YAESU - FT-290R User manual
Contents
1. 40 T C2006 T Cooos VR2004 E RE T C2005 E R5 gne T C2o03 83 a VR E 1 1 a 2003 i d b T Coo die RC T V R2002 L2002 ae 2 Tooo 5 4 B ow X 3 D2017 VR2006 Tooo UR VR1001 T2004 5 i UAE 3 T2003 gt sra io aa 1002 T2002 a it e MM Qzo18 1 ER T2001 T3001 VR2007 Dao Sec PLL section 1002 T1010 D2017 T201 TRANSMITTER SECTION ALIGNMENT POINTS 41 TRANSMITTER The transmitter alignment should be performed with a dummy load connect ed to the antenna jack a b c d e f a b a b a b RF Power Stage Alignment Tune the transceiver to 146 000 MHz model B 145 000 MHz and set the MODE switch to FM Connect a dummy load wattmeter to the ANT jack Rotate and VR2004 fully counterclockwise and close the PTT switch Connect the probe of a VTVM to the cathode of D3003 and check to see that the VTVM shows approximately 500 mV rms Connect the probe of the VTVM to the cathode of and frequency counter to the same point Adjust the core of 102 for2. E chy s anges EI d EE bra o EE E E i 1 gd UN eet CI RS XIN Xi any 39 2 Em NET Tivo SN as u 092 Te it 4 4290 cH BI 02010 0010 20010 IHAGSP m E 25 24 When pulse type noise is received and 1 006 rectify the noise and it is then fed through 18188FM to a DC amplifier Qioos 13 which drives gate 2 of The FM mode signal is fed to the mixer section of Qiois MC3357P where the signal is mixed with a 11 265 MHz local signal oscillated by its local oscillator section and fed through a ceramic filter 001 which has a 7 5 kHz bandwidth It is then amplified by IF amplifier Q1o20 2SC2603E and fed back to the IF amplifier limiter section of where the IF signal is amplified and any amplitude modulation in the signal is rejected Next the signal is delivered to the discriminator section which produces an audio output in response to a corresponding shift in the 455 kHz IF signal When no carrier is present in the 455 kHz IF the high frequency noise at the discriminator output which passes through a bandpass filter is amplified by the noise amplifier in and de
3. R1005 1015 J00215151 Film 1 8W VJ 1500 R1103 J00215562 Carbon Film 1041 29 R1013 J00215682 R1116 2028 100215221 2209 44 R1059 2005 100215822 3002 3007 gt 1001 2037 110246103 Composition R2075 J10246221 Composition 1 4W GK _ 2209 2045 3014 2072 302245331 Film SJ X 3309 1002 1011 J00215103 Film R2070 J02245391 oo EM 3902 1025 1029 R2013 2014 100215471 1 8W VJ 4702 4 i 1050 1068 2027 2061 We 1071 1089 3036 3039 1100 1104 1032 100215561 o 5600 1105 1109 1054 1055 _ _ 2034 2042 R1065 110246561 Composition GK 5600 2044 2060 R2068 100215681 Film O NJ 6800 2073 2074 R3013 100215821 22 8200 3016 R1033 1034 300215102 R2010 100215123 1036 1044 R1060 1080 100215153 1049 1077 1082 1101 1107 82076 00 110246153 Composition 1118 2007 1010 1063 Film 2019 1069 1098 2065 3018 2049 2064 3032 3027 3051 2 3035 tmc 2035 3004 21040 Composition 1 4W GK 1kQ 3005 3015 R3045 500215122 Film 1 8 VJ 1 29 3033 3037 R1076 1081 100215152 1 5kQ R2036 2077 101215223 1087 3017 R1114 1115 J10246223 Composition 3030 2031 2038 R3041 Composition 1 4W 2 2 9 R3026 J10246333 R1019 1031 Film 1 8W VI 22k R1125 2022 2043 10021533
4. M Q 9 D3002 T3001 Qs002 PLL SECTION ALIGNMENT POINTS 37 3002 sm VR3001 RECEIVER ALIGNMENT a b c a b c a b c First IF Alignment Set the MODE switch to FM Connect a sweep generator output to gate 1 of Qiooz and set the frequency of the sweep generator to 10 81 MHz Connect an oscilloscope through a detector to 16 of Qiois Adjust the cores of 1006 and Tioia until the scope pattern illustrated in Figure 1 is obtained Cf 10 81MHz Figure 1 FM Discriminator Alignment Set the MODE switch to FM and rotate the SOL control fully counter clockwise Connect an audio voltmeter to the speaker terminal Set the VOL control to the center position and adjust the core of for a maximum reading on the meter SSB CW IF Alignment Set the MODE switch to CW and the frequency to 146 MHz model B 145 MHz Connect RF signal generator to the ANT jack and set the output level and frequency to 15 dBu at 146 MHz model B 145 MHz Adjust the cores of Tioos Tioio and Tion for maximum reading on the S meter 38 4 a b a b d a b c d RF Coil Alignment Set the output level and frequency of the generator to 10 dBy at 146 MHz model B 145 MHz Set the receiver frequency to 146 MHz m
5. 3pF 2074 3006 DD104CH030C50V02 C2030 K06172030 UJ 3pF C3017 K00172030 ECC D1H030CU SL 3pF C3056 K06172040 DD104SL030C50V02 ECC D1H040CU 52 UJ 4pF DD104SL390J50V02 C1072 1095 2112 t K001 75470 DD104SL470350V02 C2027 K05185470 C3024 3025 K00175560 RD871 1N220470J63V DD104SL560750V02 C1053 1083 1 K00175101 DD105SL101J50V02 53 K02175101 DD107CH101J50V02 100pF C1127 K00179056 Ceramic Disc 5 SL 100pF C2031 2032 3035 3038 3039 K06175101 DD105 257SL101J50V02 DD106UJ101J50V02 UJ 100pF C1096 K00175121 51 120pF K06175181 DD105SL121J50V02 ECC D1H181702 UJ 180pF C1075 K02179025 DD111CH221750V02 CH 7220 1041 K00175331 n DD107SL331750V02 SL 330pF C1001 1002 1004 1006 1008 1031 1048 1066 1130 2002 2003 2014 2018 2036 2039 2040 2046 2058 2059 2062 2063 2068 2069 2079 2081 2084 2085 2088 2090 2092 2094 2097 2100 2102 2105 2107 2108 2111 3009 3011 3013 3015 3016 3018 3020 3023 3028 3041 3044 3049 3050 3051
6. 145 000MHz 10kHz SkHz 100Hz IkHz 600kHz 1750Hz FTS 32AE 144 147 000MHz 10kHz 5kHz 100 2 IkHz 600kHz 1750Hz FTS 32AE 147 999 FT 290R 2 METER PORTABLE TRANSCEIVER INTRODUCTION The FT 290R is a highly sophisticated compact multi mode transceiver for the two meter amateur band Featuring PLL synthesis in 100 Hz 1 kHz 5 kHz 10 kHz steps the FT 290R utilizes a Liquid Crystal Display for digital readout of the operating frequency Ten memories scanning of the band or memory channels two VFOs and receiver offset tuning make the FT 290R a significant breakthrough in technology Powered by eight C size dry cells or Ni Cd batteries not supplied the FT 290R is completely self contained and portable A telescoping whip antenna is built into the FT 290R for convenient portable operation And a high performance noise blanker is also included for minimizing inter ference caused by impulse noise Power output is 2 5 watts switchable to 0 5 watt for battery conservation For memory backup purposes a lithium cell is included providing an estimated lifetime of five years because of the extremely low current consumption of the memory circuitry The light weight portability and efficiency of the FT 290R make it suitable for field satellite operation emergency FM work or vacation enjoyment We recommend that you read this manual in its entirety so as to understand more
7. BOTTOM VIEW 33 Qon 2012 Q 1027 Q105 1021 1006 Q 2022 1008 1007 1 Nic 1002 a FEL Q2021 it 01025 2020 i ES Q 1009 Bea gt Q205 5 2002 2 Qiois Qoo09 d 4 X Q2003 5 ERE i 1016 2007 JV Quois 02018 FHI gt UN l 6 3 E Qua Qaoio 3005 3009 Q 3007 Saah by Day ham 34 x x gt 2 F 4001 Qao 4001 J4001 gt amp 9 gt av 5 9 9 c x 5 Quoos Qaoo3 Quoos X 1001 9 100 Q4002 BAT 400 9 dai 5002 5002 2 Q5003 i Wut A Jon 5003 5500 BACK UP 35 PLL CIRCUIT ALIGNMENT The PLL circuit alignment procedure is very critical because of the ambient temperature change This alignment must be performed under temperature conditions between the range of 15 to 30 C If your transceiver is exposed to temperatures beyond
8. SORC2 R47 hh C1092 1094 K40149011 Electrolytic 25WV 4 7uF 1131 3048 25RC2 4R7 C1062 1064 K40129012 16WV 10uF 1087 1104 16RC2 10 1123 2004 2007 2011 2019 2021 2023 2086 2089 2093 2096 2109 2110 3010 3045 3054 3055 1128 1132 40109002 10WV 4TuF 1137 10RE47 C1134 K40129007 16WV 100uF 16RE100 C1136 K40129021 10004 162 1025 C3033 K70167474 Tantalum 35WN 0 47uF 515 1 47 2020 70127106 16WV 105 __ CS15E10100M C3034 K54200001 Polyester Film 100WV B32561 A 1105J TRIMMER CAPACITOR TC3001 K91000056 TZ03Z070A 1001 1003 2001 2006 91000075 TZ03R200E 20pF INDUCTOR L3003 L1190004 FL 4H R68M 0 68 12011 3004 L1190005 FL 4H 1R0M 11003 L1190111 FL 4H 5R6K 5 6uH L3001 3006 11190014 FL 4H 100K 10uH L1001 L1190016 FL SH 101K 100uH L1004 1005 L1190120 FL 5HA471K 470uH L2001 L1190102 S 104K 100mH L2004 L1020682 12003 2005 L1020683 12007 2009 L1020681 L3005 11020680 L2002 L0020775 L2006 L0020725 L2008 L0020766 L2010 L0020744 L2012 _ 10020341 L2013 2014 L0020743 L3002 10020359 13007 3008 10
9. 3053 3057 K12171102 DD105E102P50V02 0 0014F C1011 2033 2035 K11179001 n r m 0 001uF C1005 1007 1018 1061 1073 1074 1080 1082 1084 1088 1090 1093 2054 2060 K13170103 ECK D1H102MD DB201YF103Z5L5 0 01uF Soak by Dan dinect wow hamdirectory info C2061 3029 K13170103 Ceramic Disc DB201 YF103Z5L5 7 C3026 3030 3037 3042 14179002 RD204YM103Z50V C1024 1098 1099 1133 2008 2041 7 K19149001 Semiconductor Ceramic UATOAX102K LOSAE C1124 K19149005 UATOAX222K LOSAE 0 00224F 2009 19149007 rr m UAT05X332K LOSAE 0 0033uF C1044 1049 1054 1060 1063 1065 1068 1069 1071 1108 1125 2010 2012 2017 2043 K19149013 UATOSX103K LOSAE 0 01uF C1100 1102 19149017 UAT06X223K L45 AE 0 022uF C1021 1025 1027 1028 1030 1034 1035 1037 1039 1043 1045 1047 1050 1052 1055 1057 1085 1105 1106 1109 1110 1138 2024 2025 2044 2045 3003 K19149021 UAT08X473K L45AE 0 047 uF C1091 1135 K19149025 UAT13X104K L46AE C1097 K40179002 Electrolytic SORC2 R1 C1042 1067 1086 1097 1111 1112 1126 1129 2001 2005 2006 2013 2026 3027 ham K40179001
10. INSTRUCTION MANUAL FI 290R YAESU ELECTRONICS CORP Scanned by IW1AXR Downloaded by P O BOX 49 Amateur Radio Directory PARAMOUNT CA 90723 U S A YAESU MUSEN LTD C P O BOX 1500 YAESU TOKYO JAPAN TABLE OF CONTENTS Page INTRODUCTION 1 SPECIFICATIONS 2 SEMICONDUCTORS 3 ACCESSORIES 3 FRONT PANEL CONTROLS AND SWITCHES 4 REAR APRON SWITCHES AND 8 SIDE PANEL JACKS 10 INTERNAL SWITCHES 11 OPERATION 14 CIRCUIT DESCRIPTION 25 MAINTENANCE AND ALIGNMENT 32 PARTS 8 46 FT 290R MODEL CHART FREQUENCY FREQUENCY REPEATER TONE BURST TONE FREQUENCY PRESET STEPS STEPS SHIFT FREQUENCY ENCODER SQUELCH COVERAGE FREQUENCY FM SSB CW FM OPTIONAL OPTIONAL OPTIONAL 4 147 000MHz 10kHz 5kHz 100 2 1kHz 600kHz 1800Hz FTS 32AE 144 25kHz 1750Hz FTS 32AE 14 999MHz 145 000MHz 20092 1 600kHz 144 25kHz kH 1750Hz FTS 32AE 14r9gMHr 145 000MHz 1009 600kHz 144
11. 18188FM producing DC voltage The DC voltage is amplified by DC amplifier Q1014 28C3603E and fed to gate 2 of Qioio to control its gain thus preventing overdrive ALC level is adjusted by for proper gain at Power Control Circuit When the HI LOW switch is set to the low position and the base of Qoo 2SC2603E to a high level the voltage at the corrector becomes low thus reducing the voltage at gate 2 of 3SKS9GR and the amplitude of the RF signal 30 PLL Control Circuit PLL Control Unit features a low current drain 4 bit microprocessor chip HD44820A 18 which processes data for controlling the operat ing frequency UP DOWN scanning priority channel memory selection etc The CPU processes input data by means of the main dial or other control switches in accordance with the program stored in a ROM for control of the PLL frequency indication of the operating frequency or memory channels on digital display 31 MAINTENANCE AND ALIGNMENT This equipment has been carefully aligned and tested at the factory prior to shipment If the instrument is not abused it should not require other than the usual attention given to electronic equipment Service or replacement of a major component may require considerable realignment Under no circumstances though should realignment be attempted unless the operation of the transceiver is fully understood the malfunct
12. set the BUSY MAN CLEAR switch to CLEAR The scan will halt and the decimal point will blink as in the previous section Press the UP DN or PTT switch to cancel the pause resume feature and hold on the frequency you stopped at Memory scan halting follows the same format as main dial scanning PRIORITY CHANNEL OPERATION Priority channel operation uses a combination of the main dial VFO and the memory It can be used in conjunction to the automatic scan stop feature of the microprocessor if desired The steps for priority channel operation are detailed below 22 tony dinec S o by hamdirectony info Warm 1 Program into memory the desired priority channel Do not recall the channel at this time 2 Dial up a basic operating frequency on the main VFO This will be your main operation channel during priority channel operation 3 Set the BUSY MAN CLEAR switch to BUSY or CLEAR as desired 4 Now push the yellow F button followed immediately by a press of the MR PRI button The letter will appear on the digital display signifying priority channel operation The display will then show the VFO frequency with a flash every five seconds to the memory channel being checked for activity When the memory channel is busy or clear depending on your instructions the scanner will halt on the memory channel The pause restart feature does not function in this mode to restart simply press the F
13. Film 1 8W VJ R5007 100215223 2 5001 140900023 _RB5002 140900022 THERMISTOR _ TH5001 _ _ G9090016 _ 330 28 CAPACITOR C5001 _ K10176391 Ceramic Disc 50WV 390pF DD104B391K50V02 1 1 C5002 5005 K12171102 0 001uF 5010 5012 DDLOSEL02P50V02 5006 5008 1 19149009 Semiconductor Ceramic 0 0047 5009 UATOSX472K LOSAE C5007 19149013 0 01uF C5003 5004 K40129012 Electrolytic 16WV 4 e CONNECTOR EN J5001 P0090213 2 12B XH 12P _ 15002 P0090211 S 10B XH 10 EN J5003 P1090232 3024 18CH _ 18 _ 55001 N6090008 SWITCH _ 555 012 BZ5001 _ M4290901 B BUZZER EFBRE 25D02 Symbol No Part No DISPLAY UNIT Description ____ 2237 20002237 _ Printed Circuit Board C0022370 P C B with Components IC 61090346 _ 00 DS6001 _ 66090025 LCD H1313A _ 701000046 LAMP BQ031 30
14. LOW HI Rotate the VOL switch out of the click stop and adjust the volume level for a comfortable audio output from the speaker The LCD display will indicate the operating frequency Initially first switch on after the memory backup battery has been installed the display will indicate 147 000 MHz as a preset frequency thereafter when the transceiver is switched on the backup feature will keep you locked onto the frequency and mode dial or memory last used when you switched the unit off The STEP switch is used to select the desired synthesizer step 1 kHz or 100 Hz per step SSB CW modes If you rotate the main tuning dial initially the synthesizer will provide 1 kHz steps Press the STEP button once and you will note that the steps are now 100 Hz 0 1 kHz each Another pressing of the STEP button will return the selection to 1 kHz step While most operation on 2 meters is USB there are many times especially during satellite operation when LSB operation is needed Simply rotate the mode switch to LSB to select that mode There is no passband tuning adjustment needed on this transceiver Rotate the main tuning dial until an SSB signal is heard Using the 100 Hz step mode tune in the signal until a natural reproduction of the voice signal is obtained To transmit close the microphone PTT switch and speak at a normal level into the microphone Release the PTT switch for receiver recovery The microphone amplif
15. by using the low power position whenever possible 16 FM OPERATION Preset the controls and switches as described for SSB operation but set the MODE switch to FM SIMP In the FM mode the synthesizer steps provided are 5 kHz and 10 per step the clarifier steps are still 100 Hz step When you are changing modes from SSB to and were last operating on other than a 5 kHz or 10 kHz step the microprocessor will automatically move you to the next higher or lower 5 kHz or 10 kHz step upon the first click of the main tuning dial or first stepping of the scanner Rotate the main tuning dial or operate the scanning controls until the desired frequency is reached To transmit close the PTT switch and speak into the microphone in a normal voice Release the PTT switch for receiver recovery For repeater operation selection of the standard 600 kHz splits is provided on the front panel For 600 KHz shift set the MODE switch to and for 600 KHz shift select This selection can be made either during main dial or memory operation For operation on odd splits use a combination of the memory system and the main tuning dial First store the desired receive frequency in any memory channel Now use the main dial to select the desired transmit frequency Next push the yellow F and S buttons You will now be receiving on the memory channel just programmed When you close the PTT switch you will be transmitting
16. generated by 25 535 and multiplied 7 times by 28C535A This local signal varies from 131 9 131 999 MHz as a result of the control voltage from the CONTROL Unit Thus a PLL IF frequency of 2 00 5 99 MHz is obtained The frequency varies at the PLL local signal providing movement in 10 kHz steps 29 This PLL signal is then amplified by 2SC535A and fed to uPD2819C where the programmable divider section divides the IF signal by 200 599 depending on the data from the 4 bit microprocessor in the CONTROL Unit Next this signal is delivered to the phase comparator section where the phase of divided IF signal is compared with its reference signal of 10 kHz This reference signal is generated and divided by the reference oscillator reference signal divider section in Any difference in phase of the divided PLL IF signal with that of the PLL reference signal is converted into an error signal with a different bandwidth of pulse This signal is then fed to active lowpass filters 7 and resulting in a VCO correction voltage When the PLL is unlocked an unlock signal at pin 7 of drops to a low level cutting off the bias voltage at 09 28C2603E and thus turning off 19 3SK59GR 3SK73Y ALC Circuit A portion of the RF signal is coupled through C594 to a rectifier circuit consisting of and
17. on the main dial frequency If you desire to listen on several memory channels the memory channel selector may be rotated as desired The front panel CALL switch activates a manual length 1800 Hz tone for repeater access When this button is pushed the transmitter is activated and the access tone is superimposed on the transmit signal 47 Rotate the SQL Squelch control fully counterclockwise Now turn the VOL control out of the click stop to turn the transceiver on Advance the volume control for a comfortable listening level When the channel is clear adjust the SOL control so the background noise just disappears This threshold point is the point of maximum sensitivity and the squelch control should not be advanced beyond this point too far or the squelch will not respond to weak signals CW OPERATION 1 The synthesizer steps selected in the CW mode are identical to those used for SSB operation 2 Connect a key to the rear panel KEY jack using a miniature phone plug The key up voltage is 7V while the key down current is 0 3mA so most electronic keyers that close completely to ground will work well with the FT 290R 3 Set the MODE switch to CW 4 Close the PTT switch on the microphone to switch to the transmit mode If desired a footswitch may be used with the FT 290R The STAND BY jack located on the side of the transceiver is wired in parallel with the PTT line on the microphone This may be used in situ
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19. this range for an extended period of time the transceiver should sit in the proper alignment temperature for at least two hours before you start the following alignment procedure 1 b c a b a b c d e f PLL Local IF Alignment Set the MODE switch to the FM position and adjust the frequency to 146 000 0 MHz model B 145 000 0 MHz Set 1 to the center position and connect an oscilloscope to pin 14 of Adjust the cores of T3990 for maximum amplitude on the oscilloscope VCV Line Adjustment Tune the transceiver to 146 000 0 MHz model B 145 000 0 MHz and connect a DC voltmeter to R3014 Adjust for a reading of 3 5 volts on the meter PLL Local Frequency Adjustment Set the MODE switch to FM and tune the transceiver to 146 000 0MHz model B 145 000 0 MHz Preset and VR3oo to the center position Connect a frequency counter to the cathode of 03002 or D3003 Adjust the core of L3oo7 for the frequency of 135 190 0 MHz model B 134 190 0 MHz Now turn the CLAR switch on and rotate the main knob one click counterclockwise 1 step Adjust VR494 and for a frequency of 135 189 9 MHz model B 134 189 9 MHz Repeat the alignment from step c to e a few times to be sure the proper frequency is obtained 36
20. unit in operation 2 SCAN This switch selects scanning stop on a busy or clear channel per your requirements Manual scanning can also be selected if desired 3 BACKUP This switch activates the memory backup feature Once the batteries are correctly installed this switch may be turned on and left on indefinitely See the operation section for details LOCK gt m 11 ANTENNA CONSIDERATIONS The FT 290R is designed for use into a 50 ohm resistive load While departures from this value are of no significant consequence it is possible to damage the transmitter circuitry if no antenna is connected and the transmitter 1s activated For most portable use the built in telescoping whip antenna will provide satisfactory operation For base station use any of the popular beam or phased arrays will provide excellent performance so long as they present the proper impedance to the transmitter and have been optimized for best forward gain When an external antenna is being used the whip antenna should be telescoped fully into the FT 290R Conversely when no external antenna is connected the whip should be fully extended Failure to observe these simple precautions will void all warranties on this unit BATTERY INFORMATION The FT 290R is designed for use with eight size C Ni Cd rechargeable cells or eight dry cells of the same size When using alkaline cells or other dry cell types no dummy batter
21. 00 Symbol No Part No Description R4007 101215102 TS Ako PB 2236C 7 F0002236C Printed Circuit Board R4001 100215222 VJ 2 C0022360 P C B with Components R4002 4003 100215103 10 qo 0 0C mE T _ POTENTIOMETER VR4001 150717104 RV8 HAS 100K 100kQB 05001 __ G1090349 HD44820 A18 05002 5004 G1090126 MCI4069UB _ CAPACITOR 4001 K00175150 Ceramic Disc 50WV SL 15 TRANSISTOR DD104SL150750V02 G3326030E 25 2603 C4002 4003 K00175330 33pF B 7 010481 330750 02 C4007 4009 12171102 0 001 DIODE 4012 4013 DD105E102PS0V02 D5002 5005 G2090027 Si 4016 m EN c D5006 G2090118 Schottky Barrier C4006 4010 K40179005 Electrolytic 0 47uF U SORC2 R47 4004 4005 K40179001 RESISTOR 16RE330 85001 700215271 Carbon Film C4011 4015 K40129012 16WV 10 100215102 oom 16 47 R5019 100215392 C4008 4014 40109002 10WV 4TuF R5008 100215562 Z 10 47 5005 100215103 R5002 J00215273 R5017 J00215473 R5003 5006 J00215104 5018 R5011 5012 100215334 5014 5015 R5013 5016 100215684 uu CONNECTOR J4001 P0090202 B13BT XH 58 R5004 5009 5010 100215105 Carbon
22. 018 1037 1038 1121 2020 2063 100215560 1 8W VJ FET Q1001 G4800590Y 35 59 Q1002 G4800510C 3551 03 01003 1010 G4800730Y 35 73 1111 3002 o 01009 3003 G3801680D 2SK168D Q1015 2017 G3801920G 2SK192GR 2018 3001 03007 G3800301Y 2SK30A Y 02019 G4800590G 3SKS9GR 7 t TRANSISTOR 01004 3004 3305350 25 535 3005 3009 3010 L 01007 1013 63326030 25 2603 1014 1017 1020 1021 1025 1026 2001 2003 2007 2009 7 _ 01008 7 63090005 MPS AI3 s m Q1016 77 G3107331Q 2847330 01018 G3107331P 28A733P Q2011 2012 63309451 2SC945P 3008 m u Q2020 G3320260 2SC 2026 NM 02021 63320530 28 2053 NI 02022 93319470 28CI947 01005 763315830 2SC1583 01006 2005 653327860 25 2786 O mum 30 92090023 Varactor 15 50 2005 520901080 15 68 D1002 1004 2090109 15 69 2018 2022 D3001 62090107 m 1125 71005 1006 G2001880F 15188 1028 1029 1031 1042 2007 2009 2010 2027 3005 EN 7 D2023 G2015550 Si 181555 Le R1012 1021 1023 1026 1030 1043 1048 1052 1057 2054 2067 3003 3008 3012 3019 3040 100215101 1113 3044 110246101 Carbon Composition 1 49 GK 1000 1078 110246472 Composition
23. 020950 TRANSFORMER T1001 1004 2002 2006 3001 3003 10020345 T1005 1012 10020187 1013 10020887 T2001 L0020910A T1014 10020888 RELAY RL2001 i M1190001 FBR211AD009M TERMINAL BOARD Q6000005 1L2P FB2001 2002 L9190001 Ferrite Beads Symbol PB 2239A Part No REG UNIT Description 0002239 Printed Circuit Board C0022390 with Components G1090239 _ TCS082P _ G1090350 ICL7660CPA FET G3801930K 28K193K E TRANSISTOR G3307331P 25 733 G3304960Y 7 28 496 G3309451P 25 945 _____ _ _ 4001 09000106 CR2025 35mAh DIODE D4001 G2090027 Si 15553 T FUSE 4004 4006 Q0000021 1 20 24002 262090104 Zenr _ RD6 8EB 3 D4003 G2090193 ol _ RDS 6EB 3 _ FUSE HOLDER FH4002 4003 P2000020 UF 0033 CRYSTAL __ EN X4001 1750Hz H0101982 HC 18 T 7 168 MHz Model B C D E X4001 1800Hz H0101983 HC 18 T 7 3728 MHz Model A __ RESISTOR R4006 J01215100 Carbon Film 1 8W TJ 109 CONTROL UNIT R4005 J00215471 47
24. 103A Symbol PB 2238 F0002238 KEYBOARD UNIT Description _ Printed Circuit Board C0022380 P C B with Components D7003 7007 G2090027 D7001 G2090136 DIODE Si 18883 LED TLG205 D7002 G2090137 101215821 Carbon Film LED TLR205 Lo RESISTOR 1 8W 8200 57001 7007 TN5090003 7008 SWITCH __ 10901 N4090042 SUT 111 _ CONNECTOR _ 20090210 S9B XH _ Symbol No PB 2241A Part No F000241A SWITCH UNIT B Description Printed Circuit Board C0022410 P C B with Components TRANSISTOR Q8001 _ 63326030E 2SC2603E _ ______ n RESISTOR R8001 1 100215223 CaronFim 1 8W VJ 22 9 R8004 101215333 TJ 33kQ R800 700215473 7 7 7 VJ R8003 101215474 7 7 TE 4 n CAPACITOR C8001 8002 12171102 Ceramic Disc 50WV 0 001 uF DD105E102P50V02 2255 SN SWITCH 58001 N6090007 555013 58002 N6090008 SSS012 EC uu ________ ACCESSORIES Symbo No Part No Description o M3090033 Microphone 47 P1090253 Microphone Plug FM147P R7070600B Shoulde
25. 173070 n SL 87002 100215225 2 2 9 u 10451070050 02 1067 100215335 n __ 3 3M2 C3001 K05173080 R1124 100215331 3309 _ DD104RH080D50V02 R1126 101215102 o T 02173090 EE CH POTENTIOMETER DD104CH090D50V02 VR2002 2006 151745102 H0651A 1KB C3043 K00173090 SL 2007 _ _ DD104SL090D50V02 VR2003 2004 151745103 HO651A 10KB 10kQB C1012 1101 2067 K00173100 4222 VRI002 2001 151745223 HO6S1A 22KB _ 22 9 2075 2101 _ DD104SL100D50V02 VR1001 3002 151745473 HO651A 47KB 47kQB C1079 K02173100 VR3001 J51745154 HO6SIA 1SOKB 150 0 m DD104CH100D50V02 VR1003 51745225 H06514A 2 2MB 2 2M2B 3007 K02175120 oon DD104CH120350V02 C2064 2065 K06175150 T THERMISTOR ECC D1H150JU TH2001 G9090020 21D27 _ C3005 3007 K02175180 TH3001 G9090008 31D26 _ 22221 DD104CH180J50V02 C2056 2057 K00175180 oon DDIO4SL180150V02 CAPACITOR C2095 3022 K00175220 C1015 2037 2038 K00179001 Ceramic Disc 50WV SL 0 5pF _ EN DD104SL220150V02 2072 3046 DD104SLOR5C50V02 C1078 K02179011 C1010 2066 K02179003 CH 2pF DD104CH270150V02 2076 2083 DD104CK020C50V02 C1040 2078 K00175330 K00172020 SL 2 2087 2098 DD104SL330J50V02 DD104SL020C50V02 2099 2106 C3004 K06172020 TN 9 2pF 3031 3032 _ ECC D1H020CU C2104 K00175390 C1013 2070 K02179004
26. 2 1058 1083 R1016 1035 J00215473 2012 3028 1039 1064 3029 1075 1084 R1042 2018 2 7kQ 1085 1090 3009 3011 _ 1110 2025 R3020 Composition 1 47 2 2032 2050 1046 1056 Film 1 8W VI 3 3 2051 3001 1062 1102 3034 3038 _ 2001 2003 R1073 1074 100215823 2039 1006 1008 100215104 R1053 2008 3 9ko 1009 2023 R1051 1061 4 7kQ 2052 2053 1070 1072 2055 2058 1086 1106 2062 3006 2004 2009 R3022 3024 110246104 Composition R1112 100215124 Film 1 8W VI 50 1024 1111 J00215154 Carbon Film VJ 150k2 C1058 3008 K00172050 Ceramic Disc 50WV SL 3021 3014 3040 DD104SL050C50V02 R1119 100215224 _ 220k0 C2077 2082 K06172050 Us R1079 3043 100215274 42 o 270 0 DD104RH050D50V02 R2006 3042 100215334 330k2 C1003 1023 K00173060 on SL R1020 1027 100215474 4Toka 3021 DD104SL060D50V02 1108 1120 C2071 2073 K06173060 oon UI R2040 100215684 oom 6800 _ 3002 _ DD104UJO60D50v02 _ R1004 1123 3025 100215105 1MQ C1009 1014 K06173070 1123 101215105 1M2 1016 2 ECC D1H070DU R1066 1097 700215155 M 1 5MQ K00
27. 9 which oscillate sidetones of about 800 Hz and the sidetone signal is then delivered to the AF amplifier 28 Tone Burst Circuit When the T CALL switch is pressed the base of 2SA733P is grounded and a DC voltage is applied to tone burst oscillator Qao 5082 to generate a 1800 1750 Hz tone signal The tone is super imposed on the transmit signal as long as the switch is held PLL Circuit The PLL circuit is composed of a reference crystal oscillator programmable divider VCO voltage controlled oscillator PLL local mixer PLL local oscillator lowpass filter and phase comparator The PLL produces the local signal for the receiver and transmitter stages using a synthesis scheme which utilizes 100 Hz steps throughout the range The VCO oscillator 2SK192GR generates a signal at 133 190 137 190 MHz The oscillator frequency is controlled by varactor diode 1T25 which varies the capacitance of the oscillator tuned circuit in accordance with the control voltage supplied from an active lowpass filter consisting of Q3997 2SK30AY and 28C945P The output signal from Qoo is amplified by buffer 38K 73Y delivered to TX mixer and RX mixer A portion of the local signal from is fed through the buffer amplifier 25 535 to the PLL local mixer 28C535A where the signal is mixed with PLL local signal
28. CW 2 4 kHz at 6 dB down 4 kHz at 60 dB down EM 14 kHz at 6 dB down 25 kHz at 60 dB down Image reduction Better than 60 dB Audio output impedance 8 ohms Audio output 1 watt 210 THD Specifications subject to change without notice or obligation Downloaded by Amateur Radio Directory ICs HD44820A18 ICL7660CPA MC1496P MC3357P MC14001B MC14069UB TC5082P 0401 575 2 uPC577H uPD2819 C FETs 2SK30A Y 2SK168D 2SK192GR 2SK193F 3SK51 03 3SK59GR 3SK59Y 3SK73Y MICROPHONE YM 47 M3090033 R0071360 SHOULDER STRAP R070600 P1090139 P0090034 Ber ee hN MICROPHONE HANGER SEMICONDUCTORS Transistors 2SA733P 2547330 25 496 2SC535A 25 945 28C1583 2SC1947 28C2026 28C2053 2SC2603E 28 27861 13 OAR eS eS BRU ke ACCESSORIES EXTERNAL POWER SUPPLY PLUG P 200 1 EXTERNAL SPEAKER PLUG 107 1 Diodes 1S188FM Ge 1SS53 Si 10D1 Si MI301 Si V05B 18597 Schottky Barrier 1SV50 Varactor 1SV68 15 69 1725 HZ6C 1L Zener 5 6 3 RD6 8EB 3 TLG205 LED TLR205 LED LCD Display H1313A FRONT PANEL CONTROLS AND SWITCHES 19 4 34 Mond SG i rese D 456789103 1 SQL The squelch control silences the receiver in the FM mode
29. DDI04SL150750V02 2 C04 K00175390 Ceramic Disc SOWV SL 39pF DD104SL390J50V02 01 02 05 06 K12171102 Ceramic Disc 50WV 0 001 uF DD105E102P50V02 C07 10 K10179016 Ceramic Disc 50WV 0 001uE DB201YB102KSL5 INDUCTOR 101 10020951 10020334 SWITCH S01 with VRO13 502 Q9000115 EWT XDBS2050B S03 N0190082 SRN3066 S04 N0190084 SRS101C Switch Unit C PB 2240 F0002240 Printed Circuit Board C0022400 PCB with S04 505 N6090028 SSHP 23 05 Switch Unit A S06 07 N6090029 SSFY P 22 07 Switch Unit A PB 2242 F0002242 Printed Circuit Board C0022420 PCB with S05 S06 S07 RECEPTACLE 101 0090243 214 755 1090193 FM MR M 46 103 07 1090005 SG8050 J04 P1090051 568512 105 _ 0090190 HEC0630 106 P1090197 568021 EE m T SPEAKER pe M4090029A 5 50 CONNECTOR POl with wire T9204140 XHP 9 P02 with wire 79204150 _ 10 __ with wire 79204160 12 P04 with wire 19204247A 13 POS with wire T9204248A 3021 05 ANTENNA 1 3000020 22771 METER M01 M0290023
30. LSB USB or CW mode the preset mode is 1 kHz per step Press the STEP button to switch to 100 Hz steps second press of this switch returns you to 1 kHz steps In the FM mode the preset is for 10 kHz steps Pressing the STEP switch selects 5 kHz steps while a second press returns you to 10 KHz steps 8 VFO Switch The VFO button selects one of the two internal VFOs on the FT 290R Upon switch on VFO A is automatically selected Press the VFO switch to select VFO B and dial up the new frequency A second press of the button releases the switch returning you to VFO A 9 CLAR This switch actjvates the receiver offset tuning feature Clarifier The clarifier allows 10 kHz of offset from the transmit frequency tuned in 100 Hz steps all modes 10 M The M Memory button is used to store a frequency in memory 11 This seven pin jack accepts microphone audio input the scanning control lines and the PTT Push to Talk control line Microphone impedance is 500 ohms 12 MEMORY The memory channel selector is used to choose any of the 10 memory channels the MS Memory Scan position scanning of the memories may be performed 13 CALL When this button is pressed FM mode only a 1800 Hz tone will be superimposed on the microphone line and the PTT switch line will be grounded activating the transmitter This allows manual length access of repeaters requiring a burst tone 14 ON AIR This ind
31. PRON SWITCHES AND JACKS 1 KEY This jack is used for the keying input line Use a miniature phone plug for connection to your telegraph key or keyer The key up voltage is 7V and the key down current 5 0 3 mA 2 LAMP BATT CHECK With this switch in the LAMP mode the front panel meter and LCD display will become illuminated for nighttime operation If the power switch on the VOL control is off this lamp will not come on thus preventing inadvertent battery discharge In the BATT mode the battery voltage is checked The meter needle should deflect at least to the dividing line between the green and white zones of the meter scale If not the batteries will require replacement or recharging 3 NB This switch activates the built in noise blanker While no blanker can be expected to eliminate all types of noise such as white noise etc this blanker should prove highly effective in minimizing pulse type noise such as that caused by automotive ignition systems 8 4 HI LOW This switch selects power outputs of 2 5 watts HI or 0 5 watt LOW 5 CASE LATCH This mechanism provides easy opening and closing of the cabinet for battery removal 6 EXT DC 13 8V Use this jack for connection to an external DC supply Never exceed 15 volts at this jack and never apply AC power of any kind at this point Also be absolutely certain that DC power of the proper polarity is applied when replacing DC plugs check to
32. T22 BATTERY HOLDER _Q9000116B C12A with wire Q9000117B 2 with wire MAIN UNIT Symbol No Part No Description PB 2235C F0002235C Printed Circuit Board C0022350 P C B with Components 01012 G1090340 MC1496P Q1019 G1090145 3357 01027 61090073 uPC575C2 Q2004 G1090072 uPC577H Q2010 G1090027 MC14001B Q3006 G1090237 uPD2819C 47 D1007 1024 1027 1030 1032 1039 1041 2011 2013 2016 2017 2026 2028 2030 3002 3004 G2090027 D2024 2025 G2090033 MI301 D2029 G2090193 RDS 6EB 3_ D3007 G2090196 HZ6C 1L_ CRYSTAL H0100992 HC 18 U 10 8115 MHz H0102288 HC 18 U 10 8093 MHz H0101100 HC 18 U 11 265 MHz H0101020 HC 18 U 10 810 MHz H0101986 HC 18 T 5 76 MHz H0102385B RW 18 T3P 18 7414 MHz i CRYSTAL FILTER XF1001 H1102021 108M30B XF1002 H1102022 10F2D 10 81 MHz CERAMIC FILTER CF1001 _ 3900171 CFG455E 1 SLFD15SA 61122 R2069 RESISTOR 110246229 Carbon Composition 1 4W GK 100215569 R2066 100215100 Film 1 8W VJ 2071 300215470 n R2059 710246560 Composition 1 4W GK R1
33. a reading of 10 81 MHz 100 Hz and be sure its level is approximately 500 mV rms Now adjust T3001 TC2001 for maximum reading on the wattmeter ALC Alignment Set the MODE switch to FM and close the PTT switch Adjust VR oo for a reading of 2 5 watts on the wattmeter PO Meter Alignment Set the MODE switch to FM and close the PTT switch Adjust VR5oo so that the PO meter indicator reaches the middle of the green zone with a 2 5 watt reading on the wattmeter FM Deviation Alignment Assemble the test equipment and the transceiver as shown in Figure 2 Connect an audio generator to the MIC jack and apply a 1 kHz 15 mV signal 42 4 b a b c Directional Coupler Dummy Load Deviation Meter O TRANSCEIVER Oscillo scope Audio Oscillator Figure 2 Now close the PTT switch and adjust VRjo for a deviation of 4 5 kHz while observing the signal waveform on the scope Reduce the amplitude of the audio generator to 1 5 mV and check to see that the linear detector shows 3 5 kHz and that the signal waveform on the scope is not distorted Low Power Adjustment With the dummy load wattmeter connected to the ANT jack set the MODE switch to FM and the HI LOW switch to the LOW position Close the PTT switch and adjust for an output of 0 5 watts SSB Modulator Output Transformer Adjustment Wit
34. and MR PRI buttons again 5 If the scan stop switch is set to the MAN position the CPU will have no instructions for halting the scan Simply press the DIAL or MR button to select the desired channel under this mode of operation If you hit the PTT switch during manual priority channel operation the checking of the priority channel will be delayed by five seconds MEMORY SPLIT OPERATION The memory split operation mode is useful for covering unusual repeater splits or other occasions where the receive frequency may be fixed but the transmit frequency is variable In this mode you receive on a memory channel while transmitting on the VFO 1 Store the desired receive frequency into a memory channel 2 Dial up the desired transmit frequency on the main dial 3 Now press the yellow F and DIAL S buttons You will be receiving on the memory while transmitting on the VFO 4 For transmitting purposes either VFO A or VFO B may be used Set the VFO selector as needed 23 consisting of 28C535A 1005 is mixed with a local signal delivered from the 28C1583 and 28C2786L where the signal is amplified to a level consisting of Dyo24 and 5025 MI301 and is then resulting in a 10 81 MHz first IF signal 3SK59Y where the signal is amplified with CIRCUIT DESCRIPTION The block diagram and circuit description to follow will provide you with a better understanding of this transcei
35. ations where the microphone is not the most efficient means of activating the transmitter 5 The clarifier may be used for following unstable signals The clarifier allows offset tuning in 100 Hz steps away from the transmit frequency See the section on clarifier operation for details 18 CLARIFIER OPERATION Offset tuning is provided on receive for tracking of unstable or Doppler shifted signals The clarifier may be used either VFO frequencies or memory frequencies To activate the clarifier push the button once The letters will appear on the digital display Now tune the receiver as needed to follow the unstable signal The synthesizer automatically programs 100 Hz steps for clarifier operation A frequency shift of up to 10 kHz can be accomplish ed by using the clarifier When you close the PTT switch the digital display will revert to the frequency programmed before the clarifier was switched on In other words your transmit frequency has remained unchanged while your receive frequency has been varied second press of the button will cancel clarifier operation If the CLAR button is then pressed again switching the clarifier back on the clarifier is zeroed to the original operating frequency before any offset not to the offset frequency tuned previously THE UP DWN CONTROLS ON THE MICROPHONE MAY BE USED FOR SCANNING DURING CLARIFIER OPERATION VFO SELECTION Tw
36. be sure that the plug is wired correctly as there is little standardization in the world for the power plug used for the FT 290R Failure to observe these simple precautions will void any and all warranties on this equipment 7 CHG The external charge jack accepts charging voltage from the NC 1 1B C battery charger Option When using alkaline or other dry cell batteries do not attempt to recharge them Use only C size Ni Cd cells available from your Yaesu dealer if you desire rechargeable cells 8 ANT This is a UHF type connector for use with an external antenna of 50 ohms impedance nominal When using an external antenna the internal whip should be telescoped fully inside the radio 79 11 T Ep L NC 11 CHARGER PLUG CONNECTIONS KEY PLUG CONNECTION EXT DC PLUG CONNECTIONS 9 SIDE PANEL JACKS 1 STAND BY This jack is wired in parallel with the PTT line of the microphone allowing the use of a footswitch to activate the transmitter 2 EXT SP Use this jack to connect an external speaker The output impedance is 8 ohms STAND BY SHOULDER STRAP ATTACHMENT AND REMOVAL ATTACHMENT REMOVAL Press pin into hole then pull up tab Press with thumb while lifting tab swivel ing back and forth slightly until pin disengages 10 T EN INTERNAL SWITCHES 1 TSQL When the optional tone squelch unit is installed this switch will place the
37. completely the many features of the exciting new FT 290R With proper care in operation this equipment will provide many years of reliable performance SPECIFICATIONS GENERAL Frequency coverage 144 148 MHz 144 146 MHz as per your local regulations Modes of operation SSB USB LSB CW and FM Synthesizer steps SSB CW 100 Hz 1 KHz FM 5 kHz 10 kHz 12 5 kHz 25 kHz depending on local requirements Power requirements 8 size dry battery cells or 8 C size Ni Cd battery cells External 8 5 15 2 V DC Memory backup built in lithium bat tery cell Current consumption 60mA on receive 800mA on transmit 2 5W RF FM Antenna impedance 50 ohms Case size 58 H x 150 W x 195 D mm Weight 1 3kg without batteries TRANSMITTER Power output 2 5 watts at 12 volts Carrier suppression Better than 40 dB Spurious radiation Better than 60 dB Unwanted sideband suppression Better than 40 dB Tone burst frequency 1800 Hz U S A model 1750 Hz other models Frequency response 300 2700 Hz 6 dB FM deviation 5 kHz Microphone impedance 600 ohms x X lt gt gt 5 c c RECEIVER Circuit type SSB CW Single conversion superheterodyne FM Double conversion superheterodyne Intermediate frequencies Ist IF 10 81 MHz 2nd IF 455 kHz FM Sensitivity SSB CW 0 5uV for 20 dB S N FM 0 25uV for 12 dB SINAD Selectivity SSB
38. h a dummy load wattmeter connected to the ANT jack set the MODE switch to either USB or LSB Set to the center of its range and apply a 1 kHz 1 mV signal from the audio generator to the MIC jack Adjust Tig for maximum power output 43 7 558 Carrier Point Adjustment b Set the MODE switch to FM and close the PTT switch Adjust so that a minimum spurious level appears 10 81 MHz from the carrier on the spectrum analyzer a Apply a 1 kHz 1 2 mV signal from the audio generator to the MIC jack and adjust for an output of 2 5 watts b Set the MODE switch to USB and the frequency of the audio generator to 300 Hz Adjust TCioo2 for an output of 0 6 watts 11 Battery Check c the MODE switch to LSB and adjust for an output a Apply a DC 9V to the EXT DC 13 8V terminal from an external power supply b Set the LAMP BATT CHECK switch on the REAR PANEL to the 8 Carrier Balance Adjustment BATT CHECK position a Temporarily short the PTT line at the MIC jack using a jumper wire c not the microphone b Monitor the carrier on monitor receiver and adjust VRioo for minimum S meter reading or minimum signal level if no S meter reading occurs c Switch the MODE switch between USB and LSB and compare the carrier levels of both modes and again adjust 50 as to achieve good carrier nulling on both modes Adjust so that the PO meter deflects t
39. he backup mode 20 Ten memory channels are available for storage and recall of favorite operating frequencies The procedure for entry and recall of memory channels is extremely simple Push the DIAL switch for normal tuning using the main tuning dial When you have found a frequency you wish to store in memory for example 146 520 MHz rotate the MEMORY switch to 1 channel 1 and push the M memory store button If you wish to store 146 490 MHz in channel 2 rotate the main dial to that frequency rotate the MEMORY switch to channel 2 and push M and so forth This procedure may be repeated for all 10 memory channels To recall these frequencies push the MR button memory recall and rotate the MEMORY switch to select the desired channel One push of the M button will keep you on memory recall operation until the DIAL button is pushed again to return you to main dial tuning Note that there is no formal erasure procedure for memory channels When you push the M button the previous frequency stored in that position will be erased Until a frequency is programmed into a memory channel from initial switch on of the transceiver 147 000 MHz will be preset in all memory channels SCANNER OPERATION The UP DOWN scanning controls on the microphone may be used to control the operating frequency When in the DIAL mode one push of the UP button will cause the frequency to advance upward by one ste
40. hly so as to understand all of the features that are made available Note that off frequency operation could occur without proper setting of the controls because of the many options the operator has for frequency selection INITIAL CHECK Before operating the transceiver be certain that the necessary batteries are installed in the case as described previously Extend fully the built in telescoping whip antenna if used If an external antenna is used be certain that the internal whip antenna is fully nested into the FT 290R If an external voltage source is used instead of batteries confirm that the proper DC voltage is being applied to the rear panel jack and that the proper polarity is used FREQUENCY READOUT Frequency display is provided by a five digit Liquid Crystal Display LCD system Resolution of the last five digits of the operating frequency is provided to 0 1 kHz When operating on a memory channel the letter M will appear on the left side of the display The memory channel number will not be shown as it is already shown on the selector switch labeling The actual memorized frequency will be displayed however 14 tony Saah by ham directory info ham SSB OPERATION Preset the controls and switches as follows VOL OFF Fully counterclockwise SQL Fully counterclockwise MODE Desired mode USB or LSB MEMORY Channel 1 LAMP Rear apron OFF NB 039 OFF HI
41. icator lights up while transmitting 15 BUSY This indicator lights up when the main squelch is opened up by an incoming signal 16 DIAL S When the DIAL S button alone is pushed tuning is accomplished by the main dial on either VFO A or VFO B If the F button is pushed then the DIAL S button the memory split mode will be selected for receiving on the memory while transmitting on the VFO 17 DIGITAL DISPLAY The digital display uses a liquid crystal display for indication of the operating frequency and mode The frequency readout displays the last five digits of the operating frequency with resolution to 0 1 kHz Indicators are also provided for indication of clarifier operation memory channel operation or memory split operation on transmit 18 S PO The meter allows determination of incoming signal strength and relative power output The meter is also used for checking battery operation 19 WHIP ANTENNA The builtin whip antenna is satisfactory for most portable operation When using an external antenna the whip should be telescoped fully into the transceiver Conversely when an external antenna is not used the whip should always be fully extended Viewed from Side Pin G 49 Veet ere 4 Jd Rue YM 47 MICROPHONE PLUG CONNECTIONS Scanned by IW1AXR Downloaded by gt de 2 5 5 d REAR A
42. ier gain is preset in this transceiver and requires no further adjustment for normal operation 15 If the station you are in contact with begins to drift you may follow the station by activating the receiver offset tuning control CLARIFIER Push the CLAR button and then rotate the main tuning dial or push the scanning controls until the desired frequency is reached In the CLAR mode the synthesizer automatically is set to the 100 Hz step mode and the STEP button is disabled The clarifier leaves the transmit frequency unchanged Push the CLAR button again to return to normal operation with the clarifier off If you switch the clarifier on again the receiver will not return to the last offset frequency but rather will initiate on the current operating frequency For satellite operation it is possible for the transmit frequency to be varied while transmitting If pulse type noise is encountered the rear apron NB Noise Blanker switch may be activated While no noise blanker can be expected to eliminate all types of atmospheric and man made noise encountered in day to day operation the FT 290R noise blanker should be quite helpful in reducing interference caused by pulse noise such as that produced by automobile ignition systems To reduce power for local communication place the HI LOW power switch in the LOW position In this position the PEP output power is approximate ly 500 mW Battery consumption will be greatly reduced
43. ion has been carefully analyzed and the fault has definitely been traced to misalignment rather than part failure Service work must only be performed by experienced personnel using the proper test equipment Never align this transceiver without having a 50 ohm dummy load connected to the antenna jack Troubleshooting using an antenna can result in mis leading indications on the test equipment EQUIPMENT REQUIRED l RF Signal Generator Hewlett Packard Model 8640B or equivalent with one volt output at 50 ohms and frequency coverage to 150 MHz 2 Vacuum Tube Voltmeter VTVM Hewlett Packard Model 410B or equivalent Dummy Load Wattmeter Yaesu YP 150Z or equivalent AF Signal Generator Hewlett Packard Model 200AB or equivalent IF Sweep Generator capable of output at 10 81 MHz RF Sweep Generator capable of output at 143 149 MHz Oscilloscope Hewlett Packard Model 1740A or equivalent FM Deviation Meter coverage to 144 148 MHz FY Precision Frequency Counter Yaesu Model YC 500E or equivalent with resolution to 0 01 and frequency coverage to 150 MHz 32 b ectory info diac tony Saah by Dory ham po EAE EE CONTROL NIT KEYBOARD UNIT d zs 1 Pw TOP VIEW pee cd KEYBOARD j UNIT ns 1 ri CONTROL UNIT AVR UNIT SWITCH B UNIT SWITCH A Uu
44. o VFOs are available on the FT 290R for split frequency operation The VFO selector button is the largest of the eight mode selector buttons on the front panel of the FT 290R This switch is a push push type not the momentary type used for the other mode selector buttons For VFO B operation push the VFO button once the switch will hold inward and the desired frequency may then be dialed up Be certain of course that you are in the DIAL mode To return to VFO A simply push the VFO button again to release the switch 19 It is not possible to receive on one VFO while transmitting on another For frequency splits of 10 kHz or less use the clarifier to achieve this function Otherwise use the MEMORY SPLIT mode described elsewhere in this manual NOTE REGARDING BACKUP OPERATION When a backup battery or main batteries are first installed in the FT 290R after service or replacement it is necessary to reset the microcomputer properly Failure to follow a simple sequence of steps may cause erratic operation 1 Set both the VOL and memory backup switches memory backup switch is located inside the cabinet as shown on page 11 to OFF 2 Replace the memory backup battery and main batteries if removed 3 Tum the VOL control out of the click stop turning the transceiver ON 4 Now turn the backup switch to ON The CPU is now reset and the backup switch may be left on indefinitely owing to the very low current drain in t
45. o the left side of the green zone 9 CW Carrier Frequency Adjustment a Set the MODE switch to CW b Connect a frequency counter to the cathode of c Connect a CW key to the KEY jack and then close the PTT switch and KEY simultaneously Adjust TC oo for a frequency of exactly 10 8093 MHz d Now set the frequency to 145 100 0 MHz and place the input lead from the counter to the dummy load 18 read the transmit frequency Then adjust for a reading of 145 100 0 MHz 100 Hz on the VR frequency counter at 9V 10 TX Balanced Mixer Alignment 15 If you not have spectrum analyzer do not perform this alignment as serious spurious radiation will result Ti a Connect a directional coupler between the transceiver and dummy i load wattmeter and feed the coupled output from the directional 25 coupler to the spectrum analyzer 44 45 Symbol Part No PARTS LIST MAIN CHASSIS Description DIODE __ DOL 02 G2090001 Si 1001 _ D03 62090027 Si 15553 D04 G2090034 Si 005 RESISTOR RO2 101215101 Carbon Film i8W TJ 1009 101215103 10kQ POTENTIOMETER VRO1 with 01 162800057 K12B61004 5N1211 5KB 10KA CAPACITOR C03 K00175150 Ceramic Disc SOWV SL 15pF
46. odel B 145 MHz and adjust the cores of for maximum deflection on the S meter S meter Alignment Set the MODE switch to USB or LSB and preset to the center position Apply 15 dBu signal from the signal generator and adjust for a reading of S9 on the S meter Now remove the signal from the signal generator and adjust so the S meter indicates exactly O Repeat steps b and c a few times to obtain the proper S meter deflection N B Alignment Set the MODE switch to CW and apply a 5 dBu signal from the signal generator Connect the lead of DC voltmeter to the cathode of Doos and the 2 lead to the 6 8 volts line Adjust the cores of T1997 for maximum deflection on the voltmeter Next reduce the amplitude of the signal generator to O dBu and check the voltmeter which should show approximately 0 03 volts 39 1009 T 1001 21006 T1013 AF OUT T1007 1019 1006 1008 1002 1003 1004 1002 T 1005 Dio 1012 1001 VR 1003 ____ I 4 V Roo TCi 1 T1010 1 www hamdirectory info Saah by Day ham E 1003 CF 1001 1023 es Q D1021 9 1001 1009 e 1005 gt Qio G T 1008 01006 RECEIVER SECTION ALIGNMENT POINTS 4 2
47. p of the synthesizer the step size being programmed by the mode switch and the STEP button If you hold the UP button down for more than 1 2 second the scanner will become engaged and you will begin scanning up the band Push the UP or DN button or the PTT switch to halt the scan 21 Scanning toward a lower frequency is achieved by using the same procedure only using the DN button on the microphone To scan only the memory channels rotate the MEMORY selector to either of the MS Memory Scan positions and press the MR button Now when you push and hold the UP or DN button the scanner will search the memory channels only Manual halting of the scan is accomplished by pushing the UP DN or PTT switches as before Inside the case of the radio the BUSY MAN CLEAR switch allows selection of one of three scan halt modes In the MAN Manual position scanning is halted as discussed above If the BUSY position is selected see Page 11 the scanner will search until a busy channel one occupied by a station strong enough to break the main squelch is received The scan will then pause on that frequency for five seconds If you choose to stay on that frequency press one of the scan control buttons or the PTT switch While in the PAUSE mode the decimal point farthest to the right will blink when you push a button to halt the resumption of the scan the blinking will stop To scan for a clear channel one where the squelch does not open
48. r Belt DU R0071360 Microphone Hanger P1090139 Power Plug P 200 P0090034 SP Plug C 107 MEN d RET 62 Scanned by IW1AXR Downloaded by gt Q 9 c lt 63
49. rtion of the signal is buffered by 2SK192GR and fed to the S meter amplifier 28A733Q providing a DC voltage for the S meter deflection TRANSMITTER The discussion of the signal flow on transmit will be made on a mode by mode basis SSB The audio input signal from the microphone is amplified by and 28C2603E and then delivered to an active lowpass filter 28C2603E where the unwanted frequency spectrum above 3 kHz is cut off This amplified speech signal is fed to balanced modulator MC1496P where the audio signal modulates the 10 81 MHz carrier signal delivered from the carrier oscillator 25 2603 resulting in 10 81 MHz double sideband signal The DSB signal is amplified by a buffer Qiooo 2SK192GR and delivered to crystal filter 10220 where the unwanted sideband is sliced out resulting in a single sideband signal This SSB signal is then amplified by 3SK73Y and delivered to a mixer Qyo17 and 2SK192GR where the SSB signal is mixed with a local signal from the PLL local oscillator buffer 3002 GSK73Y resulting in a 144 148 MHz SSB signal 27 The SSB signal passes through an auto tuning filter consisting of 2 and varactor diode Diois Djo21 where the resonant frequency is tuned exactly to the transmitting frequency thus minimizing spurious radia tion The signal is then amplified b
50. tected by Dios ISI88FM producing a DC voltage This voltage activates a switch which grounds the base of 25 2603 to turn off the AF output from the discriminator to the AF amplifier When a carrier is present in the 455 kHz IF the noise is removed from the discriminator and the audio amplifier then returns to normal operation The squelch threshold sensitivity is set by SSB CW mode IF signals from are passed through a crystal filter XFioo which has a very high shape factor to reduce signals on adjacent frequencies The filtered SSB signal is amplified by and Qion 3SK73Y and then fed to the balanced demodulator 0101 MC1496P where a carrier signal is applied from carrier oscillator Qiois 28C2603E resulting in an AF signal which is then fed to the AF amplifier The AF amplifier consists of 0 05 2SC2603E and uPC575C 2 The AF signal from the FM discriminator and the balanced demodulator are amplified by 01925 and fed to active lowpass filter Qio2 where the AF signal above 3 kHz is cut off The AF signal is then delivered to AF power amplifier providing approximately 1 watt of audio output to the speaker 26 S METER AND AGC CIRCUITS A portion of the IF signal from is rectified by and 18188FM and amplified by 2SC2603E This amplified DC voltage controls gate 2 of MOS FET s in the IF amplifier A po
51. ver Please refer to the block and excellent rejection of cross modulation and intermodulation The amplified signal is then fed through three sections of Auto tuning filter to reject unwanted signals which may cause intermodulation at the Ist Mixer 1002 which acts as a switch driven by the NB noise blanker circuit The amplified signal from is fed to IF amplifiers for FM or Cio for AGC purposes The AGC voltage is used to control the gain of sufficient to drive the noise blanker rectifier and noise blanker AGC circuits noise amplifier is rectified by and 1S188FM producing DC A portion of the RF signal from monolithic crystal filter is fed to a When the carrier of a noise free modulated signal is received the signal at the voltage The DC voltage is amplified by Qioo7 28C2603E which charges The first IF signal passes through a pair of monolithic crystal filters 1001 108M30B which have bandwidths of 15 kHz It is then amplified by The RF signal from the antenna jack is applied to a lowpass filter and 2 T o 9 2 5 m aS a 5 Eh gt 5 5 5 Qut 3u 2 E E Q o 5 S 25 5b 5 Tou S o en o 5 S E E oz 26 ed 4 gt 5 un gt a A e E M m o o o e ea A Ra
52. when no stations are being received on the channel in use The SQL control should only be advanced to the threshold point of background noise silencing further advancement of this control will lead to reduced sensitivity to weak signals 2 VOL This is the audio gain control for the receiver as well as the main ON OFF switch for the transceiver 3 MODE This switch selects the desired mode LSB USB CW or FM 4 MAIN DIAL The main tuning dial is used for selection of operating frequencies using the two main VFOs or the clarifier In the LSB USB and CW modes synthesizer steps of 100 Hz or 1 kHz are programmed while on FM the channel steps are 5 kHz or 10 each In the clarifier mode the synthe sizer moves in 100 Hz steps 5 MR PRI This switch selects either the memory recall mode or priority channel operation If only the MR PRI switch is pressed the memory channel selected by the MEMORY rotary switch will be activated If the yellow F button is first pressed then the MR PRI button priority channel operation will be selected 6 F The yellow Function button activates either the priority channel mode or the memory split mode The F button itself does not select a mode but it programs the microprocessor to select the mode labeled in yellow letters in either of the two switches immediately above the F button DIAL S or MR PRI 7 STEP This switch selects the desired synthesizer steps In the
53. y four stages of straight amplifier consisting of GSK59GR 25 2026 28C2053 and 28C1947 providing a power output of 2 5 watts over the range of 144 148 MHz Finally this signal passes through an RF diode switch and lowpass filter to the ANT connector and built in telescoping antenna FM The speech signal from the microphone is amplified and limited in amplitude by uPC577H It is then fed through a lowpass filter to eliminate harmonics above the speech range caused by clipping Next it goes to a frequency modulator consisting of Q2o95 28C2786L and 5 18V68 where the 10 81 MHz oscillating frequency is modulated corresponding to the AF signal from Thus FM signal of 10 81 MHz is produced This signal is then delivered to the IF amplifier and the signal path then becomes identical to that of the SSB signal CW For CW the 10 8093 MHz carrier is generated by 28C2603E and delivered to the balanced modulator The key line is connected to keying control IC quad NOR gate MC14001B which drives keying switch 28C2603E to control the DC bias voltage sent to the source of and As a result the RF signal is turned on and off From this point the signal path is identical to that of the SSB signal The control signal from 10 is also fed to the sidetone oscillator consisting of two sections of gate circuits in 1
54. y is required as the FT 290R will tolerate the slightly elevated voltage of these batteries as compared to Ni Cd cells The install batteries set the rear panel lever to OPEN to unlock the case The bottom cover may then be carefully removed exposing the battery holder Install the eight new cells being absolutely certain to observe the proper polarity WARNING Serious damage can occur if incorrect battery polarity is used Our warranty does not cover damage caused by incorrect polarity the battery compartment 12 If Ni Cd cells used the optional NC 11B C battery charger may be used to return the cells to a full charge Allow the cells to discharge minimum operating voltage before recharging them If the cells are only partially exhausted and repeatedly recharged in this condition they may develop a memory for this level and not provide full discharge capability Ni Cd cells suitable for use in the FT 290R are available from your Yaesu dealer Ask also for the MMB 11 Mobile Mounting Bracket FL 2010 Linear Amplifier YM 49 and YM 50 microphones and CSC 1A vinyl carrying case for the FT 290R NC 11B 117V AC NC 11C 220 234V FT 290R CSC 1A YM 47 FT 290R FL 2010 MMB 11 YM 47 13 OPERATION The tuning procedure for this transceiver is not complicated However because microcomputer circuitry is used extensively throughout the trans ceiver this section should be read thoroug
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