of the most common forms of the INHIBIT gate is the series gate shown in Fig 1 26 When the diode is biased off the gate is closed and signals cannot pass through When the diode is biased on the signals go through the di ode and reach their destination Visualize it as a remote controlled switch that we use to route signals into circuits or to isolate signals from get ting into circuits LIMITER CLIPPER The limiter clipper is a circuit that removes positive or negative peaks from waveforms t can be used either as a waveform clamping circuit or as a protective device to prevent excessive voltages from reaching a sen sitive circuit Fig 1 26 shows a limiter that prevents the negative peak of a pulse from going more negative than about 0 6 volt Note that for a con ducting silicon diode the cathode voltage is about 0 6 to 0 8 volt more neg ative than the anode CLAMPER DC RESTORER The clamper or DC restorer is a circui
71. 53 55 fi 16 VC VARIABLE CAPACITOR E 95 1 PLATE AIR RTISB300VC 300PF 7 38 66 2 LOADING AIR C123A129 101 PARTS TC TRIMMER CAPACITOR MJ MULTI JACK 5 CERAMIC ECV1ZW10P32 10 1 2 6 3305 018 011 18 1 4 11 25 ECVIZW50P32 50PF 3 4 3305 022 011 22 7 8 9 MICA B 1PY 40PF 5 3305 014 011 14 6 31 B 2PY 100PF 7 3305 010 011 10 10 26 28 29 B 7P 420PF 27 AIR TSN 150C 10PF PL 30 PLASTIC FILM CTY12B 10 1 24 16V 0 15A 14V 40mA INDUCTOR 5 6 LED TLR 104 12 13 16 18 20 CHOKE 2504H 21 26 31 35 PLH LAMP HOLDER 3 11 36 RF _CHOKE TV 245 250 H 1 2 001011 9 RF CHOKE PLATE 3004H 3 B 1 RF CHOKE PLATE 5004H 2 RF CHOKE lmH J RECEPTACLE amp JACK 24 P S 14 56 90 3 1 0 5 1 4 5 7 8 11 16 18 CN 7017 1 4 37 P S 5600 6 475 2 S G7616 KEY 5 6 P S 1W5691 0 4TS S G7814 PHONE 8 TANK COIL 3 FM 144 MIC 22 TRAP COIL 6 JSO 239 ANT 28 TRAP COIL 9 450AB12M POWER 29 TRAP 12 P2240 SP 732 13 5 6 VFO 33 TUNING COIL 14 SAS02B ACC 25 L P FILTER COIL 15 S 16303 FAN 14 15 RF CHOKE 354H gt T TRANSFORMER amp INDUCTOR M METER 101A ANT COIL 1 MK 45 102 GRID COIL 103 DR
72. 68 PB1076B PARTS LOCATION TRAP BOARD PB1109 COIL BOARD A PB1083 COIL BOARD E PB1166 DIODE SWITCH BOARD 1186 PAGE 5 24 5 25 5 26 5 27 5 28 5 29 5 30 5 31 5 32 5 55 5 34 5 35 5 36 5 37 5 37 5 51 5 57 5 38 5 38 5 39 5 40 5 40 5 40 5 40 Vt Gl18d ves19a 5539044 286184 262189 262194 262194 262189 Z8118d dd3yNV19 9940199 9940199 9910184 9940189 9920199 89 0184 V9L018d 1938 ld Vv8l18d Ves liad 184 Vest 184 781184 8 0184 9181199 9181199 91811989 9181199 9181199 9LL018d p4eog V0801 8d 30 4Jed 0581184 9581184 8 8118d 8 8118d 808118d 5184 94018 9081199 96018 Vr Ie 18d 808118d VrI 18d 94018 8081184 Vrle18d d 960184 dn 1005707 N S 9161 X3 33 3101 14 006702 100 61 N S PIN X3 33 3101 713 umop 000751 N S 41493 x3 33 3101 13 dn 9 10090 N S 9427 8101 14 olny 31 01 3 74H 931 O4A AN3W3 ldWOO 3inoowadvo8 101 14 9881189 1184 681184 960184 00090 N S AIJe3 9101 14 81184 08118d s8118d 960184 dn y 100752 N S 9481 080184 2980184 YL018d 960184
73. 7 8 14 16 19 35 SOWV 0 047uF Sal 4 18 38 42 49 16WV 100 uF 13 41 44 16WV 220 uF PLASTIC FILM 29 SOWV 0 47 uF 2095 ELECTROLYTIC 30 16 1104F L INDUCTOR RF CHOKE 2504H 7 T TRANSFORMER amp INDUCTOR PRINTED CIRCUIT BOARD PB 1184 A Z 108 IF TRANSFORMER Q FET amp TRANSISTOR 109 IF TRANSFORMER DETECTOR 2 3 5 6 TR 25 372 XF CRYSTAL FILTER 1 4 TR 2SC828P 1 ET XF 32A SSB 1 FET 25 9 E XF 30C CW OPTION _ Ge 151007 R RESISTOR car ir CABON FILM 100 Q 1022 150_Q 10 xw 180 Q 1022 470 Q 1022 1 KQ 10 1 SKQ 10 2 2KQ 10 1022 2102 KQ 1022 102 _ VARIABLE RESISTOR i TRIIR CcAPACITOR DIPPED MICA 2 2KQ 10 SOWV 30 1022 _ 33KQ 10 1 40PF 10 3 SOPF 10 5 6 10 5 10 37 5 100P F 10 10 10 12 10 a SOWV _ 150 10 15 10 21 SOWV 300PF 10 5 MW 22 KQ 10 23 36 SOWV 1000PF 10 47 27 10 CERAMIC DISC 33 10 3 sowv 0 001 6 39 102 2 8
74. 78 IZW50P MAX Q FET amp TRANSISTOR C CAPACITOR 10D 25 372 25 828 DIPPED MICA 500 _ 250P 10 25 372 500WV 1022 500WV 2000 10 151007 500WV 10 X CRYSTAL 5 1000P 10 USB HC 6U 3178 SKHz SO0WV 40 1022 LSB HC 6U 3181 SKHz SOOWV SOP 1025 CW HC 6U 3179 3KHz L INDUCTOR ELECTROLYTIC 250WV 20 2504H 22uH 1SOWV 204 25WV 470uF 16 10004 101 CERAMIC DISC PARTS SOWV 001 sowy ooi 9 R RESISTOR 34 Works WI00K 9 1027 13 15 24 XCWorkzWIOKO 107 Wort W560 10 Works W100KQ 10771 Works W 1000 1022 Works W1000 1 NO 9 REC UNIT 4WorlZW47KC X107 PRINTED BOARD _ PB I076B Works W27KD 107 D DIODE i Worle W33KO 10 2 3 3 9 10 11 12 10010 Wore WISKO lt 107 151942 34 Wor Wa7KO 10 TODT C CAPACITOR 5 CERAMIC DISC 1 4 0 00475 4 Works WI 2KO S00WV Wort W2KO 37 SOWV 004764 po ELECTROLYTIC 25WV 4705 NO 7 VFO UNIT R RESISTOR PRINTED BOARD PB 1056 2W 5 60 10 Q FET amp TRANSISTOR k W 1 10 3SK22G IW 3 30 10 25 Tow 47 10 D DIODE 13 34 Wort W 470
75. 8 1 0 2 1 1 68 0 9 9 v H 1 0 1 5 1 9 4 9 e u 2 0 2 1 01 2 6 8 1 3 L 9 V6Y 9 IWLSAYD YOSSADOUd H2334S 44 5 28 RF SPEECH PROCESSOR CRYSTAL CONTROL UNIT PB 1534 A Z E 3 gi 8 1 9 s H I 655515 10 i EN I Ea 188 1 IN b 1 5 7 1 1 i E 5 L Viewed From Solder Side Viewed From Component Side 5 29 68 2 2 0 NO 5530084 9 4 09 2 1 1 5 Z H9 2 0 1 H9 9z 9 12 c H 12 2 1 8 1 9 NI 3 5530084 100 xi4 1 0 22 4 64 2 82 2 A9 178A ici 520 01 8 330 5530084 era ae YILIN 21 z 9 11 0 mE 1 0 vi u 0 91 8 1 2 gt 6 gt 61 9 6 91 9 ow 1 1 cS 12 9 1 0 61 4 00 2 29 9 0 ru 00 02 ol l oo es 3 5530044 2 9 ve u 81 0 s 62 2 51 0 9229 2 1 1 3 33437 YA PN 5 0 21 9 zu 7591 94 05532044 H2334 S 13 5 30 CLLIWX NI ONO 3NIT 0 1 NOIIR8ISISIO 304 S1In9819 101 13 01 4 6 0391 10N Qq31v1n938 90A9 4 L syd301A10 3910 SUA HA u3l3IuvT19 0L 11 144 5 Vl u3MOd 1 821 290200 21 00 344 8 01 1119250 0
76. 9 13 17 18 24 001 uF 2 36 37 46 AW 47 10 INO 470 1072 SOWV_0 047 uF 2 23 24 3 3MQ 10 PLASTIC FILM 5 6MQ 10 12 SOWV 0 22 2022 THERMISTOR SDT250 ELECTROLYTIC 15 16 I1004F 16 1 VI60KRZ 1 2 C CAPACITOR TC TRIMMER CAPACITOR 46 DIPPED MICA 100 10 CERAMIC G amp s 5 2 4 2 20 40 15 27 51 52 MYLAR SOWV 0 0014 2022 1 5 6 ECVI Z WSOP40 47 5 0 00474F 20 L INDUCTOR 1 9 12 17 22 33 34 SOWV 0 01 20 5 RF CHOKE 24 28 29 30 39 SOWV 0 022 20 2 4 6 7 RF CHOKE 3 25 26 48 50 SOWV 0 047 20 8 9 RF CHOKE 23 32 37 43 45 SOWV uF 20 8 8 FT 101 B PARTS D DIODE T TRANFORMER IF TRANSFORMER I Si 151555 X CRYSTAL a Zener 2090 1 HC 6 U 3178 SKHzUSB _ R RESISTOR 2 HC 6 U 3181 SKHz LSB CARBON FILM 3 HC 6 U 3179 3KH2 CW AM 34W x 4W REG amp CALIB UNIT NTED CIRCUI PB 1314 A Z 1 HW Q TRANSISTOR amp IC xw 3 TR 2SC73SY ES 4W MFC 6020 1 5030 4 gt KW D DIODE E E 2 4W Si 181555 5 7 14 17 20 w 100 1 VR
77. ANSFORMER COMPARTMENT PB 1077 FT 101 EARLY Serial 025000 amp down POWER TRANSFORMER COMPARTMENT PB 1182 PB 1181 FT 101 LATE Serial No 025001 amp up 5 3 BOARD LOCATIONS DC AC INVERTER PB 1314 POWER HIGH TRANSFORMER VOLTAGE PE en ERE COMPARTMENT PB 1315 PB 1344 PB 1183 PB 1181 FT 101 B PB 1314 2t HIGH VOLTAGE PB 1292 TRANSFORMER COMPARTMENT 1180 PB 1534 PB 1181 FT 101 E EE EX 5 4 INSNVHL 3 1393 ESYA Y31418V19 01 h 92 LINN Y3XIW 40 LL Nid OL xoef OJA 1X3 30 L 9 9419 pue 193135 30 VpS ok OS V 31419 ZH30026 0048 a 3344n8 333309 9S0 03 100 03 AZLEOSZ 3961152 3961452 0 20 10 HOLIMS 123135 OJA OvS OL 3931 SLIOA 9 10 39018 4 9501 9d O4A 5 5 VFO UNIT PB 1056 A Z VFO UNIT 29 055 fo 1 1 1 ES 2SKI9GR 02 2SKI9GR 03 2SC372Y osc Burr gurr UNIT 1056 C 13 SOILS I9310VHVHO 4YOMLIN 3317113 SSVdONVB uVu 119130 11 3A1303Y HOLIMS amp 1037135 04A WvS Y WON OJA TVN5IS 114100 OJA INV CLLIWX U OND 2110209 026 6m 911051 01 LINX NI SVIG TVWHON 3A31933 NI OND
78. C 16WV 10004F 1 ad XF 30A WV 1004F __ 25WV 1000xE CRYSTAL SOCKET 150WV 22uF 1 514 2P 250WV 224F R RESISTOR TRIMMER CAPACITOR 23 CARBON FILM 4W 562 CERAMIC 12 50 40 SOPF 2 4W 1000 Z 1 AW 4702 INDUCTOR vm 7 AW 1KQ RF CHOKE AW 2 2KQ 4W 3 3KQ UW 10KO HC 13 U KW 100KQ POTENTIOMETER V10K8 1 2 500B VIOK8 1 2 51PF SRAMIC DICS 50WV _ 20PF CH _50WV _ 27PF CH 50WV 100PF CH 1 3 5 8 10 14 50WV 9 014F 16 18 20 22 25 27 28 21 _ 50WV 0 0474F TC TRIMMER CAPACITOR 1 2 ECV 1ZW20P32 20PF 3 _TRANSFORMER 11 21 22 z 1 3 12 4424 1 pA _ 23 YW 3 2 10 4W 2504H 5 7 14 17 20 4W 2 2704H a 3 FIX OUT 00054 VR VARIABLE RESISTOR 1 TRUR 10KOB PRINTED CIRCUIT BOARD 1056 2 CAPACITOR 25 TRANSISTOR 1 50WV 3PF 3 25 372 12 _ FET 2SKI9GR 50WV 50WV 50PF D DIODE 50WV 100 1 tor 152236 x 50 130PF 5 10 CERAMIC DISC 50WV 0 01 R RESISTOR 14 17 19 20 24 25 28 29 4 7 CARBON FILM 4W 1002 T 5 9 0474 10 4W 2702 ELECTROLYTIC 16WV 1 3 6 4W 3302 pe 8 AW 8 2KQ TC TRIMMER CAPACITOR 1 14W 10KQ 1 4 CERAMIC EC
79. C GAIN contro round knob varies the audio level from the mi crophone amplifier stage The control has sufficient range to permit the use of any high impedance crystal or dynamic microphone Both controls have maximum gain with the control set at 10 full clockwise 10 PLATE Tunes the transmitter plate circuit of the final amplifier to resonance at the desired output frequency 11 LOADING Tunes the output leg of the pi network to match antenna and feed line impedance A POWER Main switch turns transceiver ON for both AC and DC operation B HEATER With this switch in the down position the transmitter tube heaters are turned off This reduces current drain to 0 5 amp when mobi le and thus permits long periods of listening without excessive battery drain Pushing the rocker switch to the upper position provides supply voltage to the tube heaters After a 30 second warm up the transmitter is ready for operation This switch operates in both DC and AC modes C MOX PTT VOX FUNCTION SWITCH This switch selects desired transmitter mode for both microphone and key operation MOX Manual transmit switch position Locks transmitter ON and must be returned to PTT position for receiver recovery PTT Push to talk Locks transmitter ON when microphone switch is depressed Receiver recovers automatically when microphone switch is released Voice operated transmit or semi break in operation This switch po
80. CHANGE FTV 650 ALC CHANGE Flg 3 9 ye 601 3O0 O js YC 601 Cable A Fig 2 FV 101 Cable 101 FT 101 601 4 2 601 Cable A Cable A Blue White Brown Coax Cable 1 50 2V Black Cable B Fig 3 10 3 11 FTV 250 FTV 650B Fv 101 Te E m 2 BRE F200 2277 997 TRIP 2M 6M HF vro 5 o 00000 00 THE 100 FT 101 The YO 100 hookup varies depending on the particular application in volved The instruction manual is somewhat hazy in it s descriptions of how to go about various setups so a few words are required to clear up the questions The YO 100 set up to monitor the FT 101 s transmitted signal when trans mitting and display the received signal when in the receive mode is the most common setup and should be wired in as shown in Fig 3 14 NOTE Modification of the board is necessary on all FT 101 versions The IF OUT jack does not provide enough signal to the YO 100 to provide adequate deflection FT 101 MODIFICATION Chemical Condenser Use coax cable 1 5D2V or 1 7C2V Insulate to prevent shorting to board ircuitry vel Fig 3 12 3 15 The received pattern may not be identical to the t
81. FC 75 B 1 2 MP Capacitor 1 uF 220VAC none pola 1 ea 3 Plug 4 pin 1 ea 4 Packing 1 ea 5 Washer 8 6 Screw M3 x 10 4 ea 7 Insulating Tube 1 m m 10 cm 8 Insulating Tube 4 m m 20 cm INSTALLATION 1 Capacitor Open a top cover of the transceiver Then remove 3 screws on the top cover of final compartment Remove top cover of the final compartment and locate a socket on rear panel Use 1 m m insul ating tube for capacitor leads and solder the capacitor as illus trated in Fig 6 29 INSIDE REAR PANEL FIG 6 29 6 26 2 Power Plug Insert four wires into 4 m m insulating tube Solder these four wires to the plug supplied as illustrated in Fig 6 30 YELLOW YELLOW GREEN RED FIG 6 30 3 Fan Motor Remove four screws from a slit cover on the final compartment of rear panel Install the fan into the hole as illustrated in Fig 6 31 Insert the power plug into the socket The fan will activate when the power switch is turned on for AC operation and when both power and heater switches are turned on for DC operation FIG 6 51 PARTS REQUIRED 1 Fan Motor Assembly 2SB 10A 2 4 pin Plug 3 Packing 4 Washer 5 Screw M3 x 10 6 Vinyl Tube INSTALLATION COOLING FAN INSTALLATION FT 101E EE EX 100V FAN 1 ea 20 cm Cut a leac from the motor to appropriate length 10 20 cm insert two leads into vinyl tube Solder these leads to the plug su
82. FILM 1 6 TR 25 372 4 7 xw 100 Q 10 4 TR 2SC7S4R 10 MW 70 Q 2 355 FEU 2967958 ZJ X5 s E NW FT 101 B PARTS 1 xw 10 KQ gt 10 1 3 8 11 13 Si 151555 D 22 1022 14 Si 1512 E 25 3 3 W 100 KO 102 9 Zener WZ 090 CARBON COMPOSITION R RESISTOR TLS w 1 10 CARBON FILM 48 Kw 220 10 22 HW 330 10 x E 470 Q 1022 1 26 63 560 0 1022 C CAPACITOR 64 65 68 1 0 10 DIPPED MICA 50 1 SK 10 20PF 210 70 3 3K9 10 100 1025 61 64 47 9 1022 _ SOWV 6SOPF 10 5 6KQ 10 SOWV 1000PF 10 0 1095 SOWV 2000 10 4 10 CERAMIC DISC CARBON COMPOSITION SOWV 0 01 uF SN 10 Q 10 500wV 0 01 uF Tz 56 Q 107 CERAMIC TC 100 02 10 750 750 750 NPO 0 5 ____470 10 _ NPO 10P F 1022 580 Q 1075 NPO 2PF 10 7 VC VARIABLE CAPACITOR AIR 521 112 TC TRIMMER CAPACITOR AIR TSNISOC3O0PF p AIR TSNI7OCIOPF x lt 2 L INDUCTOR OSCILLATOR COIL RF CHOKE RF CHOKE CARBON FILM Ww 470 METALIC FILM 3 SW 220 2 10 APACITOR CERAMIC DISC _ C CAPACITOR DX 47 5 sw 1 s w 18 10 WIRE WOUND METER SH INT VR VARIABLE RESISTOR EVCBOQS
83. G THROUGH FT 101 NOISE BLANKER CIRCUITS s ALG OPERATION 45 322 2422404 ALC TROUBLESHOOTING we ADVICE ON TROUBLESHOOTING THE FINAL DRIVER FINAL AMPLIFIER NEUTRALIZATION FAULT TREESRX ETD 3 aucti AV NE 1e 2 9 FAULT AREE S aret 101 CHASSIS VOLTAGE CHART FT 101 CHASSIS RESISTANCE CHART FT 101B E EE EX CHASSIS VOLTAGE CHART FT 101B E EE EX CHASSIS RESISTANCE CHART BOARD AND TUBE VOLTAGES BOARD LOCATIONS PARTS LOCATIONS BOARD MODULE COMPLEMENT BREAK IN POINTS OF PCBA CHANGES BOARD LOCATIONS te ce VFO UNIT PB1056 A FUNCTIONAL BLOCK DIAGRAM GB SOGHEMATIO gt 45 Won lige C PARTS LOCATION as amp ec 5 a MIXER UNIT PB1180 1182 A FUNCTIONAL BLOCK DIAGRAM SCHEMAPIC SI E te SL se 0 PARIS RF UNIT 1181 A FUNCTIONAL BLOCK DIAGRAM BI SCHEMATICS 23 ce Rue nma f CY PARTS LOCATION sey al 27 4 LOW FREQUENCY IF UNIT PB1183 A FUNCTIONAL BLOCK DIAGRAM B SCHEMATIC Vs ov os Ie o de CQ PARTS LOCATION 6 8 ROCA MODULATOR UNIT 1184 FUNCTIONAL BLOCK DIAGRAM a CB SCHEMATIC 92 0 5 IG PARTS EOCATION mun 3 NOISE BLANKER PB1292 UD SCHEMATIC 5 5 GY A
84. IVER COIL A 104 ANT COIL B 105 DRIVER 106 GRID 107 5MHz TRAP 111 OSC COIL 115 3 18MHz TRAP I TRANSFORMER amp CHOKE COIL 11 ROWER TRANSFORMER 12 AF CHOKE 20m 0 5 F FUSE 1 SA 100 117V 3A 200 234V DC 20A FH FUSE HOLDER 1 AC 5 1001 2 DC 5 1102 PL RELAY 1 171 42 2 2 5 SWITCH 1 ROTARY RSI3 13 1 BAND 2 ROTARY ESRE365R20Z MODE 4 ROTARY ESRE246R20Z SELECT 6 SEESAW WD2101 POWER 5 SEESAW WD2301 HEATER 3 10 11 SLIDE 51 12201 7 9 SLIDE SLE12301 x CRYSTAL 1 80M HC 25 U 3 52MHz 2 40M HC 25 U 13 02MHz 3 20M HC 25 U 20 02MHz 4 15M HC 25 U 27 02MHz 5 11M HC 25 U 33 02MHz 6 10M A HC 25 U 34 02MHz 7 10M B HC 25 U 34 52MHz 8 10M C HC 25 U 35 02MHz 9 10M D HC 25 U 35 52MHz 10 JJY WWV HC 25 U 16 02MHz 11 160M HC 25 U 7 52MHz 8 16 Jii REC JI AF IN PHONES T Tx se 1d v saatei 217 sive Tone mg ar 4 OT PRLS 2 L I 2 o 8 OFF ON D Q Di ul 9 Ho ert 8 e 8 8 E 5 E 8 i 08 goo RIS us C J7 IF OUT 21 1 Bottom
85. MAINTENANCE SERVICE MANUAL FT 101 SERIES YAE SU 41 P3 gt California 90701 YAESU 22 The NETHERLAND ra pete 101 MODEL 5 1NDEX CONTENTS GENERAL INTRODUCTION e A BRIEF HISTORY OF THE FT 101 INSTALLATION NOTES NORMAL TUNE UP ABBREVIATED TEST SETUP FOR SERVICING CRYSTAL INFORMATION SOLDERING DESOLDERING TECHNIQUE ON PCBA S CIRCUIT TRACE REPAIR PARTS IDENTIFICATION THEORY OF OPERATION PLUG IN MODULE CIRCUITS RECOMMENDED ACCESSORIES OPTIONAL ACCESSORIES OPERATING INFORMATION CONTROLS AND SWITCHES REAR APRON CONNECTIONS FREQUENCY SELECTION NORMAL TUNE UP ANTENNAS 2 2 2 ASSEMBLY I NTERCCNNECT ON OUTER COVER REMOVAL FRONT PANEL REMOVAL MAIN DIAL ASSEMBLY SWITCH PANEL ASSEMBLY PILOT LICHT REPLACEMENT VFO REMOVAL INTERCONNECT IONS BETWEEN 101 a FV 101 SP 101P FL 20008 or FL 2100 b MICROPHONE WIRING e a c FTV 650 WITH NECESSARY WIRING CHANGES d YC 601 FV 101 e FIV 250 6508 f FV 101B SP 101PB Fl 21008 ga ERATION o 3 2 2 2222 oz PAGE 1 00 gt D N OR INDEX cont d CONTENTS LOCALIZING TROUBLES IN THE UNIT FAULT IDENTIFICATION AND LOCALIZATION SIGNAL TRACIN
86. Microphone Jack A four pin connector is used for microphone input and push to talk relay actuation J METER Selects the meter mode to read PA cathode current 1 C rel ative power output PO or ALC feedback voltage Lower meter scale is cal ibrated O 500 ma Example 25 250 ma REAR APRON CONNECTIONS AND CONTROL j i le e c a b dk f h REAR APRON CONNECTIONS a AF IN Audio input jack for auxiliary station equipment An FM detec tor unit or a high impedance microphone may be applied at this point for audio output from the transceiver speaker for mobile PA paging b IF OUT 3180 kHz IF signal is available from this jack for use with other station equipment such as panoramic adapter YO 100 etc SP Audio output is provided at this jack for an external speaker Output impedance is 4 ohms and the internal speaker will be disabled when plug is inserted d PTT This jack may be used for external actuation of the transmitter For example a foot switch may be inserted into this jack to provide hands free control of the transmitter PTT relay e PATCH Speech input terminal for phone patch connection Impedance is 50K ohms Can also accept AFSK tone inputs for RTTY facsimile or Slo Scan f REC This jack is connected to the receiver output 4 ohms to be used for phone patch or other use Also iF be used to supply input to ATV or RTTY converters 9 TONE Sidetone output for external monit
87. OX amplifier Q4 for semi break in CW operation 1184 Fig 1 15 MODULATOR UNIT PB1184A The Modulator Unit contains the carrier oscillators the ring modula tor circuit for SSB and AM modulator The carrier oscillator oscillates either 3178 5 kHz for USB or 3181 5 kHz for LSB depending upon whether Q3 25 372 or Q5 25 572 is selected by the MODE switch MODE switch opens the emitter circuit of the transistor that is not in use The output from the selected oscillator is fed to the buffer amplifier Q4 2SC828P and then to the balanced ring modulator 01 04 The RF carrier signal is also fed to the ring demodulator from pin 6 for receive These crystal fre quencies are matched to the bandpass of the crystal filter to place the car rier frequency approximately 25 db down on the skirt of the filter response For AM and CW operation the 3179 3 kHz crystal controlled oscillator Q6 2SC372Y operates to produce the carrier signal and both 05 and Q5 disconnected Q2 2SC372Y operates as a modulator for operation and as a buffer stage for CW operation The speech signal is fed to the balanced ring modulator and AM modulator Q2 from pin 9 Carrier balance is obtained by a potentiometer VRI and a trimmer citor 1 The resulting double sideband suppressed carrier output from the balanced modulator is amplified through T110 by the IF amplifier Q1 25 19 and fed to the low frequency IF unit from
88. R INSTALLATION 6 17 HUM PROBLEMS IN EARLY 101 6 20 HUM PROBLEMS IN LATER FT 101B E EE EX 6 21 NOISE POP MODIFICATION gt a se 2 6 23 MODIFIED FAN HOOKUP 255 i iia 0 6 24 PB1582 NOISE BLANKER MODIFICATION 6 25 FAN INSTALLATION FOR FT 101 FT 1018 220 FAN 6 26 FAN INSTALLATION FOR FT 101E EE EX 100V FAN 6 28 MODIFICATION FOR FSK OPERATION 6 29 POWER TRANSFORMER CONNECTIONS 06230 MODIFICATION FOR NON STANDARD FREQUENCIES 6 31 INSTALLATION OF RF PROCESSOR INTO FT 101EE EX MODELS 1534 Prior to starting installation check the serial number of your trans ceiver The method of installation is slightly different for rigs bearing serial numbers higher than 150001 For rigs bearing serial numbers higher than 150001 only and m are required since the balance of the parts are already mounted in place PARTS REQUIRED FIX RF Processor Printed Board PB1534 assembly tested 1 ea b Potentiometer 1K ohm B 10K ohm B 16 mm 1 Carbon Resistor 10K ohm 1 4 watt 1 ea d Knob FT 25S 3 5 mm ea e Lever Knob A 1 ea f Coax Cable Yellow 1 5 D2V 45 cm g Mire White Orange 0 5 mm 60 cm h Wire White Yellow 0 5 mm 45 cm i Wire White 0 5 mm 40 cm j Wire Black 0 5 mm 25 cm Vinyl Tube 3 mm 10 cm 1 Vinyl Tube 1 mm 2
89. RANSCEIVER WITH COVERS REMOVED AND THE POWER IS ON DISCHARGE ALL CAPACITORS BY SHORTING TO GROUND AFTER REMOVING THE POWER TO AVOID BEING SHOCKED BY A FULLY CHARGED CAPACITOR WHEN YOU LEAST EXPECT DANGER The transceiver was carefully aligned and tested at the factory nowever service or replacement of major component may require subse quent realignment Don t begin a realignment however unless the oper ation of the transceiver is fully understood the malfunction has been analyzed and definitely traced to misalignment Service work should be performed by experienced personnel using the proper test equipment however carefu reading of this manual will usually result in a successful job Capacitors resistors inductors and transformer adjustments should not be varied more than a few degrees in either direction from their orig inal setting If the adjustments require varying by an appreciable amount Check for the presence of a defect other than alignment NEVER OPERATE THE TRANSCEIVER IN THE TRANSMIT MODE WITHOUT A MATCHED ANTENNA OR ADEQUATE DUMMY LOAD THE POWER AMPLIFIER TUBES AND NETWORK COMPONENTS CAN BE DAMAGED IF THE TRANSCEIVER 15 OPERATED WITH OUT THE PROPER LOAD TERMINATION EQUIPMENT REQUIRED 1 RF Signal Generator Hewlett Packard Model 606A or equivalent with one volt output at an impedance of 50 ohms and a frequency coverage to 30 mHz 2 Vacuum Tube Voltmeter VTVM Hewlett Packard Model 410B
90. RELAY 132 600P F 10 1 AE3171 42 CERAMIC FEED THRU 2 2 30 32 34 35 37 39 40 SOOWV 0 00IuF 67 68 84 110 PLASTIC FILM S SWITCH 140 141 SOWV 0 047 20 L 1 ROTARY RS13 13 11 BAND i SOWV 0 22 uF 209 1 y ROTARY ESRE365R20Z MODE 49 SOWV 0 47 wF 20 4 ROTARY ESRE246R20Z SELECT METALIZED PAPER 6 SEASAW WD3001 POWER _ _ 160WV 22 20 SEASAW WD320 HEATER 145 220VAC x19 SLIDE SS F22 08 lt ELECTROLYTIC 7 9 SLIDE SS H23 08 142 146 16WV 54 144 16WV 10uF re I6WV 1004F 6 16WV 2204F I 109 450WV L24F Iu i SOOWV 1004F x 1 5 __ VC VARIABLE CAPACITOR 3 20M HC25 U 20 PLATE AIR RTISB3O0VC 300PF 4 IM HC25 U 27 LOADING AIR C123A129 5 25 33 TC TRIMMER CAPACITOR 6 MHC2S U 34 CERAMIC 7 I 34 _ECVIZWI10P32 8 HC2S U 35 ECVIZWSOP32 _ MICA B ipY HC2S U 16 02 _ 2 _ HC 2s U B 7P AIR TSN 150C 2 10 3305 018 011 3305 014 011 14 3305 010 011 10 _ 2 4 CHOKE _ 3 CHOKE PLATE 5004H CHOKE 16 0 15 _ _ 3 WS600 64 1 2 TES ER I EL
91. SEMBLY DISASSEMBLY FRONT PANEL NOTE Use 8 box or pan so all the hardware will stay together and be there when re assembly time comes After you have taken off all of the covers remove the 12 flat headed Phillips screws holding the trim ring in place set the rig on the bench with the front hanging slightly over and gently work the trim ring loose Remove and store Careful it warps easily if you twist it too much Next remove the knobs beginning with the main dial assembly which will give you no trouble if you study Fig 3 3 and see how it goes together and comes apart Remove the shaft nuts as shown and unsolder the leads to the micro phone connector and the pilot light Don t lose the bearing from the load control shaft as so often occurs Put it into the box with the nuts washers and knobs Remove the plastic film protector if it s still in place You should now be able to gently detach the painted panel revealing the screws for the switch deck see Fig 3 4 Fantastik or 409 deter gent makes a nice clean panel if it looks grimy from use A3NVd 944 wos 03AOW3H Y Q3193NNOOSIQ 94 4snu SAJAT S3NOHd Y 21 3101 14 7 Sl pou uo HOLIMS eJ 13 4 4 844 o1 3ION HOLIMS ONVE SS gt p 193136 04 21 gt Q on Q 209 Y 76 6 913 NI N33S ZE 914 38 NVI ASSV VIO
92. SHOOTING THE FINAL AND DRIVER FT 101 SERIES There are only three tubes in the FT 101 12BY7 driver and two 64560 finals run in parallel Since not all service personnel are as familiar with tubes as they are with semiconductors we will begin by cautioning you that tubes are voltage devices and to produce power in useful amounts they require voltages well in excess of that needed for solid state devices Use care or you will quickly develop serviceman s elbow a malady known wel to old timers who often de veloped a colorful vocabulary to go with the sore elbow that developes when your arm jerks back from the 600 volts right into some nearby immovable ob Ject While seldom fatal it is not an experience one knowingly encourages The three tubes are all biased to operate Class B providing a linear reproduction of the RF applied to the grids through utilization of the par allel tuned plate circuit to restore the missing half cycle of each voltage excursion Excessive bias will move the operating point into Class C and produce distortion generally referred to as flat topping and caused by the RF peaks being clipped thus producing undesired combinations of frequencies Insufficient bias will not cause distortion but wil produce excessive heat since the tube approaches 8 Class A condition and it s sensitivity Increases to dangerous levels in some cases the tube will take off go into Class C and act as a high po
93. SLLIWS 60 1 919 612 331114 SSVd 39 8 2501 e eJedes ul pueey se zH 00876 uo Bul44usueJ ueuM OvS c 4e eub s Unululu 10 495 801 0811 8d 1 3 WOU 15 0 INN 713431 8 252 W3XIW puz 219 0209 0266 9 9 LOVLNOO 21 1 14 Av138 OLT iy 1081N09 _NIV9 39 Would WO 30 94 _g_HOLIMS INV WOW 938 9 9 SWYA 07 pad dL NIS 4961352 Z801 081 1 84 1 51 a 81 1 8d JAIXO Vd BIXIN 6 LINn AON3n 3HJ 41 44 5 00A WOY NVd9V10 52018 TVNOILONnd 1811 44 LINN 34 HIGH FREQUENCY RF UNIT PB 1181 A Z ki Q3 2SC784R cx 2 o 85 Xa amp Ne 3 o 9 gt S al Qu N x No Ka a 585 NS 5 NBO 7 51 az sy Toe Ci Wein 1 Signo ievel 18 TIRNEIS 8b iv Awoq 1 88 21 du are AL wm ter 3 Viewed From Solder Side Viewed From Component Side 5 12 JOq3STSad 6 OU 4670 950 1 201 LINN dy 1811 qd
94. SPECIFICATIONS Frequency Range 1 8 mHz to 200 mHz Impedance 50 ohm unbalanced Power Scale 0 6 watts 0 30 watts 0 150 watts VSWR Less than 1 2 at 145 mHz Maximum Error Within 10 of maximum scale Size 104 W x 153 x 280 D m m Weight 2 Kg DIGITAL DISPLAY 742508 Loe 4 vagsu Yc 6o1 Fig 1 32 YC 601 DIGITAL DISPLAY The mode YC 601 displays actual transmit and receive frequencies on six bright green colored digital display tubes All amateur bands are switch selected for complete frequency readout with 100 Hz accuracy The power supply is built in Conn cable is supplied with the unit SPECIFICATIONS Display 6 digits 100 Hz re Clock Oscillator 1 31072 mH Gate Time 0 1 sec Ambient Temperature 09 C 409 C Power Source 100 110 117 200 220 234 VAC 50 60 Hz Power Consumption Approximately 10 VA Size 220 W x 80 H x 2 D m m Weight 2 5 Kg Fig 1 33 250 2 METER TRANSVER SPECIFICATIONS General Frequency Range 144 to 148 mHz Mode SSB AM CW and FM Size 210 W x 153 H x 285 D m m Weight 6 Kg Receiver Sensitivity 0 5 uV for 20 dB noise plus signal to noise ratio when used with our transceiver Input Impedance 50 to 75 ohms Input Frequency 28 to 30 mHz Harmonic and Other Spurious Res Internal spurious se Image rejection better than 50 dB gnal below equivalent to antenna input Transmitter Input
95. Side Viewed From Component Side 5 22 9 4 U 6 2 4 2 9 1 5 1 1 e u 1 0 2 2 1 91 viel add YOLVINDI AIMO 11 8 02 2 21 91 8 vind 81 1 3 SI S178 5 25 3413034 A 5 51 91 1 ddns YIMOd ys rams OA NI aV OL 1 205 MS 3408 OL 71800 AV 3d 1802 3 18952 61352 890001252 ES 6 995 04 SXOVf 3NOHd Z dens c ce 325 30 Nid INY OL 3 3015 XOA 545052 A130 WZvOL VL XOA ZA 91 y ONV LS OL d 245 MS 3008 01 L 21 dn 611564 LINN g AZL amp OSZ AZLSOSZ 89613SZ _Syovf Holyd 2S0 00H OL z 10 ONY OIN OL 39018 1 3 84 OIANY AUDIO UNIT PB 1315 A Z QI 2SKI9GR 02 2SC372Y 03 25 372 04 TA 7042M 05 25 9 06 25 373 ic Aue AME EF vox ame RELAY CONT Viewed From Component Side Viewed From Solder Side 5 25 UNIT 1315 R X lt RF SPEECH PROCESSOR CRYSTAL CONTROL UNIT PB 1494 Viewed From Component Side Viewed From Solder Side 5 27 11 0 1 5 1 21 2 21 6 1
96. UPPRESSION UNWANTED SIDEBAND SUPPRESSION SPURIOUS RADIATION TRANSMITTER FREQUENCY RESPONSE DISTORTION PRODUCTS ANTENNA OUTPUT IMPEDANCE FREQUENCY STABILITY SENSITIVITY AUDIO OUTPUT POWER CONSUMPTION WEIGHT DIMENSIONS 3 5 30 mHz amateur bands 80 10 m 26 9 27 5 mHz CB 10 10 5 mHz WWV USB or LSB selectable CW or AM SSB 260 watts PEP CW 180 watts 507 duty cycle AM 80 watts slightly lower on 10m 50 dB 50 dB at 1000 Hz Down 40 dB or more 300 Hz to 2700 Hz 3 dB Down 30 dB or more 50 75 Ohm unbalanced Less than 100 Hz drift in any 30 minute period 0 3 microvolt S N 10 dB 5 watts AC Rx 35 watts Tx 300 watts DC 12V standby 0 5 amp transmit 20 0 amp 30 Lbs 134 x 6x 114 Each transceiver shipped is normally accompanied by an Instruction manual a set of accessory plugs a high impedance 50K dynamic hand mike and two cables one for AC operation the other for DC power hookup The exception 15 the FT 101EX which has no DC capability although it can be added by installing the DC unit The installation of the DC 1 is also covered in this manual These specifications differ from the latest issue FT 101E series only in the frequency range which now includes the 160 meter band so the owner of a vintage Yaesu FT 101 should not feel he was obsoleted too badly along the way but newer FT 101 s did include major circuit improvements For example Yaesu engineers develo
97. VARIABLE RESISTOR R RESISTOR d x TRIIR _ CARBON FILM 21 CAPACITOR xW 100 DIPPED MICA 1 W 470 5 1 sowv 3PF 0 SPF W 56 13 sowv 1PF 680 010 3 9 16 18 SOWV 30PF 10 y SOWV SOP F 10 SOWV 10 sowv 10 RAMIC DISC 5 10 14 17 19 20 24 SOWV OOluF 5 25 28 29 6 SOWV 0 047 uF ELECTROLYTIC 16WV TC TRIMMER CAPACITOR CERAMIC 1 ECVIZWSOP40 SOP F a _ L INDUCTOR 2 _ RF CHOKE 250wH 5 ImH C CAPACITOR T TRANSFORMER DIPPED MICA 119 IF TRANSFORMER 124 7 sowv 107 5 10 Sowv ED CIRCUIT BOARD PB 1344 A Z 1 SOWV 100PF Q FET 2 50WV 250 10 1 FET 2SKI9GR 3 SOWV 2000 10 D DIODE CERAMIC DISC Li Varactor 15145 46 SOWV 0 01 nF 1 R RESISTOR PLASTIC FILM CARBON FILM SOWV 0 00IwF ji AWO 56 9 0 1 yw 100 Q 0 0474F T GW 100KQ ROL YTIC 1 C CAPACITOR 16Wv 1000 DIPPED MICA __ 16WV 100 5 5 20P F 10 _25 1000 SOWV SOP F 10 150WV 22 1 CERAMIC DISC 250 22uF SOWV 0 01uF L INDUCTOR TC TRIMMER CAPACITOR CHOKE CERAMIC 1 ECVIZWS0P40 SOPF FIX OUTPUT COIL Q FET amp TRANSISTOR X CRYSTAL TR SC372Y 1 HC 13 U 100K Hz FET 2SKI9GR D DIODE 1 Varactor 1 PRINTED CIRCUIT BOARD PB 1292 A Z R RESISTOR Q FET amp TRANSISTOR CARBON
98. VIZWSOP40 E 4W 22KQ ie 2 5 4W 100K INDUCTOR 11 15 CARBON COMPOSITION ZW IKQ 2 RF CHOKE _ 2504H 1 3 5 RF CHOKE lmH C CAPACITOR FT 101 E EE EX PARTS 716 DIPPED MICA 50WV 20 6 67 EW 2 2K 8 10 50WV 100PF 2 4W 3 3KQ 1 2 50wV 650PF 44 W 4 7KQ 5 1000PF 19 20 W 5 6KQ 11 _50WV 2000PF 8 YEW 10KQ 7 9 12 15 CERAMIC DISC 50WV 0 014F 36 56 W 33KQ 3 5 13 500WV 0 014F 3 iw 47KQ 14 CERAMIC TC NPO 28 29 EW 470K 4 NPO 10PF 13 EW 19 NPO 82PF 10 11 IW 56 20 750 2 30 METALIC FILM IW 47K9 18 N750 5 3W 5 1KQ 17 750 20 40 1 5KQ 37 SW 18KQ VC VARIABLE CAPACITOR WIRE WOUND METER SHUNT 1 AIR BS21A112 VR VARIABLE RESISTOR TC TRIMMER CAPACITOR 3 EVKA2A10306 1 AIR 5 150 _ 6 EVHBOASISBI3 IKQB 2 AIR TSN150C10PF x2 1 EVKA2AF02314 5 2 EVKA2AF01339 5 INDUCTOR 4 TR 11R 5002B 1 OSCILLATOR COIL 2 4 6 7 RF CHOKE _ 2504H C CAPACITOR S RI1 RF CHOKE 123 DIPPED MICA 500WV 2PF 134 500W V 3PF RECTIFIER UNIT 28 500W V SPF PRINTED CIRCUIT BOARD PB 1076 A Z 1 16 98 107 500W V 10PF D DIODE 44 500W V 20PF 5 6 E Si 1S1942 97
99. View VR6 PO ADJ V2 V3 Qt CATHODE Sio MAIN CHASSIS SIGNAL AND CONTROL WIRING 134 5 UNIT MJ 4 gt d e se s 554 01 2 EF 04 z 2sc372Y 25 372 TA 7042M 25 828 25 828 lt O7 510 252373 28 8280 l l _ m RE A NOTES Al L RESISTORS ARE IN 14W UNLESS OTHERWISE NOTED 2 ALL CAPACITORS ARE IN uf UNLESS OTHRWISE NOTED 3 ALL ELECTROLYTIC CAPACITORS 2 ARE 16WV UNLESS OTHRWISE NOTED 4 VALUE IS NOMINAL FT IOIE CiRCUIT DIAGRAM NEN avez 227 Ss ig 4 7 052 021 01 25 372 x BOSC UNIT PB I292 N B UNIT Q2 2SKI9GR MJ 5 4PB 1I84A MOD 05 2Sc372Y Q2 2SC372Y 25 828 AM CW Q6 2SC372Y 5 13K 22 wasa took jook 06 DS 204 Q3 2SC784R TRANS 2nd ay 3s gt Mar f MJ 2 MJ 1 8 FB IBOB 10828 MIXER UNITJPB4I66 PB IIBIB RF UNIT _ QI 25 372 re eame MIX i
100. WV 160 PB 1292 Fig 1 21 FRONT Fig 1 22 NOISE BLANKER UNIT 1292 The 5180 kHz output signal from the receiver 2nd mixer is fed to the base of IF amplifier 01 250372 through pin 4 and T116 The signal is then fed to the gate of the IF amplifier Q2 2SK19GR through the noise blanker diode 01 151555 I is then fed to the IF amplifier chain in the low frequency IF unit PB1183 through pin 1 The above 3180 kHz signal is also fed to the gate of noise amplifier Q3 25 196 and amplified through 93 and Q4 2SC784R Pulse rectifier diode D3 151555 conducts with the noise pulses in the output from Q4 and negative output voltage from the diode is applied to the gate of Q5 2SK19GR in order to turn off Q5 The noise blanker driver Q6 2SC372Y conducts to switch the noise blanker diode D1 which opens the input circuit of the IF amplifier Q2 whenever a narrow noise pulse exists The switching level of the diode D1 is set by the noise blanker thresh old control VRI At the most effective blanking position there may be slight distortion on the received signal due to mixing at the switching di ode This effect can be reduced by adjusting the threshold control slightly P8 494 FIX 8 RF PROCESSOR E E m m mine te a0 n PB 1494 i L r Css Fig 1 23 RF PROCESSOR PB1494 The s
101. X5 33 02 10 X 6 TC21 34 02MHz 108 ST TC22 34 52MHz we xe 7023 35 02MHz 10D 9 TC24 35 52MHz i il WWV xio 100 TC25 16 02MHz S METER ADJUSTMENT Use a signal generator with a calibrated attenuator such as the HP 606A matched to a 50 ohm unbalanced load Connect the signal generator to the antenna terminal and set it to 14 200 kHz with an output of 50 microvolts Tune the transceiver for the maximum S meter reading Adjust VR2 on PB11838 so the meter reads 25 over 5 9 Disconnect signal generator NOISE BLANKER THRESHOLD ADJUSTMENT PB1292 BLANKER The operating threshold of the noise blanker is set by VRI on the PB1292 board 1 is marked NB on most units Counter clockwise ro tation of the control increases the effectiveness but an extreme setting Will affect the sensitivity of the receiver so use judgement Switch on the calibrator and tune it in at 14 100 kHz peaking for maximum S meter indication with the noise blanker off Switch the noise blanker on and if the blanker is set properly the meter will decrease 1 2 to 1 S unit Adjust VRI to get the proper setting VOX ADJUSTMENT VOX controls are located PB1315A These VRI VOX Gain VR2 De lay VR3 Relay Sensitivity and VRS Antitrip Gain Set the operation switch to the VOX position and turn the AF GAIN and GAIN controls fully counter clockwise Slowly rotate the RELAY con trol
102. ad a somewhat improved rise time characteristic but It took a fine tuned ear to notice any change in effectiveness which was not too much at best FT 10 Late As a result of increasing mobile use the noise blanker was given consid erable attention and the result was creation of an entire new board PB1182 Since the new circuit was too large for the old board PB1080 and too small to entirely occupy the new the fixed crystal circuit was also added and the board configured to lie on top of the VFO assembly This incidentally is a simple and quick means of identification of late versions of the FT 101 This was not a plug in module as were later versions but had to be hard wired in to position FT 1018 E EE EX Early Mid With the major redesign that the B version represented an additional socket was added for the noise blanker in the space between the VFO and the chassis mounted filter capacitors This edge mounted board was designated PB1292 and was used in Yaesu FT 101B E EE and EX In August 1976 production runs of the FT 101E EE EX and thereafter a new blanker was developed and produced the PB1582 All the previous blankers had functioned at the 3180 kHz IF frequency however the new unit PB1582 used a 2725 Hz local oscillator and stepped the frequency down to 455 kHz for noise blanking ability and makes a fairly cost update of any FT 101 currently using the 1292 since the units are directly inte
103. ama masi zov dead P8 1079A ALL RESISTORS iN 710 UNLESS OTHERWISE NOTED 2 XVALUE i NOMINA FT IOI MAIN CHASSIS Lent s S an MZA 158 D 9 9 5 28 LY soo e 8 ul 3 5 3i 3 t 8 2 ie di S s Rand lao Sey AS M7 5 ca TH E R x ME 9 A 9 amp 3 Je ver spe Dl o f80 Sd 44 5 a _ 81811 84 27249 2 fa V3 PA 6JSecx2 Hrosz I 9LN MAIN CHASSIS FINAL AND DRIVER DETAIL 04 vox 7042 MJ 4 02 03 EF 2SKISGR Qi 1315 AF UNIT 1 Q5 RELAY 2SC372Y 25 372 25 828 2SKI 25 828 1 408 4n sua ntes 3 Eum g jS x 9 3 perc 4 5 dat Bed Gni 3 t 79 i HE 79002 112 mi men jo 5 xu Eer E 895 t x ane 520 zT o o ls m 7 i ji oke mw i
104. amplifier receiver audio ampli fier VOX amplifier and CW sidetone oscillator on transmit A speech sig nal from the microphone is fed to the first amplifier 01 2SK19GR FET from pin 5 Input impedance of the MIC amplifier is nominally 50K ohms The input microphone signal is controlled in amplitude by the MIC GAIN con trol which is between pins 3 and 4 The second microphone amplifier Q2 2SC372Y amplifies and is applied to the emitter follower 05 2SC372Y to be delivered to the modulator unit from pin 8 The received audio signel from the AUDIO GAIN control is applied through pin 19 to a pre amplifier Q9 2501000 and amplified by integrated circuit Q8 AN214 This stage in turn increases the signal to speaker level 1 18 The audio power amplifier circuit utilizes an output transformer less OTL circuit and can deliver 3 watts of audio output to the speaker through pin 22 In the VOX MODE the signal from the first microphone amplifier is coupled through the VOX GAIN contro potentiometer VR1 to VOX amplifier Q4 TA7042M The audio signal amplified by Q4 is then fed to the VOX recti fiers 103 and 104 151555 The positive DC output voltage of the recti fier is then applied to the gate of the VOX relay control transistors 05 25 19 and Q6 250375 causing them to conduct and actuate the VOX relay RL1 on the main chassis The collector circuit of Q6 is connected in series with RL1 through pin 13 and S7 T
105. as and feedline theory are not well understood by the owner it 15 suggested that the user get a copy of one of the ARRL publications Electronics Data Book Amateur Handbook Antenna Book etc and spend some time making his antenna system as efficient as possible CONTROLS AND SWITCHES The various front panel controls and their functions are described in the following section Be certain that you understand thoroughly the function of each control before assuming that the transceiver is mal tioning Frequently a new inexperienced owner does not take time to read the manual and more or less makes the unit fail 1 VFO SELECT SWITCH This switch provides optional selection of the companion FV 101B external VFO two fixed crystal oscillator positions or Normal operation of the transceiver using its internal VFO The switch should be placed in the INT position for normal internal VFO use INT INTERNAL VFO controls both transmitter and receiver frequencies RX EXT EXTERNAL VFO controls the receiver frequency and the FT 101 VFO controls transmitter output frequency TX EXT EXTERNAL VFO controls the transmitter output frequency and the FT 101 VFO controls the receiver frequency EXT EXTERNAL VFO controls both transmitter and receiver frequencies CH1 CH2 Provides crystal control of the transceiver on either of two spot frequencies within a band Proper crystals must be installed on PB1494 crystal oscillator board
106. cient in cancelling out pulse type noise a strong adjacent channel signal would create an IF overload situation and broaden the response unacceptably To correct this shortcoming a modification was developed to improve the AGC range of the board which then restored the FT 101E to its previous selectivity and retained its excel lent noise blank ing ability NOISE BLANKER PB 1582 3 180MHz 3 180MHz Signal Out gt Pulsed 2SC372 Gate 3 1 AGC Amp Modification pini Fig 4 2 ALC OPERATION The ALC action you see on your meter is a function of drive to the final grids V2 and V3 while biased and operating in a linear mode will not draw grid current until they are over driven by excessive RF peaks These ex cessive peaks are caused by normal peak voice passages or excessive mike gain Both conditions will cause grld current to be drawn which creates an AC voltage on the grid coinciding with the voice peaks This voltage is coupled out through capacitor C 17 to the ALC voltage doubler diodes D2 and D3 17 acts as a blocking capacitor which keeps the negative bias voltage from entering the ALC circuit Under peak audio a 1 5 VDC will be developed at the anode of D2 C 18 and R 13 form the ALC time constant controlling the rise and decay time The ALC voltage is then fed to pin 11 of MJ the MOD and OSC board where it controls the bias on 01 2SK19 IF amplifier This b
107. d 2 TU 8 mg D 5 ate 1 1 32 zs t oo ME LN 1 Js 13 wey bee Totes 8 BOW S CUN FE SEd 26 Bt E i s 5 2 E 5 5 2 H Tuta B n lt ung wie Woy S S ar ena 8 5 uan T 2 END n og 223 u 24 E mE A mii 42 57 3 gt z doom te x 2271 o m Q2 25 372 2SC828P 2SC372Y Q2 2SKI9GR 9 ia PAP TK genae 227 Hi 3e i 3 z d iy se 8 22 US Ba DS 2 amp 2 LUE ngel M 5 28 ta 8 5 3 j 288 q 8 D 4 8 PLS 1 1 2SKISGR 20555 Q4 2507848 ook TSK 25 372 1292 NB UNIT Q2 2SKI9GR 5 Q5 25 372 DHE 2
108. d capacitance point Adjust T104 for maximum audio output as described in step 2 T104 takes a nylon hex alignment tool and is held in position with wax See Fig 7 6 for t s location and don t forget to soften the wax be fore trying to turn it We see many cracked cores from absent minded servicement 11 12 15 17 18 Set the PRESELECTOR to the lower edge of the 80 meter segment VFO 3 500 kHz and adjust TC1 and TC6 for maximum transmitter power output into the dummy load Set the OPERATION switch to PTT and without changing the VFO or PRE SELECTOR settings tune the RF signal generator to 3 500 kHz and ob tain 1 000 Hz beat note Then adjust 11 for maximum audio output as described in step 2 Repeat steps 9 10 11 and 12 peak out the coil adjustments for optimum on the 80 meter band Set the BAND switch to 40 VFO at 7 000 kHz and the PRESELECTOR to the lower edge of the 40 meter segment Adjust TC2 and TC7 for max imum transmitter power output into the dummy load Note your set tings because you will have to come back to them in step 16 Set the VFO at 7 150 kHz and PRESELECTOR for maximum power output Adjust L33 for maximum power output Into the dummy load Set the OPERATION switch to PTT and set the VFO and PRESELECTOR settings to the same position as step 14 tune the RF signal gener ator to 7 000 kHz and obtain a 1 000 Hz beat note Adjust 12 for maximum audio output S
109. d the chassis Insulate the cut end and push i out of the way 2 Solder a 5 6 ohm 5 watt resistor between the left pilot light socket and the heater switch See Fig 6 22 3 Add a 1000 uF 25wv between T12 and ground as shown in Fig 6 25 Replace the covers and check it for hum level should not be greater than 10 with the volume control at minimum 6 21 POWER SWITCH BLUE WIRE BLACK WIRE HEATER SWITCH SELECT SWITCH SCONNECT HERE FIGURE 6 22 POWER TRANSFORMER FIGURE 6 23 6 22 MODEL FT 101 PROBLEM Loud pop when returning to receive mode IF UNIT MODIFICATION PB1183 _ 2507848 Add OluF disc Add 47uF 16WV Remove this capaci tor The above modification to 101 IF module achieves limiting of noise pulses created in some units during the transition from transmit receive and vice versa MODIFIED FAN HOOK UP FT 101 B E FAN NO FC75B FAN SOCKET 3 SOT ROE ANT RELAY 13V DC POWER TRANS FIG 6 25 TO 117 V Note Fan will operate only when transmitting NOISE BLANKER MODIFICATION Oluf 0 Solder wire low A XYTAL DO NOT UNSEAL ACCIDENTALLY COLLECTOR EMITTER BASE FIG 6 27 FIG 6 26 250372 1582 FIG 6 28 Solder to capacitor lead 3 4 56 7 83 10 6 25 FAN INSTALLATION FOR FT 101 1018 220V FAN PARTS REQUIRED 1 Fan Motor Assembly
110. e Built in R F Speech Processor Reliable easy to operate lever switch Adjustable carrier level for tune up and novice operation Built in speaker High Q permeability tuned RF stages to provide the performance required even in base station operation Includes dynamic hand held type microphone Indicator lights for internal VFO and clarifier operation Eight pole SSB filter for unparalleled selectivity on today s crowded bands All mode operation SSB CW AM Builtin interna crystal control provision and Dual VFO adaptor Complete line of compatible accessories for flexible sta tion design INSTALLATION NOTES The FT 101 was designed to operate primarily as a desk top unit how ever addition of a mobile mounting and a cable plug change will allow it s successful use as a highly effective mobile unit Two pre wired plugs are furnished with each unit one for AC the other for DC use The DC cable wire is red positive black negative The connector itself should be substituted only with great caution since the pin numbering of Cinch Jones and other USA version connectors Is different from the original Yaesu supplied assembly The USA connector ver sions will fit but great care should be used in the wiring Should you encounter a transceiver with a problem of blowing it s fuse or the house fuse whenever it is plugged in don t overlook the con nector it is Amphenol or Cinch Jones verify that it has been
111. e appropriate line cord PARTS REQUIRED 2 Transistors 2N4280 258206 or 258212 7 CH a 2 4 4 Heat Sink Heat Sink Cover Heat Sink Clamps Screws M3 x 25 Flat Washers 4 Spring Washers M3 1 DC Cable With 12 pin square plug 2 Fuses 20 Amp 4 Tapping Screws M3 x 6 1 a a Insulator 1429A 1 MP Condenser 0 47 uF 60V INSTALLATION 1 Remove the nylon clamp from the back panel and slip off the vinyl tube from the wires 2 Take the protection paper off from the 1429A insulator and stick the in sulator to the back panel as shown in Fig 6 19 3 Screw the heat sink spacers onto the back panel as illustrated in Fig 6 19 using the self tapping screws provided 4 Wrap and solder the wires coming from the back panel to each transistor as shown in Fig 6 20 Make sure each wire is soldered well but do not overheat the transistors 5 Use the four screws M3 x 25 and washers to instal the heat sink and its cover onto the spacer folding the wires gently into loops Do not pinch or crush them while assembling the unit 6 Change the AC power cord to DC power cord 6 17 AUT TON f using 258206 5 leave out the 0 47uf capacitor you don t need it Wire as shown in Fig 6 20 or below 1 using 2S8212 s use a 2 2uf instead of the 0 47hf capacitor Wire es shown in Fig 6 20 or below f using 2N4280 s use the 0 47uf capacitor and wire
112. e knob and lever supplied Replace the trimmer board temporarily removed In Step 9 UNDER THE CHASSIS instructions Carefully check to see that the wiring is correctly done white blue white brown Aj ae YS Sf white red White red white brown yellow coax cable 1 5D2V ioe pe than yellow red green coax cable 1 5D2V Fig 6 7 Lever and knob must travel equally Fig 6 8 6 5 INSTALLATION For units bearing serial numbers higher 150001 prior to installation of the RF processor the transceiver should be modified by the fol lowing steps UNDER CHASSIS 1 Remove the jumper wire between Pin 10 of 5 and terminal board X mark in Fig 6 9 2 Locate the unsoldered red and yellow coax cable between MJ 3 and chassis wall Solder inner conductors as illustrated in Fig 6 9 3 Re install the speaker board MJ 5 MI 4 red coax cable MJ 3 6P terminal board yellow coax cable Fig 6 9 6 6 ABOVE THE CHASSIS 1 Remove a nylon clamp holding wires at the top cover of the VFO unit 2 Remove a black tube from the wires Red white white yellow and white grey wires are soldered together Separate all wires The white wire is not used and the end of it should be insulated by tubing 5 Mount the RF processor board as illustrated in Fig 6 6 4 Wire as illustrated in Fig 6 10 Underlined wires a
113. ectifier Whistle into the mike and see if transmitter power output is back to normal If so C17 is leaky causing final bias voltage to be fed into the ALC circuit Replacing C17 should restore normal power output and ALC indication If grounding the anode of D2 will not restore normal operation then a drive problem exists and not ALC troubles NORMAL TRANSMITTER OUTPUT ALC METER WILL NOT RETURN TO ZERO This trouble is usually caused by the value of C18 and R13 changing and increasing the ALC time constant If you experience erratic meter indications but the transmitter out put is normal check the relay RL 1 A tired spring will sometimes give this sort of indication ALC CIRCUIT FT 101 amp FT 101 B Fig 4 3 1 5 VDC with modulation peaks 0 volts with no modulation 18 Ka to ground L12 05 250uH 1000P C32 1000PF MJ6 2 PIN 11 FINAL BIAS C6 55 VDC 047 PB 1184 MOD amp OSC UNIT 1 2 VDC ON MODULATION PEAKS O VOLTS WITH NO MODULATION VR2 ALC ADJUST PIN 14 1184 MOD OSC UNIT 5 ALC METER ALC CIRCUIT 101 Serial 150001 amp Up 52 4 5 amp 9 50 VDC L5 XMITT 2504H pH C17 D2 1 5 VDC WITH MODULATION PEAKS 10022 151555 0 VOLTS WITH NO MODULATION C32 R8 10K C31 1000PF MJ6 21 FINAL BIAS 55 C15 C14 VR2 LOCATED ON PB 1534 ALC METER METER SWITCH 1 Fig 4 4 RL1 4 10 ADVICE ON TROUBLE
114. ed Usually all other problems are easily and quickly located Since they normally are accompanied by flashes crackling or smoke fallable indications of something amiss HI FINAL AMPLIFIER NEUTRALIZATION The final compartment cover must be in place to supply the RF shielding required during the neutralization procedure HIGH VOLTAGES ARE PRESENT ON UNDERSIDE OF CHASSIS AND INSIDE OF FINAL COMPARTMENT USE GREAT CARE WHILE MAKING ADJUSTMENTS WITH WIRING EXPOSED 1 Connect a dummy load to antenna and set meter to 2 Locate TC27 the neutralization variable capacitor shaft on the under side of the chassis near the driver stage band switch wafer in the fi nal amplifier section 3 Check final amplifier idle current in USB or LSB position and adjust as described before 4 Tune up the transceiver at 29 mHz 108 or 10C band with MODE switch at TUNE position and advance the CARRIER control until meter IC reads 200ma 5 Rotate PLATE tuning control and observe dip as indicated on the meter If the dip is not prominent reduce the loading control slightly for better indication As the PLATE control is rotated the meter should rise equally and smoothly on either side of maximum dip indication 6 Determine which side of the dip rises abruptly Set PLATE control slight ly to this side of dip keeping the meter reading below 100ma 7 Using nonmetallic tuning wand rotate neutralization capacitor shaft very slightly in the
115. ennas or loaded antennas can cause the rig to work perfectly on your test bench into a dummy load but when taken home and set up on the defective antenna the original complaint is back ever heard this before HI Some owners are clever enough to put two and two together and not bother you again correctly discerning that the problem is exterior to the FT 101 and no amount of repair on the rig will solve it But at some point you will have to do some troubleshooting right on the spot in the shack and without your reference library Assuming you were clever enough to bring along this manual here s how to proceed First make sure the rig Is grounded at the chassis ground point with 8 heavy braid wire less than 10 feet long Do not ground to water pipes Now install a VSWR bridge In series with the coax tune up the FT 101 on the band of interest then cut back your power with the CARRIER control to the minimum that will let you get a full scale forward reading on the SWR bridge Remember you are on the air and potentially creating in terference so don t clop the CARRIER on and leave it on any longer than is necessary Check frequency first to make sure it is not In use Now read your forward reverse conditions 1 the VSWR is 1 5 or below shut down the rig and disconnect the feedline at the rig and at the an tenna Check it for open short conditions with an OHM meter If it is OK put the VSWR bridge into the line r
116. et the BAND switch to 160 at 1 900 kHz and the PRESELECTOR at 2 of the inner scale Adjust TC28 and TC10 for maximum power output into the dummy load Turn the OPERATION switch to PTT and leave the VFO and PRESELECTOR settings unchanged Apply the RF signal generator output at 1 900 kHz To antenna terminal Adjust TC29 for maximum S meter reading EE A ra 12BY7A TUNING CIRCUIT GRID CIRCUIT PLATE CIRCUIT BAND COIL CAPACITOR TRIMMER CAPACITOR TRIMMER 820P TC28 C130 820P 0129 160 Tioz Tio6 C4 nomo C9 200 80 C5 ae TC2 C106 30PF C6 50PF Cl10 5 Tc8 Tc T103 C107 10 7102 Fig 7 3 TRAP COIL ALIGNMENT 1 T107 is used to eliminate the direct feed through interference at the frequency and is tuned to 5 720 kHz Set the transceiver at 7 300 kHz LSB in receive mode and peak the PRESELECTOR for maximum noise out put Set the RF signal generator to 5 720 kHz and increase the signal generator output until an audio beat note Ts heard Adjust T107 for minimum audio output L29 is located on the printed circuit board near the antenna changeover relay RL2 1 is also used to eliminate direct feed through interfer ence Set the transceiver at 7 080 kHz in the receive mode Tune the RF signal generator to 5 94
117. f your ability If you must ship it back pack the unit well using the original double boxes and styrofoam packing if you have it yet and insure it for full value Do not include cords microphones or manuals but if you have some pet modifications installed we wil leave them in place if you tape a note to the side of the rig not the box to that effect 4 2 1 9 814 Quvog 510 8 03 300W XL 9601 84 UA LINQ 41 LINN XIN LINN 39 5 D olany 9090 40 1911 34 6151 84 9811 84 SISSVHO 31311938 9401 84 Quvoa amp L0L 9d 03A 300W Xy 9601 84 LINA orany 65161 84 LINN 9S0 00W v8ll ad LINN dl 81 l 8d LINA XIW 0811 84 LINN 3H 1811 84 LINN 621 8d 31345 ANV 4 5 NOISE BLANKER CIRCUITS GENERAL From the earliest FT 101 to the present noise blanker circuit has been a feature of Yaesu transceivers and receivers but it s location has moved a bout a bit and servicing will be simplified if the repairman has good under standing of the various circuits and configurations found in these units FT 101 Early The noise blanker was part of the PB1080 low frequency IF board on this model and consisted of only one transister 06 a 250372 Some versions used 2SC828P which h
118. gs irreparably Do use a 12 watt to 30 watt chisel tip iron Don t use an iron that plugs directly into the wall with only two wires Do use an isolated through a transformer or 5 wire grounded tip iron Accidently passing 110 VAC through our transistor circuitry by us ing a 10 year old soldering iron with the hot leg on the tip has caused many 100 00 repair bills Don t use acid core solder Yes we still see it happening Do use 60 40 rosin core solder and for heavens sake be neat Don t try to heat the pad and shake or blow the solder out Do use a solder sucker and solder tape to clean up the holes Don t panic if you lift a trace we will tell you later how to rework PCBA s Do a super good job and take pride in your work CIRCUIT TRACE REPAIR Most of the printed plated circuit board assemblies PCBA s appear in FT 101 s in only single sided versions however certain boards such as PB 1292 and PB 1181 use a double sided board for the shielding it provides The terminology we will use is explained by the sketches Copper Plastic Phenolic Glass Single Sided The Base Material Board Double Sided Plastic Phenolic Glass Board The component side is always opposite the solder side even if both sides are plated 7 wire used to connect between two sides of a double sided board 1 12 Circuit Traces on PCBA Lifted Trace Base Material Fig 1 6
119. he ANTITRIP circuit provides a bucking voltage to prevent the speaker output from tripping the transceiver into the transmit function A small portion of the receiver audio is taken from pin of Q8 AN214 through VR5 to the input of the antitrip amplifier Q4 TA7042M and fed to rectifiers 01 and 02 151555 providing a negative DC output voltage which is nected to the gate of Q5 2SK19Y This reduces the gain of the VOX con trol transistor providing the necessary antitrip threshold ANTITRIP con trol VR5 adjusts the value of the antitrip voltage threshold so that the loud speaker output will not produce excessive positive DC output from the VOX rectifier so as to exceed the negative DC output from the anti trip rec tifier and thereby cause the control transistor to actuate the relay When speaking into the microphone normally the positive voltage will exceed the negative antitrip voltage and actuate the relay VR3 provides a coarse ad justment for relay sensitivity Relay hold time will be determined by DELAY control VR2 R22 C25 The tone oscillator Q7 2SC373 operates when the MODE switch is in CW position and the key is closed Pin 10 grounded I is a phase shift oscillator operating at approximately 800 Hz The tone output is activated by the keying circuit and then coupled through SIDETONE LEVEL control VR4 to the receiver audio amplifier for sidetone monitoring in CW operation The output from Q7 is also coupled to the V
120. heterodyne oscillator circuit The signal from the antenna coil is fed to the gate of 01 field effect transistor 3SK40M Through terminal 8 of the module The AGC automatic gain control voltage which is obtained from the low frequency unit is applied to the gate circuit of 01 from pin 9 to control the gain of this stage A manual RF gain contro on the front panel is connected to the source of 01 through pin 10 Signal output from the 01 is then coupled to the receiver 157 mixer Q2 2SK19GR where the incoming signal is mixed with a signal from the het erodyne oscillator Q4 2SC372Y through the buffer stage 05 250375 The product of the 15 mixer is applied through pin 17 to the high frequency IF unit 1 15 Transmitter signal is fed to the base of transmitter 2nd mixer 03 2SC784R from pin 13 signal from the heterodyne oscillator is ap plied to the emitter of the mixer Q3 through the buffer stage 04 2SC372Y This converts the high frequency IF signal to the desired transmitting fre quency This transmitting signal is fed to T102 Through 11 The gate circuit of the receiver mixer Q2 is disconnected in transmit by a diode switch to avoid the lowering the Q of the circuit Crystal sockets and all coils are mounted on the main chassis 1180 Fig 1 11 HIGH FREQUENCY UNIT PB1180 The module contains the transmitter 1st mixer 01 2SC372Y the re ceiver 2nd mixer Q2 3SK40M and the 55
121. ias voltage on the gate of 01 reduces the gain of the IF stage which results in a re duction of drive voltage to the final grids VR2 the source circuit of 01 is used to zero the ALC meter with 01 in a quiescent condition As ALC voltage is applied to the gate of 01 varying it s output at an audio rate the source o Q1 also follows these variations which are monitored by the ALC meter ALC TROUBLESHOOT NG ALC ADJUSTMENT VR2 ALC adjust must be able to adjust ALC to the right hand index mark indicating that the switching and metering circuitry is operating properly On the 101 using a PB1534 VR2 is located on the processor board not on PB1184 where it is found on the EE EX models IDLING CURRENT Idi ing current must be resting at 60ma USB or LSB mode transmitter keyed on TRANSMITTER POWER OUTPUT Transmitter power output must be checked in the SSB mode This mode is used because the ALC circuit is defeated In the TUNE CW AM mode Whist ling into the mike of a properly tuned system should indicate from 130 to 150 watts output on a watt meter a watt meter is not available 52 RF volts should be present at pins 5 and 9 of V2 and V3 indicating adequate drive to the finals The above conditions must be met to develop ALC voltages ALC trou bles fall into two groups 1 normal power output and no ALC meter indi cations or 2 low or no power output while operating in the SSB mode NORMAL TRANSMITTER OUTPUT
122. ica tion is color coded to help guide the operator in selecting the proper frequency scale for each band 6 6A 7 CLARIFIER LEVEL CONTROL The clarifier control provides a means for tuning the receiver frequency 3 KHz to either side of the trans mitting frequency Thus it is possible to set the pitch of the voice you are receiving to the most readable point without affecting your trans mitting frequency Its use is particularly valuable in net operation where several participants may be transmitting slightly off frequency The clarifier control functions with the clarlfier switch 7 set to the push down position and a red warning lamp lights up With the clarifier switch in the out position the red lamp turns off and the receiver is again locked to the transmitting frequency The lever control allows adjustment of the RF speech processor D Normally you will want to keep the clarifier in the OFF position until the initial contact is made The clarifier control may then be used to zero in and correct any drift on the received signal 8 PRESELECT This control tunes the signal circuits for both trans mit and receive The preselect circuit provides continuous permeability tuning throughout the frequency range of the transceiver 9 MIC GAIN CARRIER The MIC GAIN CARRIER controls are mounted on con centric shafts The carrier control lever control varles the amount of the carrier in the CW AM and TUNE modes of operation The MI
123. ight at the antenna and check again At resonance the VSWR wil be very very low but as you vary the fre quency above or below it will shift but not go more than 1 5 at the band limits If it does prune or adjust the antenna until it stays below that point Most problems of this nature turn out to be so simple that you tend to overlook them open outer braid or oxidized copper at the connectors pinched or cut coax shorted loading capacitors in the traps or horribly mismatched antennas Some examples Several RF in the shack or my mike bites me on the lip complaints were found to be caused by trying to use CB 27 mHz antennas on 10 meters 28 mHz without retuning the antenna One impossible SWR situation was cured by replacing the feedline which upon careful examination later proved to have a straight pin installed by a neighbor no doubt buried in the coax but only intermittently touch ing the center conductor To help you with the dB answers dB VOLTAGE or CURRENT RATIO POWER RATIO 5 1 41 2 6 2 4 10 3 16 10 20 10 100 30 31 6 1000 40 100 10 000 50 316 100 000 60 1000 1 000 000 ASSEMBLY SECTION 5 CONTENTS OUTER COVER REMOVAL FRONT PANEL REMOVAL MAIN DIAL ASSEMBLY lt lt SWITCH PANEL ASSEMBLY so e o PILOT LIGHT REPLACEMENT VFOREMWAL E ox 2 8 b Q Te INTERCONNECTIONS BETWEEN FT 101
124. ing technique is recommended to avoid damage to your final amplifier section and to prolong the life of your transmitting tubes All tuning should be performed at low power The following procedure is A Do Do Do recommended for all models and versions Peak the preselector on the unit for maximum noise on receive Place the meter in the IC position and the mode switch in the tune position Rotate the carrier control to the fully counter clockwise minimum position Key the mike and increase the setting of the carrier using the carrier control knob until the current is increased 50 ma above idle The idle current should be 60 ma so your meter should now indicate 110 ma Switch the meter to the PO position Adjust plate tuning loading and preselector for maximum meter reading Release the mike button and rotate the carrier contro to the 3 4 clockwise position IMPORTANT In the following steps tune time should not exceed a 10 second interval We recommend at least 20 seconds between such tune periods With familiarity of the procedure complete tuning can be accomplished within a single 10 second period Key mike and repeak plate tuning and loading for maximum PO in dication 10 SECONDS MAXIMUM This completes the tune up Set the mode switch to the desired mode and adjust the mic gain for proper ALC meter indication not exceed the recommended plate current IC not exceed the recommended continuous plate
125. ingle sideband signal arriving from the crystal filter XF32A is fed to Q2 2SK19GR and 01 IC TA7060 When the processor switch is in fhe OFF position the above signal is only amplified by Q2 to compensate for the loss which is caused by having an additional crystal filter XF30A in the RF circuit With the processor switch ON the signal is amplified and compressed Through the compressor amplifier Q1 TA7060 The compressed signal is delivered through to diodes D1 and D2 151555 where the peaks of the compressed RF signal are clipped The harmonics generated by the clipper diodes are completely removed by the following processor filter XF1 XF30A and the processed signal is then delivered through the diode switch to the mixer unit In addition to normal VFO operation two crystals may be selected for crystal controlled operation by a selector switch located on the front panel of the transceiver The crystal holders accept standard HC 25 U type crystals All crystals frequencies must fall between 8 700 kHz and 9 200 kHz A trimmer capacitor has been connected in parallel with each crystal to permit proper frequency adjustment Adjustment of this trimmer will change the crystal frequency approximately 1 kHz Some exceptions can be made to the 8 700 kHz to 9 200 kHz crystal limits that will allow MARS or CAP out of band operation See modification section V 6JS6C V 6JSec Fig 1 24 1183 METERING
126. install the wrong board into the wrong socket so if you have two or three boards out at once check section 5and make sure they are re installed into the cor rect holes or serious damage could result 3 6 VFO REMOVAL Remove the front panel assembly and tilt the inner panel forward about 45 degrees Remove the three hold down screws unsolder the coax and 6 volt lines and lift straight up tilting the gear assembly down to clear the panel assembly Fig 3 6 3 8 INTERCONNECTIONS FV IO FT 101 5 war 2 coax FL 2000B or FL 2100 h Pug TELEPHONE LINE xx Fig 3 7 ANTENNA Tr Uswrreh e Fig 3 8 MICROPHONE CONNECTION 0 650 FTV 650 FT 101 ACC PLUG POWER PLUG 1 1 2 2 3 4 2 5 5 POWER RF OUT Ac 6 6 7 9 9 NC ANTENNA NC va 5 56 6AW8A 6CB6 6 6 8200 gt i RLI FTV 650 2 3 RAUM uM 42 c4 FILAMENT t CHANGE s POWER J4 92001 5 1 3 28 17 47K IW IOK R23 gt ce RLI lt 5 Q002 ass gt 2 R22 IM rm BIAS RL2 D2 os 22 I60WV gt gt FTV 650 BIAS
127. ith L32 on a printed circuit board lo cated on the main chassis near the relay RLI It Is used to eliminate spurious radiation on the 10 meter band For alignment tune the trans ceiver to maximum output at 28 500 kHz the tune position Measure the level of spurious radiation by using the S meter of another receiver tuned to 28 160 kHz where the spurious signal be heard Adjust for minimum S meter reading on the external receiver without decreasing the power output of the transceiver HETERODYNE CRYSTAL OSCILLATOR ALIGNMENT The heterodyne crystal oscillation injection may be checked in the following manner Connect the VTVM RF probe to the local oscillator test point Injection is normal if the injection voltage measures 0 5 volt RMS on all bands 1 not alignment is required Set the BAND switch at 10D TC24 at 1 3 capacitance position and adjust T111 for 0 3 volt RMS reading VTVM Then adjust TC25 TC22 TC21 TC16 and TC26 for each of the band 5 read 0 5 vol RMS nn Mi 5 9 an T 83 ao LOCAL OSCILLATOR TUNING CIRCUIT 3 z E G 2Sc372Y Nak 1602 11 330zMHz 15 2702 Fig 7 4 BAND TUNING CAPACITOR CRYSTAL FREQUENCY 160 xu cu 25er TC26 7 52MHz 80 C45 300PF 6 9 52MHz 40 x2 IS0PF TCU 13 02MAz 20 X3 soF 18 20 02MHz 15 X 4 9 27 02 m
128. ition Oriver Plate Fig 7 7 7 14 L 22 T 115 L 28 T 114 PB 1076 L 22 ALIGNMENT POINTS BOTTOM VIEWS ALIGMENT POINTS BOTTOM VIEW FT IOI E EE EX BAND PASS FILTER ADJUSTMENT The band pass filter located in PB1180 serves to minimize spurious frequencies that normally occur in a mixer and also to provide improved Impedance matching across the desired 5 52 6 02 mHz band A typical complaint that would cause a repairman to check out this circuit would be a report of unequal power output from the low end of the VFO to the high end of the VFO and most pronounced on the 10 m bands where the entire VFO spread is used To check it set up the FT 101 on band 10B 28 5 29 0 using 8 dum my load such as the YP 150 Use a microphone with the rig in the PTT position to key it on and off as you go through the following tests to avoid damaging the finals Just key it on long enough to read the meter or make your adjustments Tune the rig up at 28 75 mHz for maximum power in the tune position then using the carrier control reduce the plate current Indicated on the S meter IC position to 200 ma Don t overheat the tubes while tun ing up Now go through the following steps 1 Tune up at 28 5 mHz bottom of VFO leaving the carrier level alone The meter should read 200 ma 5 ma 2 Tune up at 28 75 mHz middle of VFO the meter should read 200 ma 10 ma 3 Tune up at
129. ket Remove two screws holding the U shaped bracket to the shield plate located between the two boards 3 Remove PB1315A from the chassis connector receptacle Gently rock the circuit board out of the connector 4 Remove the two screws holding the shield plate and lift out of the cabinet 5 Grasping the U shaped brackets still attached to PB1183B gently rock the circuit board out of the connector 14 6 With PB1183B removed from the chassis remove C10 and C9 01 uF capac itors from board Instal 30 CW filter in position indicated using The nuts and lockwashers provided Solder the four filter terminals to the board 7 Re install PB1183B into socket screw shield plate to chassis and re in stall PB1315A into socket Replace all attaching screws This completes the CW filter installation The filter provides a 600 Hz bandpass when the mode switch is placed in the CW position Transceiver re alignment is not required for this installation Fig 6 16 REMOVE CeXXF32A 558 FILTER XF 30C 5 iP jx rt ES E AAS d 5 Fig 6 17 000 CW FILTER INSTALLATION DIAGRAM 6 15 FT 101 Install AM filter in the CW filter position Wire mode switch 520 as fol lows 1 Remove the jumper between pins 1 and 5 2 Remove the banded end of diode D1 from pin 5 and solder it to pin 4 3 Solder a jumper from pin 3 to pin 2 4 Remove the yellow
130. larifier SW Solder to chassis Terminal where white brown wire is soldered 63 Fig 6 4 11 12 Solder the other end of the black wire soldered to the potentiometer in Step 8 to the ground at coil board PB1083A as illustrated in Fig 6 5 The white orange wire is led above the chassis from the opening near the VFO as illustrated Bind the white orange white yellow wires and yellow coax cable to wire harness with string supplied as illustrated Resolder speaker wires and reinstall the speaker board white orange Solder to ground Coil Board Fig 6 5 ABOVE THE CHASSIS 1 Remove nylon clamp holding the wires at the top cover of the VFO unit Bind these wires together with the wires which are brought above the chassis from the opening near the VFO unit as illustrated in Fig 6 6 The yellow coax cable is not used therefore cut it as short as possible MIX unit MOD amp OSC unit RF unit Fig 6 6 red coax cable 1 5D2V Install the RF processor unit on the VFO unit using the screw removed in Step UNDER THE CHASSIS instructions Solder all wires as illustrated in Fig 6 7 There are two kinds of same colored wire i e white red and white brown These wires are from the VFO select switch as underlined in the illustration Tighten the clarifier level potentiometer so that lever and knob travel equally for both sides as illustrated in Fig 6 8 Set th
131. ls may need observation of the trans mitted signal by the scope 160 METERS You will find the tuning is pretty critical on this band The preselec tor is quite sharp and the kind cf antenna you are using may make your fi nal and load controls equally touchy Don t exceed 140 ma plate current when you are between 1820 kHz and 1900 kHz or your spurious will exceed the 40 dB spec limit Don t exceed 330 ma on 80 40 20 or 15 meters and don t exceed 280 ma when on 10 or you will risk those pesky pink tickets or official observ r cards If you get a report of spur check it out promptly and keep your A 1 operator status shiny bright When inserting CARRIER for CW or AM mode be sure you don t move the CARRIER control arm when you are turning up the MIC GAIN cr vice versa At least a mInimal understanding of the importance of antenna feed and matching is necessary for the technician even if he never sees the rig in actual use to help identify mysterious problems dBm is used when referring power to ImW OdBm 1mW across a known re sistive load such as 50 ohms However most SWR meters indicate a voltage ratio and thus readings are expressed as VSWR for a given set of con ditions Typically an amateur uses a coaxial feediine to his antenna and seldom takes into consideration any of the prcblems the cable cen cause if it be comes open or shorted along it s length Similarly failures in certain trap ant
132. m pin 9 and 12 A modification is possible see modification section using an XF 30B filter which will provide a 6 kHz wide bandpass for AM reception The hitch of course is that only two filter positions are provided on PB11838 so you can have either AM and no CW filter or vice versa The signal from the selected crystal filter is fed to the base of Q2 25C784R and is amplified by Q2 and Q5 CA3053 integrated circuit The gain of these two stages is controlled by the AGC voltage derived from AGC amplifier Q4 2508280 The gain can also be controlled manually by the RF gain control on the front panel 1 17 The output from 05 is fed through T109 to the ring demodulator 08 011 for CW and SSB reception The carrier signal is fed to the detector from pin 5 The carrier signal is balanced by VRI to obtain minimum distortion and also to avoid an S meter reading which could be influenced by the car rier oscillator signal signals are detected by D7 151007 and fed to an audio amplifier stage from pin 4 through the MODE switch The detected audio signals are connected to the audio amplifier unit PB1315 from pin 4 AM and pin 6 SSB and CW via the MODE switch on the front panel D5 151007 and D6 151555 are the AGC rectifiers which provide drive to the AGC amplifier Q4 2508280 The emitter of Q4 controls S meter amp lifier Q5 another 2508280 PB 1315 Fig 1 14 AUDIO UNIT 1315 This module contains the microphone
133. mark on the knob is aligned with the desired band mark silk screened on the panel With the band selector on the desired band the tuning dial should now be examined Fig 2 1 The FT 101 tunes 500 kHz segments of a given band and as it comes from the factory it is set up with crystals providing the following cover age See Fig 2 3 160m 1 5 1 2 0 mHz white 80m 5 5 to 4 0 mHz red 40m 7 0 to 7 5 mHz white 20m 14 0 to 14 5 mHz white 15m 21 0 to 21 5 mHz white Tim 27 0 to 27 5 mHz white early model 10A 28 0 to 28 5 mHz white 108 28 5 to 29 0 mHz red 10C 29 0 to 29 5 mHz white 100 29 5 to 30 0 mHz red Black 0 500kHz eJ 11 108 15 1 3 Red 500 1kHz IN 25kHz SEGMENTS 20 toD ME 0 100 407 JJY WWV kHz Marks 80 160M 16kHz revolution BAND SWITCH Fig 2 3 NORMAL TUNE UP addition to the usual rig tune up we gave you on pages 1 6 and 1 7 some additional data will help you to get maximum pleasure from your FT 101 For example to set up the FT 101E s RF Processor begin with the PRO CESS switch OFF set the METER switch to ALC position Speaking normally into the microphone set the MIC GAIN control to the level where the meter Indication stays in green portion of the meter scale Set the PROCESS switch ON and adjust the LEVEL processor output level control to the po sition where the ALC indication stays in the green portion Optimum set ting of the MIC GAIN and LEVEL contro
134. meters 14 250MHz low output on meter C position trimmers for Norma affected band Load all bands and circuit voltages on each band low output pass filter PB 1180 Check for shorted turns in tank ckt Switch to USB LSB CW AM modes and test each PB 1184 Mic AM 1315 all bands no output Check Tx and Rx tracking BPF amp all bands C OK Lor 9 Trouble in coax Tx check complete ali bands Check 600V no output Power supply Missin Test O K PB 10768 OK Norma Check Check driver amp Fig 4 6 final screen regulator grid voltage PB 1292 Abnormal Repair 4 14 3S73A37 NIS Juv 1 N3AI9 53 VA 76 56 S73 37 1 41 3 3 TWNOIS 38V S3n7VA S HM 54704 NI 3 LINN ANY LNOHLIM S3n1VA JAIWSNVHI l 3AI3234 H WOZ QONVB 8sn 330W AIWSNVHI L 3AI323H M 90 S170 NI 38V SANTVA 900 00 9052 ogi 3 3 3 3 ros 8096 0226 3 3 8004 3 8099 osis V 3 800 OBIE 0245 3 3 800 3 3 lo 024 92101 01 e o szi 0909 09 09 o si cei 92 S o 22900 2812213 al
135. nal sources as compared with the low impedance of the forward biased junction transistor base emitter circuit Because there is no input current FET s have less noise than junction transistors Fig 1 25 shows the schematic symbo and biasing for N channel and P channel field effect tran sistors 1 27 COMMON SOURCE COMMON DRAIN SOURCE FOLLOWER B RI Bt INPUT to 15 OUTPUT IMPEDANCE 50K to 100 VOLTAGE GAIN 10 to 200 POWER GAIN 60 to 10048 INPUT to 15 0 OUTPUT IMPEDANCE 1K to 10KSL VOLTAGE GAIN 1 POWER GAIN 40 to 80dB FET AMPLIFIER CHARACTERISTICS FET OPERATION Fig 1 25 FET BIASING MAXIMUM B CURRENT FLOW CURRENT os FLOW o voc INCREASING CONTROL amp 6 AND 5 CONTROL N CHANNEL VOLTAGE VOLTAGE DECREASES CURRENT FLOW B 8 6 VDC Bt CURRENT lt FLOW o voc L MAXIMUM CONTROL amp CURRENT INCREASING G AND S CONTROL VOLTAGE DECREASES CURRENT FLOW VOLTAGE FLOW P CHANNEL BASIC DIODE CIRCUITS Bt Br Fig 1 26 D Hno ourPuT LOGIC QN STATE STATE EQUIVALENT CAPACITOR 1S CHARGING AS DIODE CONDUCTS 0 voc 20 VDC ape soci 20 VDC 0 8 VDC 20 VDC REGULATED REGULATED 0 8 VDC 20 VDC a OUTPUT to OUTPUT VDC ZENER lt o COMMON EMITTER COMMON COLLECTOR R1 COMMON BASE B R1
136. nd positions to obtain best carrier suppression for both side bands as indicated on the external receiver ALC LEVEL ADJUSTMENT To adjust the meter set the controls as follows lt so 5 USB MIC GAIN FULLY CCW MOX PTT VOX MOX f the meter reads other than 5 on the bottom scale adjust the ALC control VR2 on PB1184A for a meter indication of 5 Return the MOX PTT VOX switch to the PTT position On the FT 101E VR2 is found on the pro cessor board Otherwise adjustments are the same RF PROCESSOR Set the MODE switch to SSB either USB or LSB position and the HEATER switch to OFF position Connect the 1 kHz audio signal generator output to the MIC input terminal Set the MIC control to 12 o clock position and the FUNCTION switch to MOX position Adjust the audio signal level to give 50mv input to the RF processor unit Set the PROCESS switch on the front pane to OFF position Adjust VR2 on the RF processor printed board for 50 mv output level at the processor output Set the PROCESS switch to ON position and VRI to fully counter clock wise position Peak for maximum output at the processor output Set the VRI to the point where the RF processor output level becomes equal to the input level unity gain Finally increase the audio input from the microphone until the RF pro cessor input becomes 100 mv Under this condition the processor output level Is approximately 60 mv when the RF processor is
137. not function from 2 0 to 3 5 mHz balance modulator frequencies or 5 5 to 7 0 mHz too close to the IF frequency With those exceptions the FT 101 series can be made operational anywhere within the 1 8 to 30 mHz HF band at full efficiency but re tuning of the coils for the new setup will be necessary The chart below shows the crystals that the factory supplied and the various optional crystals that are available but were not part of the original manufacture FT 101 Late FT 101E 101 FT 101EX FT 1018 160m Band Crystal x 0 0 x 80m v 0 0 0 0 40m 0 0 0 0 20m 9 0 0 0 0 15m 9 0 0 0 0 Tim P M 0 0 0 0 10m 5 0 0 0 X 10m B 0 0 0 0 10m N 0 0 0 x 10m D 2 0 0 0 x WWV JJY n 0 0 0 X Marker x 0 0 0 0 Fixed Freq Ch1 Ch2 X x x x CW Filter x x x x RF Speech Processor not Fixed Frequency Module available 0 X x DC DC Converter 0 0 0 x Cooling Fan X x x x Microphone 0 0 0 x 0 Installed Receive Only X Optional Not Installed SOLDERING AND DESOLDERING TECHNIQUE ON PCBA S The FT 101 circuit boards are tough but not indestructable The most common damage we find when examining customer repairs is overheating the circuit trace which lifts the trace and makes a fragile highly un reliable connection Avoiding this situation is best so get the right equipment on hand first and read over these Do s and Don ts Don t use a flame or high wattage iron it burns thin
138. oint B in Fig 6 11 Apply 1 kHz signal at 10 mv to the microphone input Adjust MIC GAIN control for 30 mv VTVM reading Set VR1 to the center of its range Connect the RF probe of your VTVM to check point Q Peak and T3 for maximum indication of VTVM Set for 50 mv VTVM reading Set the processor switch to ON position and peak T2 for a maximum output HOW TO OPERATE THE RF PROCESSOR 1 Set the meter switch to ALC and RF processor switch to OFF position Speak into the microphone in a normal tone and adjust the MIC GAIN con trol so that the meter indication does not exceed the green portion on voice peaks Set the RF processor switch to ON position Set the LEVEL control so that the ALC indication does not exceed the green portion on the voice peaks Excessive setting of the MIC GAIN will decrease S N ratio of the trans mitted signal Fig 6 12 RF SPEECH PROCESSOR INSTALLATION INTO LATE FT 101 AND FT 1018 PARTS REQUIRED 1 Lug type terminal strip 6 32 mount hole 2 RF 174 miniature coax cables 21 long 2 Plastic insulated hookup wire 22 solid or stranded 21 long 1 Diode 151555 minimum rated 13 5v at 50ma 1 Insulated tubing 3 long 1 2 ID PVC or shrink tube 1 SPDT switch optional 1 1494 Speech Processor board Strip and pre tin the two hookup wires 1 2 inch on each end Strip and pre tin the two coax cables so you have 1 4 Inch of center conductor bare 3
139. ol to OFF and NOISE BLANKER to OFF Do not change the VFO setting and PRESELECTOR contro setting set up in step 1 Tune the RF signal generator to 30 000 kHz and adjust it for approx imately 1 000 Hz beat note Use just enough signal generator output approximately 1 microvolt for an aligned unit to keep from develop ing AGC voltage no S meter indication Set trimmer TC15 to the mid capacitance position Adjust the slug of T101 for maximum audio output without developing AGC voltage Reduce the signal generator output as required to prevent developing AGC the signal generator and re connect the dummy load Set the BAND switch at 10A the VFO at 28 000 kHz and the MOX PTT VOX switch at MOX Advance the CARRIER control and tune the final amplifier Maintain the plate current at 100 ma with the CARRIER con trol as described before Now set the PRESELECTOR control to the lower end of the 10 and 11 meter segment marked in the panel and re adjust trimmer TC5 for maximum output at the dummy load After you have set it at the peak reduce the transmitter output to zero with the CARRIER control and switch back PTT Without changing the VFO or PRESELECTOR control settings tune the RF signal generator to 28 000 kHz and obtain a 1 000 Hz beat note Control the signal generator output as before to avoid AGC action and adjust trimmer 15 for maximum audio output as described in step 2 Repeat steps 1 2 5 and 4 to peak cut
140. or receiver 1 used h A TRIP Anti trip input from external receiver if used i FAN Power outlet for optional cooling fan j ADJUSTMENT Meter sensitivity adjustment for relative power out put indication k RF OUT Signal frequency output from the driver stage may be obtained at this jack for use of optional equipment such as the FTV 250 FTV 650B transverters or the YC 355D counter etc GND Ground connection For safety and best efficiency provide good earth ground for your FT 101 m LAMP FUSE This lamp fuse protects the RF amplifier transistor from damage which may be caused by extremely strong local signals Not installed in early FT 101 s but can be added see modification section n RCV ANT Another receiver can be connected through this jack ANT Coaxial connection for antenna p ACC Accessory socket Provides easy access to transceiver operating voltages and relay contacts at this outlet NOTE The accessory plug with pins 1 and 2 shorted together must be in place or final heaters will not light q KEY Key jack for code operation EXT Connections for external VFO FV 1018 or YC 601 digital dis play s FUSE Fuse holder requires 5 amp fuse for 117 volt or 3 amp fuse for 220 volt operation DC power cord fuse 20 amp 255 FREQUENCY SELECTION Band selection is accomplished by switching the eleven 11 position band switch item 5 of Fig 2 1 so that the index
141. oupling capacitor to the second IF stage Q2 2SK19GR and out of the board through C9 100P and pin 1 The noise blanker is activated when the ground is removed from pin 6 and applied to pin 8 This grounds gate 2 of the 3SK40M which is acting then as a common drain coupled mixer using a Pierce oscillator upper sec tion controlled by a crystal 2 725 mHz The incoming 3 180 mHz is heterodyned with the 2 725 mHz producing a resultant 455 kHz difference frequency The sum frequency 5 905 mHz is differentiated out through 7125 The IF signal is now exactly replicated at 455 kHz This signal is amplified through Q4 3SK40M noise amp The noise signal is coupled out through C20 and is rectified by 03 into an averaging DC signal which af ter integration through R24 C25 is applied to the base as an AGC or level establishing signal 05 amplifies the DC signal producing about 11 volts at the test point and controls the gain of Q4 the noise amplifier The noise output is also applied diode D4 however only pulses exceeding the diode conduction resistance will pass through it to gate 1 of Q6 the pulse amp Noise pulses that do exceed this level cause 06 to conduct biasing Q7 Into conduction and effectively grounding the signal by placing a back bias on diodes 01 and D2 This causes a hole in the IF signal instead of a large noise pulse Early reports by active amateurs disclosed that while the new noise blanker was highly effi
142. ped a major modification that sig nificantly improved the receiver side of the early FT 101 and after serial numbers 25 000 all 101 5 came from the factory with some different boards and circuits than early models This led to a situation where two different models existed side by side with the same FT 101 designation so In this manual pre S N 25 000 units are identified as early and post S N 25 000 as late We only use the last five digits of the Yaesu ser ial number the other numbers and letters are used for internal factory control The entire modification which made an early into a late was devel oped and sold as an update kit which included a 25 page instruction guide complete with pictures and sketches Total confusion promptly occurred with hams ordering the kit known as the MIR 1 Modification Kit who unhappily did not have the test equipment necessary to do the re alignment or just plain lacked the know how to do such major surgery on a sophisticated electronic assembly After fighting the flood for a few months Yaesu withdrew the kit from the open market and today will only install it at their factory There was no FT 101A produced but when the second set of major mods appeared the new issue was designated FT 101B to emphasize its model change including all of the updated circuitry plus adding a new band 160 meters FT 101B s and E s will work on the 160 meter band but you may have to o
143. pplied as illustrated in Fig 6 32 Install the fan onto the rear panel of the equip ment as illustrated in Fig 6 53 4 pin Plug To Cooling Fan FIG 6 32 Rear Panel 6 28 Packing Fan Motor Assembly Washer A Washer MODIFICATION OF FT 101B EE OR EX TO ADD FSK CAPABILITY The circuit is set up for dry keying and supplies 7 5 volts to a keyboard or tape reader CAUTION DO NOT APPLY VOLTAGE FROM A KEYER OR YOU WILL FRY THE COMPONENTS Shift is variable 140 850 Hz by setting the 500 ohm pot MJ 5 1 8 1 4 BOSC UNIT _ os _ 04 2SC828P BUFF EE KEYBOARD CALIG UNIT 01 03 151555 T 25KHz MULTI 6 2 Q2 MFC6020 20 2 03 250735 FUSE HOLDER POWER TRANSFORMER 5 FIG 6 35 6 30 MODIFICATION OF FT 101 SERIES FOR NON STANDARD FREQUENCIES To put the FT 101 on MARS channels requires some re alignment and usually an hour or two of bench work but the data provided herein should make it practical to do yourself if you clearly understand what the FT 101 will and won t do Since the late FT 101 series there has been no auxiliary position the band switch so with al eleven positions of the band switch used up it is necessary to give up one
144. properly adjusted 7 10 VOLTAGE REGULATOR ADJUSTMENT Connect a VTVM DC probe between pin 13 of MJ6 PB1314A and ground Adjust volt potentiometer VR3 for exactly 6 volt reading on VTVM CLARIFIER ADJUSTMENT The frequencies should coincide at CLARIFIER contro OFF and 0 tions In the receive mode If not adjust potentiometer VR4 located near the clarifier control potentiometer under the main chassis until they do See Fig 7 6 Transmitter and receiver frequencies should coincide at the CLARIFIER confrol OFF position If not adjust the ZERO potentiometer VR4 on PB1314A This is VR3 on PB1547 see pages 5 22 and 5 33 BIAS ADJUSTMENT The final amplifier bias must be checked to insure linearity and normal operating plate dissipation for the final tubes Adjust the BIAS control VR2 on 1514 as follows Set the transceiver to the receive mode and allow the transceiver to reach operating temperature Connect the transceiver to a dummy load Set the MODE switch to USB METER switch to IC and the MOX PTT VOX switch to MOX position for trans mit condition The meter will indicate PA plate current Idle plate cur rent is 60 ma if the bias is correct f not adjust VR2 This is VRI on PB1547 FINAL AMPLIFIER NEUTRALIZATION When replacing the final amplifier tubes it may be necessary to reset the bias to give correct idle current and check neutralization Using the procedure outline below will guarantee ma
145. r problems in one quick move Factory techs rarely have recourse to a signal generator since with a little practice it is possible to do almost a full alignment of the receiver section using the calibrate signal and with a little more practice you can learn to pinpoint a blown FET or other receiver problems in moments We have re done the block diagram to show you where the signals can best be verified but the easiest way to get a defunct FT 101 back into a custom er s erms is to carry a set of substitute boards Just plunk in a new board and mail the dud into a Yaesu Service Center This is also a fairly expen sive way but it is fast and efficient The second technique is to use a set of extender boards and using the fault tree boil it down to a board find out what voltage is missing wrong and replace the defective component Most owners and techs do this The third technique is to use this chapter and by finding where you lose the signal identify the errant board remove it and find the defect by re sistance checks Not many folks do this because besides being slow and tedious the success ratio is low This manual will allow you to use all three methods or even combina tion if you wish to avoid using the fourth method The fourth method is packing the unit carefully and sending it to a Yaesu Service Center This is recommended only if your rig is in serious trouble and you have really used this manual to the best o
146. ransmitted pattern since the received signal passes through a sharp filter in the receiver IF section and also is affected by the receiver AGC section The bandwidth of the receiver IF filter affects the display of the actual transmitted signal The bandwidth would be required to be 10 times the actual modulated signal in order to prevent distortion This means that 8 3 kHz filter can only produce 300 Hz signal without distortion So use caution in signal evaluations since a flat topping SSB signal may be received and displayed as if it were acceptable on the RF envelope pattern With the AGC ON the leading portion of the waveform may be displayed with higher amplitude than normal This problem can be minimized if the RF gain is reduced sufficiently to prevent over loading RECEIVER PATTERNS SHOWING SEVERE FLAT TOPPING Signal at FT 101 Receiver Bandwidth Transmitter 3 kHz 6 kHz 16 kHz After the At the IF OUT SSB Filter jack prior to the filter Fig 3 13 YO 100 rear view 101 view FIG 3 14 3 15 LOCALIZING TROUBLES IN THE UNIT SECTION 4 CONTENTS FAULT IDENTIFICATION AND LOCALIZATION SIGNAL TRACING THROUGH FT 101 NOISE BLANKER CIRCUITS ORC pee Set ALC OPERATION KU P rey A gt ALC TROUBLESHOOTING ew we ADVICE ON TROUBLESHOOTING THE FINAL DRIVER FINAL AMPLIFIER NEUTRALIZATION a TREE noy A amp dun 5 5
147. rchangeable The early production of PB1582 boards revealed that it had an inter mod problem which fortunately was easily cured by modification of the on board AGC circuit The Before and After circuit is shown in the modification section of this manual S N 200000 to 208120 were modified In the USA with units after that arriving with the factory mod already in place 4 4 PB1582 BLANKER The noise blanker PB1582 operates through the detection of steep sided noise pulses then closing off the IF amplifier until the pulse has died down to the ambient inherent or signal level While well known as the Lamb Silencer in 1938 the advent of solid state technology has provided the designer with an improved noise blanking technique Fig 4 2 is a block diagram of the new PB1582 circuit to help illus trate the signal flow The 3180 kHz IF signal is brought into the board via pin 4 and coupled to both the IF amp and the pulse detector circuit simultaneously The signal through the IF is coupled into the impedance matching trans former T120 through a 3 pf capacitor Cl The secondary of T120 drives the base of 01 25 572 The 3180 kHz signal is then fed through T121 where two diodes DI and D2 15188 act as gate diodes Assume that the blanker is off and a ground has been placed on pin 6 through switch 5 5 This in effect grounds the center tap of transformer T122 and allows the 3180 kHz IF to flow through the 27 pf c
148. rder a crystal etc The FT 101B was superceded by the FT 101E which included an RF Speech Processor the FT 101EE which omitted the Speech Processor and an AC Base version FT 101EX which did not have the built in DC supply Speech Pro cessor DC cord microphone or 160m crystal Again no FT 101C or D versions reached production status Early FT 101E s used on each band for clipping for the amateur who swi ds 5 the processor level control com d with the clarifier pot usi paddle knob At the same time the processor itself underwent a and emerged as an extremely low ably superior to So in a few short paragraphs we have broadly outlined the histor the FT 101 series of Yaesu equipment rescues contest winners emerg Features Built in AC amp DC power supplies Built in RF speech Processor for increased talk power E model only 260 Watts PEP SSB 180 Watts CW amp 80 Watts AM Factory sealed solid state VFO for optimum stability and accurate 1 KHz readout Effective Noise Blanker threshold adjustable for elimi nation of noise spikes Built in fully adjustable VOX Automatic break in CW operation with sidetone Selectable 25 KHz and 100 KHz calibrator 5 KHz receiver clarifier w separate ON OFF switch Built in WWV JJY reception Heater switch to shut off final tubes for conservation of current drain distortion producing RF processor oth previous Yaesu processors and competitiv
149. re POWER OUTPUT METER ADJUSTMENT VR6 located on the transceiver rear panel adjacent to the antenna coax fitting provides an adjustment for power output indication on the meter This potentiometer should be adjusted to indicate 1 2 to 2 3 full scale meter deflection when the transmitter is producing full output power in the tune position It should be noted that the meter indicates relative power output and is not the basis for determining actual power output VR6 has been preset at the factory to read 1 2 to 2 3 full scale into 52 ohm dummy load The operator should not indiscriminately adjust VR6 into an unknown load or an antenna with high VSWR 7 12 NB LEVEL ADJ REG CALIB UNIT NB UNIT PB 1314 PB 1222 BIAS ADJ VR ZERO ADJ VR 6V ADJ VR ALC ADJUST ON E ONLY lt 1 AF UNIT lt 9 1315 ll i SIDE TONE ADJ VR MARKER FREQ ADJ VOX ADJ VR 55 UNIT PB 1183 1181 l CARRIER MOD UNIT FIX RF PROCESS UNIT ON B EE EX ONLY PB 1184 PB 1534 BM ADJ Fig ALIGNMENT POINTS TOP VIEW EJ 1 NT POINTS BOTTOM VIEW 7 13 TRIMMER DECK Crystal Adjust 2 se in Rx position Antenna PB 1188A 20M 40M Driver NS These 1187 Tx pos
150. re from VFO select Switch and the others are from the wire harness red white brown llow coax cable white blue J 8 A yellow coax c Na white yellow white orange yellow B green red coax cable 8 2 ey lta 1 D LM green coax cable black white zea white brown white grey white red Fig 6 10 ALIGNMENT Resistance Check Prior to applying power to the transceiver check the wiring Set the controls and switches as follows and measure the resistance between various check points and ground MOX VOX PTT SW VFO SELECT SW CLARIFIER CONTROL MODE SW sora sis 4 LEVEL CONTROL PROG SW s V a opie dre 5 METER SW NL 21 n S CLAS SWi i eR es Table 1 shows resistance gt USB LSB FULLY CW POSITION ars ane OFF Sere oo AC oa ab FE value when measured at various test points shown in Fig 6 11 Minus lead of the circuit tester connected to ground When meter indications exceed the values shown by more than 10 re check your wiring Test Point Test Point 1K 250 90 0 5K 0 oul YR 8 amp ime mo XF 30 R TABLE 1 OO L F 8 H Fig 6 11 At test point the plus lead of VTVM Is connected to ground Value of 55 ohms is measured with PROCESS switch ON At test point 90 ohm value is measured
151. s next SIC is the third wafer from the front FIG 6 57 In these older versions where have referenced PB1188A as the osci llator antenna board it will be 1074 PB1187A mixer board is 1075 Otherwise the instructions are the same unless you use the AUX position on an old version Then you will have to wire up to those open wafer term inals as shown in the drawing 5 35 FOR OLDER FT 101 s ONLY PB 1074 PB 1075 SIE 5th WAFER sic THIRD WAFER FROM FRONT 6 36 ALIGNMENT SECTION 7 CONTENTS PAGE WARNING AND CAUTION NOTICE s 2 74 EQUIPMENT REQUIRED V RN o tus gS oS ALIGNMENT PROCEDURE Tx AND s 7 2 TRAP GOML ALIGNMENT 55252824 2 25 14 HETERODYNE CRYSTAL OSCILLATOR ALIGNMENT 7 8 MST METER ABJUSTMENT 5 wo yl p 7 9 NOISE BLANKER ADJUSTMENT 4 7 9 SIDETONE LEVEL ADJUSTMENT s gt lt 7 9 VOXORNUSIMEND 35 55 2 X dew CARRIER BALANCE NULLING s s s lt 7 10 LEVEL ADJUSTMENT 5 Roo Ans v lt x 746 RE PROCESSOR e lesu ore ale VISIO BUAS ADJUSTMENT priat s e FINAL AMPLIFIER NEUTRALIZATION a 7 11 POWER OUTPUT PO ADJUSTMENT 7 2 BAND PASS FILTER ADJUSTMENT 4 4 7 17 GENERAL DANGEROUS VOLTAGES ARE PRESENT USE EXTREME CAUTION WHEN WORKING ON THE T
152. sition allows the operator to actuate the transmitter by simply speaking into the microphone Receiver recovers auto matically when the operator stops speaking For semi break in CW the VOX system will actuate the transmitter each time the key is depressed and receiver recovers each time the key is released D PROCESS An RF speech processor is activated to increase the modula tion power With this switch in the ON position lever control 6A pro vides level setting for best efficiency on each band First used on 101 but late FT 101 s EE and can be retro fitted to use a processor E NB NOISE BLANKER In upper position the noise blanker is placed in the circuit and eliminates noise pulses typically caused by auto ignition F RF RF ATTENUATOR This switch provides insertion of 20 dB attenuator in the Incoming signal path to minimize cross modulation which may be caused by extremely strong local signals 25 kHz 100 kHz CALIBRATOR The 100 kHz crystal oscillator is used o calibrate the receiver In the 25 kHz position the 25 kHz multivibrator generates a marker signal at each 25 kHz point on the dial Clarifier con trol must be in the OFF position when setting calibration H PHONES Headphones may be inserted in this jack for private listening The internal speaker is disconnected when the headphone plug is inserted Any high quality low impedance head phone may be used 1 MIC
153. skirt selectivity for enjoyable CW operation The XF 30C is easily Installed in minutes MMB 1 MOBILE MOUNTING BRACKET The MMB 1 is a floor type mount designed for an over the hump instal lation 1 mounts directly to floor and enables the transceiver o be posi tioned at an optimum angle for easy viewing and operation RFP 102 RF SPEECH PROCESSOR FOR FT 101EE EX Completely assembled with full installation instructions FA 9 COOLING FAN The FA 9 is a low noise muffin type fan which easily mounts on the rear panel of the FT 101 series Operating voltage is supplied through a plug in connector and the fan functions in both mobile and base installations SP 101B SPEAKER CONSOLE Same as the SP TOIPB but without hybrid phone patch YD 844 DYNAMIC BASE MICROPHONE Available in high or low impedances 1 39 OPERATING INFORMATION SECTION 2 CONTENTS PAGE CONTROLS AND SWETGHES se lose 2 Q om ow 25 REAR APRON CONNECTIONS o ul soo v s 2 4 FREQUENCY SELECTION Gy 552 Doh gt 286 NORNAR TUNE UR e re 224 ANTERNAS 45 502 dom d 8 5 101 series of transceivers are designed to operate into 50 to 75 ohm resistive load and will perform well with any of the com mon antennas designed for use on the amateur HF bands NEVER TRANSMIT WITHOUT HAVING EITHER A DUMMY LOAD OR THE PROPER ANTENNA CONNECTED TO THE TRANSCEIVER f antenn
154. t that establishes either the positive or negative peak of a waveform at a particular DC reference voltage in other words it provides a definlte baseline voltage for the waveform Fig 1 26shows a clamper that provides a baseline of about 20 volts for a neg ative putse REGULATORS A diode regulator uses either the constant reverse bias breakdown vol tage characteristic of a breakdown diode Zener or the constant forward bias voltage drop characteristic of a silicon diode Power supply reference voltages are generally provided by breakdown diodes which maintain a cons tant voltage when supplied with a reverse bias voltage greater than their specified breakdown voltage Regulated voltages can also be provided by a forward biased silicon diode which maintains a constant 0 6 to 0 8 volt drop Fig 1 26shows connections for both types of diodes AND PNP TRANSISTORS Transistors are used throughout the FT 101 in circuit configurations such as amplifiers trigger circuits and buffers In the discussion ba sic transistor operation and a few basic transistor circuits are briefly outlined These paragraphs discuss the easily observed changes in currents and voltages in transistor circuits which help technicians locate circuit faults but do not attempt to describe how transistors work internally a transistor a smal base to emitter current controls a large col lector to emitter current A comparison of NPN transistor and PNP transis
155. tem we will be using and where the alignment points are located Toz 3SK40M 4D a i BAND COL CAPACITOR TRIMMER T 160 128 820 Tc29 80 1014 104 C41 240 Tcu 40 C42 20 E 15 T1014 C44 10 Fig 7 1 RF INPUT CIRCUIT NOTE See Fig 1 4 in Section 1 for the test setup use 1 Connect a 50 ohm non reactive dummy load to the antenna jack Tune up the transceiver at 30 000 kHz BAND 10D VFO at 30 000 kHz as follows a Set the BAND switch to 10D the VFO to 30 000 kHz PRESELECTOR con trol to the upper end of 10 and 11 meter segment and the OPERATION switch at MOX Don t leave It in the MOX position for more than 10 seconds at a time until it is in resonance 7 2 b Advance the CARRIER control and tune the final amplifier Don t exceed a resonant plate current IC of 100 ma Use the CARRIER control to adjust it up or down as required d Locate and set trimmer TC5 Fig 7 2 bottom to the mi d capac itance position Fig 7 2 Soften the glue holding the spring shafts and adjust the slugs of T102 and T103 part of the PRE SELECTOR gang on top of the chassis for maximum output into the dummy load e After you have peaked T102 and T103 reduce the transmitter out put to zero with the CARRIER control and switch off the MOX Set the OPERATION switch to PTT RF and AF GAIN control to maximum CLARIFIER contr
156. the coll adjustments for the 0 meter band 6 So now you have the 10 meter and that includes 11 meter band aligned Set the BAND switch to 15 the VFO to 21 000 kHz and the PRESELECTOR to the lower edge of the 15 meter segment Tune up the transceiver to 21 000 kHz as described above Adjust trimmers TC4 and TC9 for maximum transmitter output into the dummy load 7 After you have peaked TC4 and TC9 set the OPERATION switch to PTT and without changing the VFO or PRESELECTOR settings tune the RF signal generator to 21 000 kHz and obtain the 1 000 Hz beat note Adjust trim mer TC14 for maximum audio output as described in step 2 8 Repeat the procedures given in steps 6 and 7 on the 20 meter band Trimmers TC3 and TC8 are used for maximum transmitter output and TC13 for maximum audio output in receive TC26 TC23 TC22 C25 N TOM 20 19 NONG SILVER PLATE MAX MIN CAP CAP 9 7 0 TC9 TC8 Tc6 9 Set the BAND switch at 80 VFO at 4 000 kHz and the PRESELECTOR at 7 of the inner scale Pre set 1 and TC6 at their mid capacitance point Then tune the transceiver to 4 000 kHz and adjust T105 and T106 for max imum transmitter power output into the dummy load 10 Set the OPERATION switch to PTT and without changing the VFO or PRE SELECTOR settings tune the RF signal generator to 4 000 kHz and ob tain a 1 000 Hz beat note Pre set TC11 to the mi
157. the crystal frequency for a fixed frequency within a band use the formula Fy F1 Fe Fo where w NW Band crystal in kHz Crystal frequency Desired operating frequency 3181 5 for LSB 3178 5 for USB One of the three frequencies below 3179 3 for AM or CW 1 8 To simplify matters the values of F are given below for the bands that are normally installed when the FT 101 leaves the factory but should you want to set up your FT 101 for out of band Mars Cap etc use the formula BAND LSB USB AM CW 160m 10701 5 10698 5 10699 3 80 12701 5 12698 5 12699 3 40 16201 5 16198 5 16199 5 20 23201 5 23198 5 25199 5 15 30201 5 30198 5 50199 5 11 36201 5 36198 5 56199 3 10 37201 5 37198 5 37199 3 108 37701 5 37698 5 37699 5 1 38201 5 38198 5 38199 3 10D 38701 5 58698 5 38699 35 Since the FT 101 tunes 500kc segments the band crystals must be chosen so that the desired frequency is contained within a segment be ginning with either zero 0 or 5 For example a band crystal for an operating frequency of 8228 3 mHz would require coverage from 8 0 mHz to 8 5 mHz Add 6 02 to the lower frequency 8 0 and the resultant will be the band crystal frequency In this case 14 02 mHz 8 0 6 02 Second example to operate on 22 733 mHz add 6 02 to 22 0 28 02 Clue Your band crystals wil always end in either 52 or 02 Two exceptions exist the FT 101 series will
158. to the Tx side and troubleshoot it the same way function board circuit component Doing the Rx first eliminates fully 80 of the problem so you can concentrate on the 20 unique to the Tx side Once you have localized the problem to a board using the Fault Tree find the appropriate drawing of it in Section 6 Using an extender board available from Yaesu check for correct DC voltages at the edge connector If they are correct but the board still is Tnoperative use an RF probe on your VTVM and check the gains as shown in each drawing Somewhere along the line you will discover an abnormal condition and be able to trace it to a component Locate the part using the part location drawing and remove replace it using care not to create lifted pads or sol der bridges Re install and test for operation If you need to realign the board or stage we have included the frequency data you need right on the board drawing SIGNAL TRACING THROUGH FT 101 Probably the most useful signal in the FT 101 series that most service men either overlook or fail to use to the maximum advantage is the internal calibrator A quick look at the block diagram of the FT 101 will disclose that it is fed into the transceiver right at the antenna terminal and in a normally operating FT 101 will read about 10 over 5 9 on the meter when you are 14 200 mHz Knowing this little fact can immediately separate antenna prob lems from receive
159. tor operation is shown in Fig 1 27 Indicated current represents conven tional flow of positive charges external to the transistor and is not in tended to indicate flow of carriers inside the transistor structure Notice that the effect of emi tter base collector voltages is totally reversed be tween NPN and PNP transistors circuits which are arranged for an NPN tran sistor usually function normally for a PNP transistor if supply voltages are reversed M Three basic amplifier types are available Fig 1 27 These amplifiers are used alone and in combinations to form complex circuits FIELD EFFECT TRANSISTOR FET Field effect transistors have three terminals source drain and gate which correspond in function to emitter collector and base of junction transistors Source and drain leads are attached to the same block channel of N or P semiconductor material band of oppositely doped material around the channel between the source and drain leads is connected to the gate lead In normal FET operation see Fig 1 25 the gate source voltage reverse biases the PN junction dina an electric field that creates a depletion region in the source drain channel In the depletion region the number of available current carriers is reduced as the reverse biasing voltage Increa s s making source drain current a function of gate source voltage With the input gate source circuit reverse biased the FET presents a high impedance to it s sig
160. ver plate circuit acrcss TC10 located on the board furthest from the front panel PB1092 Now you can hook up the dummy load and get ready to align the transmitter section ALIGNMENT AFTER MODIFICATION 1 Connect the RF probe of VTVM to test point of T111 and adjust TC25 to give 0 3 VTVM reading 2 Set the preselector to the position given under the preselect column Tune the transceiver to the nearest 100 kHz marker signal of signal generator and adjust TC29 PB1188A and TC28 PB1187A for maximum S meter reading 3 Tune and load the transceiver and adjust TC10 on PB1092 for maximum IC reading For the frequencies given in Table 7 it is unnecessary to adjust TC10 4 Adjust plate tune and load controls for maximum power output The plate and load value listed in the table gives approximate setting of the controls When the added fixed capacity does not allow the trimmer capacitor to tune the circuit cut and try small values of capacity until satisfactory tuning can be accomplished Older versions of the FT 101 S N 025000 and lower had different boards and n some cases TC29 is missing completely 1f you run into this situation don t despair but just solder your 50pf trimmer onto the metal shaft of the band switch as shown in Fig 6 37 50 CERAMIC TRIMMER AUX TERMI T e FIX CAPACITOR To find SIC and 510 look along the band switch which is S1 SIA is the wafer closest to the front panel B i
161. wered oscillator producing quantities of unwanted RF on unplanned frequencies so make every effort to avoid losing bias when servicing Make an initial check of the voltages according to the data provided on page 4 15 f everything is normal but you still have trouble then read on LOW POWER OUTPUT ON 10 METERS is frequently caused by a short between the two white leads running from the tank coil to switch Sim which has the effect of shorting out the 10m and llm sections you have normal output on all bands but 10 and 11m check this out first This short results from operating into a high SWR on either 10m or 11m LOW POWER OUTPUT ON ALL BANDS usually indicates either a driver problem or weak output tubes Not all tubes will work in 101 5 due to the vari ations in internal geometry of the elements that occur between different man ufacturers This in turn results in grid plate capacitances that deviate so widely from the design value that neutralization becomes impossible And un neutralized finals will generate spurious signals overheat and fail rapidly For this reason use TOSHIBA finals Other USA brands just don t work properly and are very subject to premature mechanical failure Driver tubes 12BY7 are less tricky but if you use G E tubes re duce the neutralizing capacitor C 123 to 3pf or increase it to 5pf when using RCA tubes Very few subtle problems arise in the driver final area other than those not
162. when VFO SELECT SW is at Ch 1 or Ch 2 At test point N a 5K ohm value is measured when LEVEL control is at a fully CCW position At test point 0 the plus lead of VTVM is connected to ground Value of 2 5K ohms is measured with PROCESS switch ON At test point P a 3 4K ohm value is measured when METER SW is at ALC position VOLTAGE CHECK Apply power to the transceiver Measure the following voltages at the indicated check points Check Point L 13 Volts Check Point K 6 Volts with VFO SELECT SWITCH on Ch 1 and Ch 2 positions 0 volts on other positions Check Point 0 Volts with LEVEL control at fully clockwise position and 6 75 volts at fully counter clockwise position Values were measured by using a 20K ohms volt Voltmeter For transceivers bearing serial numbers lower than 150000 the clar iffer zero set potentiometer VR4 should be realigned as described in the Instruction Manual on page 16 ALIGNMENT The RF Processor Kit is completely checked and tested at the factory prior to shipment The following test procedure may be of help to you if the controls are moved by mistake Set the controls and switches as follows POWER ON MODE USB or LSB HEATER OFF METER ALC PROCESSOR MIC GAIN O fully CCW position 4 Set function switch to position then adjust VR2 on the processor board until the meter indicates full scale Connect RF probe of VTVM to check p
163. wire at pin 9 of MJ 3 which goes to the heater switch SSB and solder it to pin 4 of S2C 5 Remove the yellow wire from pin 4 of S2C and solder it to pin 5 of S2C 6 Remove the red wire from pin 1 of S2C and solder it to pin 1 of mike connector 43 This completes the AM filter modification The set wil operate normal in the LSB and USB modes and will use the SSB filter in the CW mode The wide band AM filter will be switched into the circuit when the mode switch is placed in the AM position and the SSB filter will be switched out of the circuit The only change from norma operation will be in the TUNE CW modes The mike pre amp and amplifier stages will be turned on if the VOX switch is in the VOX position Audio can not be transmitted in the CW mode even though the VOX relay can be energized via the mike but in the TUNE mode audio can be transmitted if the mike gain is turned up BEFORE Fig 6 18 AFTER AM CW Tung O4 75 O3 USB O2 158 M3 PB1183 lt 12 4 1315 12 Blue 558 5 Yellow 281183 9 Yel low 3 MJ3 Ground red wire that was 6 16 removed from pin T of switch 520 FT 101EX DC DC CONVERTER INSTALLATION For installation of DC DC converter base and collector wires have al ready been wired into the power supply in the 101 and are terminated and insulated in a sleeve on the rear of the transceiver The converter kit will allow DC operation of the transceiver with th
164. ximum output and long tube life CAUTION HIGH VOLTAGES ARE PRESENT ON UNDERSIDE OF CHASSIS AND INSIDE OF FINAL COMPARTMENT USE GREAT CARE WHILE MAKING ADJUSTMENTS WITH WIRING EXPOSED 1 Connect a dummy load to antenna and set meter to IC 2 Locate TC27 the neutralization variable capacitor shaft on the under side of the chassis near the driver stage band switch wafer in the final amplifier section 3 Check final amplifier idle current in USB or LSB position and adjust as described before 4 Tune up the transceiver at 29 mHz 10B or 100 band with MODE switch at TUNE position and advance the CARRIER contro until meter IC reads 200 ma 7 1 5 Rotate PLATE tuning control and observe dip as indicated on the meter If the dip is not prominent reduce the loading control slightly for better indication As the PLATE control is rotated the meter should rise equally and smoothly on either side of maximum dip indication 6 Determine which side of the dip rises abruptly Set PLATE control slightly to this side of dip keeping the meter reading below 100 ma 7 Using nonmetallic tuning wand rotate neutralization capacitor shaft very slightly in the direction which reduces the current shown on the meter Repeat steps 6 and 7 until the meter indicates a smooth and equal rise on either side of the maximum dip point The final compartment cover must be in place to supply the RF shielding required during the neutralization procedu
165. y the exact model number of the radio that the part is for While many parts are standard such as disc capacitors and resistors you should use care when substituting electrolytics tantalum capacitors etc 1 in doubt order and use exact factory replacements using the order form or a copy of it in the rear of this section The parts list identifies first the board that the parts go on or into then the circuit designator and description When ordering use full descriptions as shown in the example Example FT 101E Main chassis meter MK 45 FT 101E Main chassis transformer T 102 grid coil A FT 101E PB1292C FET 2SK19GR 05 FT 101E PB1314A MFC6030 ICA etc Shipment is usually made UPS 0 0 0 Allow at least a week for our sterling parts department to perform their magic You will not be noti fied that your order has been received but if parts are back ordered or the order is not clear they will contact you for advice on how you want it handled FT 101 PARTS PRINTED CiRCUIT BOARD PB 1077B Q FET TRANSISTOR amp ic Q FET amp TRANSISTOR 10F 3SK39Q a 25 372 25 372 25 828 2SC784R 2SC828Q RL RELAY 3053 SM 12 D DIODE D DIODE 151007 2 4 5 6 7 8 10 11 12 13 14 15 16 151007 L INDUCTOR 3 9 151941 2504H L INDUCTOR C CAPACITOR 1 3 4 S 6 2504H DIPPED MICA T INDUCTOR

MAINTENANCE SERVICE MANUAL FT-IOI SERIES

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