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1. At that time the Motrac series of mobile equipment was very popular Depending on the model these normally used one or two of the 6883A 8032 tubes It was only in the very latest models HHT E series LHT series and MHT series that Motorola had redesigned the equipment to use the 6883B 8032A 8552 tubes Around late 1976 or early 1977 Motorola decided to eliminate some of the tube types that they were stocking at the Schamburg Illinois parts depot Thus they started shipping 8552 tubes in boxes that were marked as 8032 The Motrac is unique in the fact that you cannot see the tubes when they are in operation they are enclosed in a metal heat sink In fact it is difficult to even tune a Motrac when the heat sink is not in place We went through from 50 to over 100 of the 8032 type tubes per week and within days were down to using the 8552 tubes in the 8032 boxes Within a very few days of starting to use the 8552 tubes we started receiving complaints that virtually every Motrac unit that was received by customers arrived with one or both tubes broken Prior to this we had never had a single complaint Upon investigation we found that the 8552 tubes had so many parasitic oscillations that they were getting so hot that the glass envelope was being annealed This was happening within a minute or two of tune up and final quality control When the radio was subjected to normal vibrations of shipping the glas2. This board can be installed in production runs from 24 up the FT 101ZD MK3 Power Supply PB1967 Rectifier A board This board delivers all the high and low voltages used in the transceiver so be careful there are points with 900 Volts dc on this board and that voltage can do serious damage to a unsuspecting Ham to say the least Unload always the condensors preferabely with a resistor before starting to work at this circuits The board is positioned in the underside of the transceiver and delivers the various low voltages 6 8 12 Volt dc and the 900Vdc for the Power Amplifier This board is used in all models of the FT 101ZD PB1968 Rectifier B board This board delivers the bias voltages of the PA unit the 150 160 200 and 300 Vac for the driver and Power amplifier This board is mounted at the left side of the transceiver On this board is also the CW keyer circuit The board is used in all models APF NOTCH unit PB2217 APFANOTC ETH The APF unit is placed in the audio circuit by the APF Notch switch on the front panel eo For APF operation forms it a selective active filter to narrow the passband of the receiver The notch function elimenates selective some audio frequencies like carriers or other interfering signals The center frequency of the APF Notch is adjustable from the front This unit is used only in the MK3 model 12BY7A Driver board PB 1714A The driver board amplifies the SSB CW signal and fe
3. 41 POWER HEATER Pi KTM MR R PO N L ya F C gt Sl c aK E SEKAR R are C x o a A VT nh e MER 14 A i a MM 160 i ida JR TU AT Presented by The FT 101 history The Yaesu FT 101 series transceivers produced in 1970 1978 were a very good alternative for the very expensive American made receivers and transmitters of the time They were full of useful options for which you had to pay much extra if available in other ham equipment Build like a battleship with a modular construction it was easy to repair and the big numbers which are still around prove the sound work of the Yaesu engineers at the time The FT 101 series was very successful and there were many versions of it starting with the FT 101 released in 1970 to the FT 101F who was released in 1978 See the FT 101 page for more information for the FT 101 series of transceivers The Yaesu FT 101ZD was brought on the market in 1979 as a low cost alternative for the FT 901ZD which is the real descendant of Yaesu s famous FT 101 series of transceivers As Yaesu already had a very good reputation for performance and durability it is no wonder that the new series transceivers became very popular in the ham community special in Europe because the high price of the available American equipment and the high import taxes on them and the fact that there where almost no agents prohibited a broad distribution of American equipment I stil
4. FT 101ZD in a first class condition Switching the fan When the rig is mostly used on receive there is no need to let the PA cooling fan run continuous I switch the fan with the heaters On Off switch Pick up the 12V of the heater circuit at the accessory socket at the rear of the transceiver and rectify it with a diode and a suitable elco Use the DC voltage to switch a small relay 1 used a small 12V reed relay with 1 contact Use a suitable series resistor to limit the current With the relaycontact you can now switch one 100 Volt connection to the fan socket I made this modification 25 years ago and it works still as a charm There is room enough in the back of the transceiver to mount the relay and the couple of small parts you need in a neat manner Source PADPGA Improving second Double Balanced Mixer On the AF board is the double balanced mixer DO2 to DO5 they are 4x 154007 Replace these with 4x Motorola MBD 702 diodes and the adjust VRO1 and TCO2 for the best carrier balance It should be possible to null the carrier almost completely Source G3TJP First mixer overload only FT 101ZD MK2 and MK3 board PB 2154 used after run 17xxxx RF board Improve the dynamic range of the first mixer by modifying the T Pad attenuator on the input as follows Change R8 120R to 36R change R9 and R10 10R to 27R Reset overall gain on IF board using VRO2 which is the source load of Q15 Source G3TJP Improved Fine tuning
5. Shunt the clarifier control with a 4k7 or 5k6 resistor then recentre its action by adjusting VRO1 This mod reduces the control s range Source G3TJP Tips from Kiwi land On 10 meters the transmitter takes off on HF or with the transverter beiing used The problem is dry joints or earthing points around the 12BY7 Resolder all connections on and around the 12BY7 board Source ZL3MH This manual was downloaded from Fox Tango International 20 http www foxtango org Fault blows main fuse every 0 5 to up to 6 hours and is not the 6146 s flashing over There are vertical type caps in PB 1968 and the internal fluid runs down and arc across the narrow gap in the caps 300 Volt screen supply a common problem in TV sets Replace caps C1001 C1002 C1003 and C1004 they are all 10uF 450 Volts Source ZL3MH Replace the 1000pf condensor from the plate of the driver tube to the grids of the 6146B s This a precautionary measure as the FT 101 series had problems here Source ZL3MH The Noise Blanker stops working sometimes Wiss It appears to be a dry joint on plug pins of the Noise Blanker Fixed channel board The fix is to solder around the connections of the board Source ZL3MH I had the same type of dry joints in the cable connectors of the audio board and the cable connectors of the IF board there where 4 A several pins with craters around See picture This gives all kinds of curious problems Resoldering is the
6. IF rx and tx monitoring is not possible with the FT 101ZD combination SP 901P speaker hybrid phone patch The SP 901P features a shaped response loudspeaker and a hybrid phone patch allowing efficient operation during patches Styling and size match the FT 101ZD and FT 901DM series FC 901 Antenne coupler The FC 901 antenna coupler presents a 50 ohm load to your FT 101ZD transceiver all across the band 3 coax fed and one random wire antenna may be accomodated SWR and Power metering allow quick determination of proper matching conditions This manual was downloaded from Fox Tango International http www foxtango org The r 16 NE SE NOS ae t PE Sy 1 k IW aan TUNA Way NN Y 15 A Si hon Kimry e i gt ebuilt PA with 6146A tubes This manual was downloaded from Fox Tango International http www foxtango org RN ec S ud L Qs E A E y A Internet buy Recently I buyed a FT 101Z on the Internet for a reasonable price intended more or less as spare for my FT 101ZD that I own for almost 26 years now obtained new in 1979 one of the first production runs The normal asking price overhere is around 350 Euros depending on condition The price at 175 Euro around 200 was good The distance to the owner was under 100 Km making collecting possible That way I could see what I got it is not the first time that the pictures used by the auction have nothing to
7. VFO shift range is 8khz Up to 6 crystal controlled channels may be installed The necessary crystals have to be in the 5 5 5 Mhz range FV 101DM external VFO This VFO has twelve memories up down scanning keyboard frequency entry and receiver offset tuning in 10hz steps This provides smooth and precise tuning for SSB and CW Either the keyboard main tuning knob or up down scanning buttons can be used for quick QSY to you preferred operation frequency Up to four of you most used memory channels can be protected from overwriting when you store frequencies The two loop PLL circuit is designed to produce a crisp clean output signal for a spurious free receiver and transmitter This VFO can only be used with the FT 101ZD MK3 serial numbers above 240001 FL2100Z Linear Amplifier The FL 2100 is special designed for the FT 101ZD transceiver It uses two rugged 572B T160 transmitting triodes in a class AB2 grounded grid configuration Power input is 1200 watts PEP on SSB and 1KW on CW on all bands including the WARC bands 10 18 and 24 Mhz The linear has 2 fans for cooling the final tubes and special protection circuits for the output tubes and the tank circuit During standby is the antenne switched to the transceiver and the built in SWR meter allows monitoring of the feedline during either amplifier or exciter only operation The heavy duty powersupply requires no warm up time and has excellent regulation This manual was downlo
8. and new FT 901 so popular Altough the construction of the FT 101ZD was simpler the transceiver was packed with useful features that appealed to many hams including myself I bought one in 1979 and still use it almost daily It had a very sensitive receiver SSB and CW modes a digital display very liniair VFO smooth tuning a good set of filters a PA with real transmitting tubes 6146B s speech processor IF shift with passbands between 300hz and 2 4khz a clarifier a calibrator and a noise blanker making it a very complete package for a very reasonable price Later models had also AF notch peak filters WARC bands and AM FM capability There were outputs for connection to a transverter and liniar amplifier inputs for a second VFO and phone patch It was one of the best buys you could made at the time The FT 901 had even more bells amp whistles but had also a 1000 higher pricetag The transceiver is very well build with good quality components and if used normally will last forever Weight is in excess of 15 kg due the built in power supply giving it the feel of a battleship The powersupply can be fed from 100 110 117 or 200 220 235 Volts 50 60hz and with the optional switching unit even from 13 8 Vdc altough you need a heavy duty car battery current in voice peaks around 20 Amps MUA i HIPAA ULL MMA AAA 7 HMMM d FUMA AAA AAA a K ZIHI gt MTL Specifications FT 101Z FT 101ZD Type Amateur HF
9. do with the actual set Well the set was also a early version from 1979 so in view of spares for my own transceiver it was ok It looked nice enough some scratches on the top and sides but a nice front After removing the cover I saw that the cover of the PA was missing and that the neutralizing condenser was not connected The receiver worked ok I could test that with the griddipper that I always take with me for this purpose The Ham was using it for the reception of weather cards at the time but had buyed a transceiver with a general coverage receiver for a better coverage The FT 101Z had of course a analog display and was with the optional CW filter The overall sight of the interior was very nice and at first sight I saw no modifications The original crystals were there for all amateurbands the first thing to look for because many sets are converted to 11 metres and have had a life of hard labour Only the PA was a mess it had been repaired but in a very crummy way so I had to restore it back to the original form Some wires were half molten and the original wiring was changed I could not test the set on the air or at a dummy because the seller had only a piece of wire as antenne The tubes were glowing so I took the set at home After some cleaning and inspecting there were no further surprises only a rewired mike connector and some scratchy switches and potmeters The components including power supply condensers and solder j
10. that is superior for operation at least through 10 meters That is the 6293 This tube was designed for pulse service and is rated at 1 Kilowatt pulse power input The primary difference between these and the normal 6146 is that the plate is much heavier in its construction Back in the late 1950s and early 1960s we would almost kill to get our hands on a pair of these for our DX 100s etc The 6293 outlasts the 6146 in normal service by at least 5 times and often more than 10 times the life of the tube These tubes show up at hamfests swap meets etc from time to time If you see some of these definitely glomp onto them The 12 volt equivalent of the 6146 is the 6883 the equivalent of the 6146A is the 6883A and the 6146B is the 6883B Now there are the tubes that were manufactured for FM commercial service These series go as follows 6883 6883A 8032 6883B 8032A 8552 Again most of these are cross branded with all of the tube numbers that are equivalent From 1970 until late 1979 when Motorola went out of the reconditioned equipment business I owned the Motorola reconditioned equipment center for the south central United States We reconditioned Motorola FM equipment for 14 states everything that Motorola sold reconditioned that was exported and everything that was sold to the United States Government this was the height of Viet Nam and the Government did buy reconditioned equipment
11. transceiver Frequency Range 10 160m early models had no WARC bands Mode SSB CW later models also AM or FM RF Power output SSB CW 100W 35W Sensitivity 0 25 uV 10db S n 0 5 uV 10db S n Selectivity 2 4 khz 6db 4 khz 60db 600 or 300 hz optional Image rejection 60 db 160 15m 50 db 10m Display analog dial FT 101ZD analog digital dial Power Mains 100 235 V ac 50 60hz 13 8 Vdc option Current drain DC Receive 5 5 Amps 1 1 Amps with heater off Transmit Max 21 Amps Impedance 50 75 ohms SO 239 connector Dimensions 345 157 326 mm W H D Weight 15 kilograms Manufactured 1979 1982 Accessoires FV 101Z external VFO FV 101DM external scanning VFO FL 2100Z Linear Amplifier 1200W SSB 1000W CW SP 901P External Speaker Phone Patch FC 901 Antenna Coupler The FT 101ZD is updated several times during its lifetime and there are in fact 4 different types using the same designator By the introduction in 1979 the transceiver had only SSB and CW later there was a AM tx rx option still later the Warc bands were introduced and the last version had it all including a optional AM or FM board and Audio notch peak filter The later models have more features so they are more in demand and are normally higher priced in auctions or on the internet It seems difficult to see what the difference is between the first and last models because there is not much changed on the front Fortunately there
12. 0 15 and 10m 160 80 40 20 15 and 10m 160 80 40 30 20 17 15 12 and 10m 10A s 10B 10C l 10D JJ YF WWV R JJ YF WWV AUX UX PROC ATT20dB AGC S The switchboard in all models of the FT 101ZD has the same functions but in the MKO MK1 and MK2 models they have black tumblers in the Mk3 they have silver tips fitting by the All models have a width control for The MK3 model has SSB CW and silver rings on the knobs varying the passband of the IF AM or FM and covers the bands filter s the MK3 has additional a 160 80 40 30 20 17 15 12 and 10m audio APF Notch filter C HF SSB TRANSCEIVER APF NOTCH WIDTH AGE ue es ww PROC ATT 204B Nil s PO ps A LA 7 fo F IC OFF D Wi Vue C era Ta See 10dB OFF ALC MARK __ APF NOTCH WIDTH This manual was downloaded from Fox Tango International gt U PRESELECT RF GAIN SAP GAIN B PRESELECT AF GAIN RF GAIN 4 6 E AX e CLARIFIER 0 at aw t E aN gt a TT E 2 a III WY y L AUX The Bandswitch of the MKO and MK1 have 11 positions for the standard amateurs bands 160 80 40 20 15 10m a receive only position for 5 5 500 Mhz and a position for a optional band The MK2 and MK3 bandswitch has 12 positions for the 160 80 40 30 20 17 15 12 and 10M bands so including the WARC bands The Preselector and the Plate tuning have in the MKO and MK1 positions for the old hambands in the MK2
13. 21 28mhz Some units had a four way tag strip near the mic i p socket the two centre earth connections should be connected together Incorrect frequency display on one band only Suspect the local osc xtal for that band Poor rx tx on one band only Local osc xtal as above 1im reconversion These rigs were sometimes converted for illegal CB use This usually involved replacing 28 5 30 MHz with 26 5 to 28 MHz A few rigs are still around in this state and will require re converting back to 10 metres This will require the replacement of the local oscillator crystals and re alignment Realignment should not be omitted as the rigs may intermittently fail to operate correctly if it is Change required local osc xtals for the original types and the local osc must be re aligned to ensure continued reliable operation Hum on rx when volume control at min This is usually caused by a hum loop If there are two earth braids connected to the v c then cut one of these Hum on tx Same as above but on mic gain control One segment of display does not light LED U S Note these are usually in sockets and are easily swapped for checking Incorrect segment illumination on one digit Digit driver IC U S Intermittent incorrect frequency display If on one band only suspect the local osc xtal on that band check alignment of osc before ordering crystal especially if fault is on 10m because it may have beiing used for illegal CB and not r
14. E HF 558 TRANSCEIVER VAESU XTT M OAIN Av oan POWER HEATER PROS ATI ROWS AGT E PO m on o U e ov a om mo ma Proms moor wiorm Baso O CLARIFIER ve T com SAS ma H Age Da e a ae 18 m HT 1 wy nn m A i kac a oy 10 4 won 1d Ed b A A His 4 gt e 19 A mar E sy ee B AJA TO A NIT FT 101ZD HIGH PERFORMANCE HF TRANSCEIVER vox Gaim ETT HF SSB TRANSCEIVER YAESU FT IQIZO POWER HEATER PROC ATT AGCS PO We orm a Om a s OFF you o AME APF NOTCH 3 WIDTH Yaesu FT 101ZD S ur vival Guide This manual was downloaded from Fox Tango International BRANDX Desired signal Desrod signal d i F i i F j Single flter IF shift systems move you from one ORM signal into another YAESU FT 10 ZD Desired signal Dosired siinal 7 lt mr a a r TS L a K pao E ee r i 2 Po _ a la a R N d 4 F Pr a a J r P x AA fp fe PE eE E F F E P j por p a P P F a a i 1 A NR A T gar aa a A dl el q La 4 eE l f La L A A 9 L LA 5 p j j j i 3 Varidble bandwidth iyitem eliminates ORM fram IF nauband A 6 n Ext poner WPS EZET a wm EXT TX EXT AX VFO CHI CH Yaesu FT 1017 ZD series transceiver FT 101ZD vage HIGH PERFORMANCE HF TRANSCEIVER Gxt tada sada Gal tHE aiia WL BIT LLE AF OAIN AF DAN Se ym T G m 0 g a
15. T 101ZD MK2 and MK3 See the table Counter Unit PB1978 PB1979 PB1980 Used in production runs 01 to 15 in the 101ZD This counter is a complete enclosed unit consisting of a display board a counter board and a count decode board The unit uses standard TTL circuits The counter has a offset programming to display the correct frequency of the carrier in a ingenious manner The counter is programmable for other offsets with dipswitches The counter uses 6 HP LED displays for a frequency readout to 100 hz PB2086A 3420 PB2098 Used in production runs 16 to the end in the 101ZD This counter uses a custom LSI chip the OKI MSM 9520RS wich has all the possibilities of the older counter including the frequency offset in one chip The rest of the board is used for the transistor digit and segment drivers The LED displays in this coun Y ter are multiplexed AM Unit PB2040 The AM print has a AM detector and audio pre amplifier and at the transmitting side the necessary circuits for the production of a AM signal This board is used in the FT 101ZD MK1 MK2 and MK3 It is a optional board so it is not used in all transceivers FM Unit PB2219 This optional board is used for receiving and transmitting in FM mode The board uses the same connections as the AM board which must be removed if installed when installing the FM board One board can be installed at a time so you must make a choice Installing is rather easy
16. XT TX EXT RX VFO CH1 07 72 L 58 Y This manual was downloaded from Fox Tango International http www foxtango org GL A O eL E ara mt e A Ad ole E dl ele dele gt a 7 eee 5 94 AF Unit PB1964 The AF unit board contains the SSB CW diode ring demodulator and the carrier oscillator USB CW rx 8989 khz LSB 8986 khz CW tx 8988 3 Khz The audio signal is amplified and delivered to the internal or external speaker On the AF board is also the marker generator who provides a 25 khz marker signal for alignment and testing purposes The tx microphone amplifier with sideband generator and a 800 hz sidetone generator for CW are also a part of the AF unit The AF unit board is used in every model EXT TX EXT RX VFO CH1 CH2 lt lt os VFO Unit WII PB1440B 3420 OS EE ee ae Dw The VFO uses a modified Collpitts type oscillator to generate a 5 5 5 Mhz VFO signal A producing a 500 khz tuning range The VFO tuning is extremely liniair over the entire range no small feat with the use of a normal tuning condenser Stability is very good and tuning is very exact with the smooth precision gear The VFO is one of the reasons for the good overall stability of the transceiver The VFO frequency can varied by a small amount providing a offset of 2 5 Khz by a varicap diode and a controlling voltage Clarifier very useful when you are in a net if all members are not exactly at the s
17. able options or accessoires and are often negotiable Take your time and keep an eye at ads sometimes you have to act fast if your dreamset is at an auction for the right price If you are in a hurry you can always place a ad in the asked catagory 6146 type power tubes Try to buy NOS tubes of American brands I have a special liking for RCA tubes but other good brands are GE Eimac Tungsram Raytheon or European Philips Mullard Siemens or Telefunken All this firms don t make tubes anymore but there are still much tubes on the market Good tubes last practically forever if you use them properly special the ruggidized types and SQ types in Europe They are in most respects much better than the Chinese and Russian and many other mysterious brands that are on the market today A special warning may be worth the brands Haltron and Ultron They were tube manufacturers in the previous East European countries and produced low cost versions of all kind of popular tubes They still produced tubes when the other brands closed their factories If you look close to the construction you see skewed electrodes balloons skewed in the sockets and a general miss of quality They never last as long as the others I prefer anytime a 50 tested secondhand RCA tube to a new Haltron This manual was downloaded from Fox Tango International http www foxtango org
18. aded from Fox Tango International 14 http www foxtango org FT 901DM accessoires on the FT 101ZD The FT 101ZD can use accessories of the FT 901DM but there are some restrictions at their use FV 901DM external VFO This is a external VFO that provide a synthesized control system for your FT 101ZD It has a 3 speed scanner which will take you instantly everywhere in the band and the auto scan feature sweeps the band until it finds a signal The synthesizer has a steprate of 100 hz and is coupled to a 40 memory bank for storing the frequency Fine tune is done with the TX RX clarifier Because there is no frequency display on the FV 901DM use of this VFO in combination with the analog FT 101Z is not possible as the operating frequency cannot determined FTV 901R transverter The FTV 901R is a 3 band VHF UHF transverter all in one compact case The basic FTV 901R comes equipped for 144 148 Mhz 6 meter and 70 centimeter modules may be added The satellite 1 3 bands provide operation on OSCAR modes A B J on full duplex when a external receiver is used Repeater split is provided on 6 and 2 meters YO 901 Multicscope The YO 901 Multiscope provides superb monitoring capability with a instant interface to the FT 101ZD and can be used to monitor the output signal with trapezoidal and two tone tests general oscilloscope measurements are also possible A panoramic adapter is a available option for a quick band activity examination
19. age Another tube is the 6146W a military designation used as a remplace for 6146 6146A and 6146B in the forces This tube has a rugged construction similar to the 6146B but the saying goes that the input power on this tube should also be reduced to ca 75 of the nominal output of the 6146B 6146 and 6146A may be mixed but never mix a 6146 A with a 6146B because you are in for very strange effects and some fireworks There are other tube designations they are put together in a small table at one of the next pages This manual was downloaded from Fox Tango International http www foxtango org 13 Accessorles Cooler Fan The optional cooling fan can easely installed on the FT 101ZD If you use another fan than the original Yaesu fan see to it that the voltage is 110 Volt ac DC DC Converter The DC DC converter allows the mobile use of the FT 101ZD on a 13 8 Vdc source The unit is installed on the back of the transceiver and uses the internal transformer to obtain the proper voltages The power connection is made by a special DC cord delivered together with the DC DC converter FV 101Z external VFO This is a compact remote VFO for the FT 101ZD The VFO has a analog frequency display If you use it with a FT 101ZD the frequency is displayed on the digital display from the FT 101ZD The VFO has a precision tuning mechanism with a silky smooth operation Clarifier for transmit receive or transceive frequency is included The
20. ame frequency Can be used in TX and Rx mode or both This VFO unit is used in all the FT 101ZD series transceivers Premix Local Unit PB1965 90N This plug in board has 10 crystal oscillators who are selected by diode switches they generate the premix local signal for each of the amateur bands WWV It is possible to add another band on the board by adding the neccessary components and rewire the bandswitch The local signal is delivered to the Premix Unit zE d Ol Gig 74 5 ato This manual was downloaded from Fox Tango International 40 http www foxtango org The MSM 9520RS was produced solely for Yaesu and was never on the market There is a kit available with a PIC processor wich substitutes all functions See the page 19 or the site This manual was downloaded from Fox Tango International http www foxtango org PB2153 This is the newer plug in board used in FT 101ZD MK2 and MK3 that has all amateur bands including the WARC bands 30m 17m and 12m This board has no WWV or a optional AUX band Premix Unit PB1962 PB2152 The premix unit mixes the signal from the Premix Local Unit with the VFO or crystal controlled signal in a double balanced mixer The premix signal is passed trough a bandpass filter and delivered to the RF Unit The older board PB1962 has 7 filters the newer WARC board PB2152 has 9 filters for coverage of all amateur bands including the WARC bands in the F
21. and MK3 they have also positions for the WARC bands resulting in a more cluttered arrangement All three models have a clarifier wich allows tuning of 5 khz around the original frequency just enough for split frequency DX work or for round table QSOS if one of the members is not spot on the frequency The clarifier can be used in receive or transmit mode or both In the MK3 model here on the right there is also a Squelch knob for use with the optional FM board LOADING LOADING W TYPEXF 8 9HC In the FT 101ZD a CW filter is an option and can easely be installed C F 8988 3 KHZ on the IF board The normal filter has a bandwith of 600 hz Later NO D ASRA there was also a filter of 300hz but using this filter there is a YAESU MUSEN CO LTD serious loss of signal both on receive and transmit because the smaller bandwith The FT 101Z was the budget version of the FT 101ZD with a nice and surprisingly exact mechanical dial instead of a digital dial but otherwise both models are the same in every way The FT 101Z was delivered in all the versions from MKO to MK3 The digital counter module was an option and update is easy if you can find one because all wiring is available in every transceiver Just plug it in For all models with a serial number under 159999 you need the early type counter module with TTL IC s above 16000 the newer counter with LSI chip f This manual was downloaded from Fox Tango International ht
22. cure Source PA PGA LS y The transmitter stops working The band change switch is in two parts It is joined where it goes to the 6146B compartiment from a steel shaft to a fiber shaft This connection comes loose and the bands do not line up properly It is a good precaution to mark the shafts with a markerpen and tighten the screws on the band switch extension I heard from a FT 101ZD repairer spending days to track this one down Source ZL3MH FTV 250 and FTV 650B on the FT 101ZD The FT 101ZD is designed for the FTV 901 series of transverter via the 11 pin accessory socket The Plate screen and bias voltages are not always wired to the accessory socket This is needed if you want to run the FTV 650B 6 meter transverter that is designed for the earlier FT 101 series Especially the MK3 model did not have the above wiring Both the FTV 250 and FTV 650B can be used with this mod on all FT 101ZD s Source ZL3MH Help notes on the FT101Z FT101ZD Collected tips from everywhere sources unknown there are several versions of the FT 101ZD and some of these faults do not apply to all versions Blowing mains input fuse Disconnect PA anode clips to see if one of the PA valves is short circuited If not then some of the diodes in the main bridge rectifier are probably short circuited Intermittent blowing of mains input fuse If the fuse blows every now and again then suspect that one of the PA valves is flashing over onc
23. e in a while Fluctuations in power output Check the PA valves Check the PA anode choke Sizzling arcing from PA Check the PA anode choke Low power output on some bands Check the PA anode choke and also the coupling capacitor from the PA to the output tank circuitry PA unstable on higher frequency bands If the neutralisation is OK then check if the 12BY7A driver is glowing blue on transmit replace if it is This manual was downloaded from Fox Tango International http www foxtango org Low sensitivity rx If the marker can be received at the normal level then suspect the aerial fuse If the marker signal is low as well then suspect the PA driver 12BY7A this shares a signal frequency tuned circuit with the RF stage Q8 on the IF board also causes this problem sometimes PA tuning incorrect If the PA won t tune correctly on some of the bands then check for short circuits on the output tank coil and the nearby wiring No rx Check the width control is not set at one end surprisingly common No tx and no bias Check accessory plug is in octal socket at back Check the PA screen grid voltage if it is missing check D1002 D1012 and R1006 on Rect B unit No CW tx Check Q1003 on Rect B unit possibly Q1001 and Q1002 as well I have had failure of the CW carrier osc xtal on a couple of occasions No tx 28 30mhz only Check R8 which is mounted on the band switch assembly near the driver RF feedback on
24. ealigned If on all bands suspect Q04 or Q05 in the counter later models note that Q04 must be the S version Intermittent rolling frequency panel lights dim Suspect a dry joint on the LT smoothing cap Also suspect the cap itself Lumpy VFO This is caused by wear of the VFO tuning mechanism I have tried a number of times to repair and lubricate this but always without success although it may last a short while To be continued This manual was downloaded from Fox Tango International 22 http www foxtango org Buyers Beware Be careful by buying any FT 101ZD transceiver with AM FM and previously used on 27 Mhz by good buddy s they have all been heavely overloaded by users that had no real knowledge what they are doiing so suspect the worst They liked special the tube type final sets because they are not so easely distroyed by misuse as the more modern sets with transistor PA s When you buy such a transceiver it will cost at least a couple of final tubes at a additional cost of around 100 if not the total repair of the Power Amplifier It is better to pay something more for a good looking not over used set from a known source The same goes for the FT 901DM even more popular with the CB folks because they had the AM and FM boards installed If the price is too good to be true it usually is Cheap sets are usually problem sets If you can repair everything yourself and have the time there i
25. eds it to the PA The driver uses a tube 12BY7A for delivering the neccessary power and the tube is also used in the automatic level control circuit ALC Part of the output is available at a connector at the back for use with transverters or other purposes Tuning is done with the same inductive tuning unit that is used by the RF board The inductive tuning allows a constant output over a greater range The heater of the tube is switched by the heater switch on the front By using this Switch during longer receiving only periods the tube will last much longer and there is less heating up Warming up time for the tubes is 60 seconds gt AT cal The trimmer boards MK0 1 2 The inductive tuning unit This manual was downloaded from Fox Tango International 12 http www foxtango org The Power Amplifier PB 1715A The Power Amplifier consists of two 6146B heavy duty transmitting tubes the input filter and the output filter The output filter delivers the RF signal to a suitable antenna The impedance from the antenna has to be between 50 and 75 ohms unbalanced A Antenna with a different impedance at the feedpoint can be used but there must be a matching device between the transceiver and this feedpoint The same goes for other antennas with a lower impedance such as magnetic loops and others The 6146B PA tubes are very rugged and can deliver around 100 120 Watts output depending on the band of operation by a
26. ersion can be distinguished with its brightness control knob DIM located on the left side of the frequency display Also the DISPLAY COUNTER UNIT is marked as PB 2086A with MSM9520RS 40 pin DIP IC Contents of the KIT This module is offered as a parts kit form It contains a custom made double sided printed circuit board for converting the 28 pin of the PIC microcontroller to 40 pins of MSM9520RS programmed PIC 16F873 20 000 MHz crystal for frequency measurement standard as well as PIC clock generation and resistors capacitors and a transistor for modifying the preamplifier circuit on the DISPLAY COUNTER UNIT PB 2086A The Assembly and Installation Manual is available for down load Please contact Teruhiko Hayashi JA2SVZ by e mail thayashi ta2 so net ne jp for ordering information S H cost estimation and for other technical information Prerequisite It is necessary to unsolder 40 pin DIP IC MSM9520RS from the board this may be a little challenging if you are not familiar to You need to deal with fine foil patterns on the conversion printed circuit board routing between 1 10 of inch DIP IC pins Usually it takes a couple of hours for someone who often conducts transistor IC projects as a hobbyist to complete the assembly installation and adjustments This manual was downloaded from Fox Tango International http www foxtango org Hints and Kinks by PADPGA In this section I will give facts and thoughts that I ha
27. hat the military ruggedized version was designated the 6146W I will get to these tubes a bit later However RCA also introduced in the early 1960s the 8298 tube for use in commercial mobile equipment The 8298 is just a heftier 6146A Motorola General Electric and quite a number of other commercial FM equipment manufacturers used these tubes in all sorts of FM communications equipment for both low band 30 50 MHz and high band 150 8 172 MHz When the 6146B was introduced RCA announced the 8298A commercial equivalent of the 6146B In fact most of the RCA 6146B tubes were cross branded with the 8298A number in addition to the 6146B Those companies who were manufacturing 6146 series tubes for the military changed from the plain 6146 to the 6146A to the 6146B as the military decreed However all of the tubes manufactured under military contracts were known as 6146W and to my knowledge nothing was done towards marking the tubes as being equivalents of the 6146 6146A or 6146B The only way of telling is from the date code which is printed on each tube Different manufacturers changed tube types at different times Also I know of no master list telling on what date a particular manufacturer changed from the 6146 to the 6146A to the 6146B The only sure way to know if a particular 6146W is of either the 6146 or 6146A type is to look for a code date of before 1964 since RCA introduced the 6146B i
28. input of 180W in the SSB and CW mode In AM mode the maximum input power is 45 Watt This is due the fact that the SSB signal has just one sideband which has only 25 of the power factor of a AM signal so the tubes can deliver in SSB 4x the power of a AM signal at the same dissipation It is never a good idea to push the PA to the limit it is much better to run the PA with powers around 150W input in SSB CW the tubes will last much longer and the difference at the receiving station is minimal You will be surprised how many DX stations can be worked with low power It all depends on an effective antenna band conditions and operating skill and not only big power you have to double your power output to make a S point difference at the receiving station 6146 series tubes There are several different types of 6146 tubes and now tubes are getting scarce is it good to know what possibilities there are for replacing the tubes with others The FT 101ZD uses the 6146B type which has the biggest dissipation thus the biggest output but has a bad reputation for VHF oscillation and TVI as result They must be very good neutralized otherwise the PA destroys itself The basic 6146 and 6146A same tube with a sturdier heater is still around in great numbers an can be used if there are no 6146B s available The only drawback is the lower power capacity the anode dissipation is 25 lower and they need a new neutralization and a correction of the bias volt
29. is a easy way to see at a glance the difference between the various models the only thing you need to know is the serial number of the set The Yaesu serial number on the back of the set consists of a number a letter and 6 numbers The first number is the year of production 9 1979 0 1980 1 1981 a s o The letter is the production month C janD febE march a s o The next 2 numbers are the production run from 01 first series to 24 and higher last series The next 4 numbers are the serial numbers from 0001 to 9999 Identification of the model is easy by the use of the production run FT 101Z ZD MKO Production run 01 07 all in 1979 160 10m SSB CW only WWV rx only aux FT 101Z ZD MK1 Production run 08 16 NA i K EY NG 160 10m SSB CW AM WWV rx only aux Me ae A S Only Run 16 has the new type counter oy p erme CE 03061 FT 101Z ZD MK2 Production run 17 23 me VAESUMUSENCO LTO 160 10m WARC SSB CW AM is MADE IN JAPAN AS VIA Ue heal L te RAL OA A ci Te OE T TA DEAE TAS Moats e OA AEREA Z AAN FT 101Z ZD MK3 Production run 24 30 up 160 10m WARC SSB CW AM or FM The last serie is also easely identified by the grey and silver knobs on the front This manual was downloaded from Fox Tango International http www foxtango org The MKO model has SSB and CW The MK1 model has SSB CW and The MK2 model has SSB CW and only and covers the bands AM and covers the bands AM and covers the bands 160 80 40 2
30. l think the American industry at the time missed a chance here Only Heathkit had a representative over here and was very popular at the time for their nice kits Yaesu had a small sales network in Europe and the Swiss firm Sommerkamp imported the same sets with other typenumbers and under the name Sommerkamp they were a big success in Italy and Germany This manual was downloaded from Fox Tango International http www foxtango org FT 101 D MK3 HIGH PERFORMANCE HF TRANSCEIVER 4 VOX Gaim TETTI K bd L BA a gt 3 Bk a G Ba arena vox z E COMP L o A RO 7 lt n L a KK E SD E HF SSB TRANSCEIVER E y e 5 pp E LABU ie AF GAIN 3 RF GAIN ee j lt 2 aS 40 iar ae a AAA S X POWER HEATER PROC ATT TO ACCS PO L k R lt 1 Z 2 F se y b gt 1 A d Sp Z 2 2 f 8 ur um ex Dn C Ar H d _ gt K A gt wa o CAC MR nx o 10 arnon wom E enS sa l X gt v The FT 101Z ZD In 1979 Yaesu announced a new version of the FT 101 called the FT 101Z analog dial and ZD with digital dial The FT 101ZD looked very much like the FT 901 but had a simpler internal construction with just a couple of plug in boards for HF premixer and oscillator The IF and the audio board were connected with plugs from a wire harnass the power supply boards are soldered direct to the wire harnass thus not the overall modular construction that made the older FT 101
31. n the middle of that year However some manufacturers did not start manufacturing 6146B equivalent 6146W tubes for at least a year after RCA introduced the 6146B RCA claimed that the 6146B was directly interchangeable with the earlier members of the 6146 family Unfortunately this did not hold true in most cases Collins Heath and probably other companies at first issued various documents saying that the use of the 6146B in their equipment was fine But this soon proved otherwise For example when the 6146B was used in the Collins 32S 1 32S 2 32S 3 32S 3A KWM 2 and KWM 2A it was discovered that the components in the neutralization circuitry burned up in a very short amount of time Thus Collins had to retract the statement that it was OK to use the 6146B Then due to the fact that the United States military establishment wanted to standardize on the 6146W equivalent of the 6146B the neutralization components had to be redesigned to allow the 6146B to be used Fortunately these changes did not affect the use of the earlier 6146 and 6146A in those transmitters manufactured to use the 6146B All three types of tubes may be used without any problem in these transmitters Replacing the 6146 6146A tubes with 6146B types often results in spurious emissions parasitic oscillations etc This is due to the fact that there are different bias requirements different inter electrode capacitances etc of the 6146B versus
32. o parallel and substitute the 6883 6883A 8032 tubes The 12 volt equivalent tubes are often available for pennies because of the vast number that were used in the commercial FM market I have done this with my Heath SB 110A and it works like a champ If you every want to change back it is a very simple operation to do so I know that there are amateurs who say that they have used the 6146B tubes in place of the 6146 6146A without any problems I can definitely believe that But I have seen way too many examples of the 6146B causing problems in relation to the cases in which the substitution has no effect As I said before neutralize and keep checking the neutralization for several days if you do replace your 6146 6146A tubes with 6146B types Otherwise you can find yourself with TVI burned out tubes and other damage to your transmitter You must be VERY careful when dealing with the various tubes of the 6146 family otherwise you just might be in for some very interesting problems Substitute if you must but be aware that you are treading on thin ice This manual was downloaded from Fox Tango International 18 http www foxtango org Removing the Yaesu WARC bands TX disabling modification on FT101 ZD MKII N B The Yaesu Mod did not disable the RX for the WARC bands The Driver mod works by effectively adding extra capacitance from the lower bands across the coil so that the WARC bands cannot tune to
33. of MSM9520RS in the DISPLAY COUNTER UNIT PB 2086A equipped in FT gt Ta 101Z FT 107 FT 707 and FT 901 902 This module restores their frequency display functionality when MSM9520RS fails Those YAESU models were designed and produced at the supreme of analogue technologies and can still perform beautifully when properly maintained and with frequency display of course My FT 101Z came from one of my friends several years ago and like many others the frequency display was nonfunctional MSM9520RS was dead Since the entire transceiver except its frequency display was functional and in good shape I decided to develop this PIC replacement module for myself It did not take too long for me to realize that many people in the world are desperately looking for MSM9520RS and I started thinking I can be of their help Applicable Models Originally this module was designed for and tested in my YAESU FT 101Z but thanks to other enthusiastic volunteers the applicability of this module to other YAESU models has been verified and tested So far the following YAESU models can make use of this replacement module The new replacement is PIC 16F873 which has been preprogrammed by Teruhiko Hayashi JA2SVZ ae YAESU 20 E E 1 FT 101Z FT 107 FT 707 FT 901 902 later version only For FT 901 902 the early versions did not use MSM9520RS for its frequency display therefore the early version is not applicable The later v
34. oints were OK However when I pulled the PA tubes I saw to my surprise that they had put in a 6146A along a 6146B tube one of the most serious mistakes you can make with this tubes You have to have 2x 6146 A or 2x 6146B and preferabely a matched pair for optimal use The input relay was changed in a very crude way glued to the chassis with a blob of silicone and the output lowpass filter was removed I have all wiring redone with 0 8mm silvered wire isolated with the Original oil tubing repaired the coil connections rewired the neutalizing parts and the output power meter A new coil for the output lowpass filter was made from 1 2mm silvered wire and I put in a new antenna relay with 16A silver contacts I think the PA looks a lot better now I have used a couple of 6146A tubes in this set because they are at hand and to test the possibility for using that kind of tubes in this PA They work fine The power output is not important for me 100 Watts does everything I need and the output tubes will last forever In my first FT 101ZD I have still the original General Electric 6146B final tubes and they look and work as new Wim PADPGA 6146 type tubes and equivalents 6146 25W 6293 heavy duty pulse tube 5 10x longer lasting 6146A 25W 8298 6883A 8032 12V heater 6146B 35W 8298A 6883B 8032A 12V heater YL1370 YL1372 12V heater 6146W 35W 6146W fabricated as 6146B after 1962 QE 06 40 25W 6146A European version by Phili
35. ps amp Mullard QE 06 40F 12V heater K 13 8 V heater H 26V heater The 6146 Family of Tubes by Glen E Zook K9STH Probably the most used tube of all times in the final amplifier of boat anchor transmitters is the 6146 From the early 1950s until at least the 1980s the 6146 found its way into virtually every manufacturers line of transmitters In fact during the early 1960s RCA had a series of advertisements on the back cover of QST that listed a different manufacturer s equipment that used the 6146 each month There are actually three distinctive variants of the basic 6146 The 6146 6146A and 6146B It is unfortunate that the 6146B was called the 6146B for it is really a different tube from the first two Primarily the difference between the plain 6146 and the 6146A is the makeup of the heater filament The 6146A has what RCA calls the dark heater This dark heater is supposed to be more resilient to vibration work well at a larger range of voltage etc Otherwise the 6146 and the 6146A are the same tube In mid 1964 RCA introduced the 6146B with the claim of 33 33 percent higher power input than the 6146 6146A Also it was claimed that the 6146B could be directly substituted for the earlier tubes The 6146 6146A had a maximum rated power input of 90 watts for CW and SSB operation and the 6146B had a rating of 120 watts for the same emissions Many amateurs are aware t
36. put of 8 9875Mhz goes to the IF board The in and output tuning of the RF amplifier is done by permeability tuned circuits resulting in high sensitivity and excellent rejection of unwanted out of band signals The difference between the two boards is the mixer The PB1960A uses a balanced mixer with 2 Fet s the later PB2154A board uses a diode ring mixer for a better big signal behavior U ZA a B 3a E Ay PA aN Y Wa f g A lt E 7 A WA ON gt EN 1 19 1 1 a 1b eE p T PB 9060A RF board solder side an 3 9 p 9 L LOS gt ya apy Po a o E K wo _ oad N L AA AS man i i WA PB 2154A RF board component side This manual was downloaded from Fox Tango International 8 http www foxtango org E oN THAOSL O 742 SDOT 4X3dA1 A a LE Y TYPEXF B 9HC E 6988 3 KHz RRR NO BL YAESU MUSEN COLLTD y TYPE XF 8 9HS CF 89875 KHz NO o EE B YAESU MU 2 01103 NaSNW EE PRE ON ZHN SL868 Ya GHG 8 4AxX 341 ee mmm Tor rrrrrTrrcor s IF board PB1963B C The IF board is the heart of the transceiver and is the same in every type of FT 101ZD The signal is first passed trough a monolithic filter with a bandwith of 10 khz to have a wide band point for noise blanking The signal pass then the noise blanker gate and is fed trough the SSB filter or the optional CW filter to the IF first mixer Here the incoming signal is heterodyned wi
37. s envelope of the tubes was being shattered This was reported to Motorola At first they refused to believe us saying that we must have gotten a bad shipment of tubes But within a couple of weeks they received over 1000 complaints from their service stations about exactly the same problem It cost Motorola one heck of a lot of money to pay the warranty claims because they had tried to cut costs by eliminating the earlier type of tube They had to re box all of the 8552 tubes that had been put into 8032 boxes and get in a rush shipment of 8032 tubes The whole problem stemmed from the fact that the B series of tubes is not the same as the plain and A series The parasitic oscillations were caused by the different bias requirements and by the fixed neutralization of the driver and or amplifier tube in the Motrac There was no practical way to change the circuitry to handle the B series tubes Also making such a change would void the type acceptance of the units In a practical sense it is OK to mix 6146 and 6146A tubes since the primary difference is in the design of the heaters But NEVER mix 6146 6146A tubes with a 6146B This is really asking for trouble Also in a number of transmitters and transceivers especially the Heath SB Line the heaters filaments of the pair of 6146 tubes are in series In these units it is very easy to change the heaters from series t
38. s nothing wrong with buying cheap but usually the sets are otherwise misused too so you always end up with a lesser set than the one in good condition carefully used by a fellow ham Of course this sets can also have some problems but have at least the potential to be restored to a first class piece of equipment Use your common sense Always try to collect the set yourself that way you can see what you are in for Sometimes to meet the vendor can give you a clue how the set was used Buying at Internet is a good source if you take some precautions If the seller uses the internet much he has usually a quality marking to his name wich gives a clue to his reliability but this means also that he buys and sells very often and is more interested in a quick buck than in the equipment itself So please beware and be careful You see often the same pictures of very nice equipment in ads but when you receive it is it a box full of junk scratched and mostly with a lot of internal problems See the FT 901DM page for a sample The best buys come from local hams or hams who want to upgrade to a newer ricebox with more me nu s and knobs to fiddle with To obtain the new toy they sell the old reliable sets often for a modest price Another source can be the usual swapfest or estate sell fom a deceased Ham Of course you have to inform yourself on the market value of the set you are looking for Actual prices change with general condition the avail
39. th a 19 7475 Mhz local signal This local signal is delivered from a XCO and the resulting mixing frequency is 10 76 Mhz This 10 76 Mhz signal is fed trough a second SSB filter and mixes with the same 19 7475 Mhz local signal back to the original IF frequency of 8 9875 Mhz The 19 7475 Mhz XCO is tuned with a varicap over a close range and the result is that the passband of the first and second filter shifts along each other so in effect making the passband smaller or broader depending of the frequency of the XCO It is a very useful item you can make the band pass as low as 300 hz and as high as the original passband of the first filter SSB 2 4 khz CW 300 or 600 hz The skirt of the filters add so the filter passband improves too The output from the second IF mixer is fed to a 2 stage IF amplifier and is delivered to the AF unit On the board are also a AGC amplifier and S meter amplifier the SSB tx IF filtering and the speech processor with filter The board has the SSB filter installed and there is room for installing a 300 or 600 hz CW filter NB Fix unit PBi961 This board is also used in every FT 101ZD and contains the noise blanker circuitry and a x tal oscillator for 2 fixed frequencies The fixed frequencies are sideband dependent so the operating frequency is on LSB 3 khz higher than on USB at a given x tal frequency The necessary x tals have to be in the VFO 5 5 5 Mhz range 2393 a 9 3350 ag y co o os E
40. the other two It is often difficult to neutralize 6146B tubes when used in place of the 6146 6146A If neutralization can be achieved often it lasts for just a few minutes before the tube s goes into oscillation If one insists on trying the 6146B tubes in place of the 6146 6146A types the very first thing to do is to neutralize the final amplifier If it will not neutralize then the 6146B tubes should immediately be replaced with the older type tubes If it does neutralize then the neutralization should be watched for several hours even days of operation If the neutralization changes then the 6146B tubes again should be replaced with the 6146 6146A series If the neutralization remains constant after several days then use of the 6146B is fine in that particular transmitter This manual was downloaded from Fox Tango International http www foxtango org E A E J AE e I have in my shack a number of transmitters that use the 6146 6146A type of tubes These include Collins 32S 1 32S 3 earlier model before the neutralization was changed Heath Apache DX 100 DX 35 SB 401 SB 110 Seneca Johnson Pacemaker and other transmitters as well Every one of these is much happier with the 6146 6146A family of tubes In addition I have owned transmitters like the Knight T 150 and T 150A that use the 6146 tubes Frankly these transmitters were much happier with the 6146 6146A tubes There is another 6146 family tube
41. the required frequency and no drive 1s therefore produced for the PA This Mod removes the extra capacitance and the WARC bands can then tune correctly There are no adjustments to make after the wiring change Takes about 15 minutes and you get three bands Going PREPARATION a Turn the FT101ZD over with the front panel towards you The Driver section is on your Left hand side half way up a Remove the Driver section metal plate Two of the lid securing screws will be hidden under some foam c The SLE wafer is next to the PA section which is at the Left hand side rear The S1D wafer is in front of this one towards the front on the unit 41401000 000909009 HIAKAI o 0606000000 0600000 Y00600009 9500000 S1E wafer S1D wafer d Identify the 3 BLUE wires and a GREY wire all joined together on a spare hole at the top of the S1E wafer The Blue wires are connected to the S1D wafer S1E wafer S1D wafer 3 BLUE Wires a GREY Wire The MODIFICATION 1 Cut all the wires off the communing point on switch wafer S1E 3 blue 1 Grey wire ue 1333535535355 A Cut all the wires position 40 metre 17 metre 12 metre 30 metre 2 Remove completely the grey wire to switch wafer S1D position 12 metre best done by using long nosed pliers and twisting it off 3 Remove completely blue wire off switch wafer S1D position 40 metre gt y 30 metre 17 nietre 4 Connect as a loop Bl
42. tp www foxtango org The various models and the used boards FT 101ZD MKO FT 101ZD MK1 FT 101ZD MK2 FT 101ZD MK3 Sn 01 07xxxx 08 16xxxx 17 23xxxx 24 UPpxxxx RF board PB1960A PB1960A PB2154 PB2154 NB Fix PB1961B PB1961B PB1961B PB1961B Premix PB1962A PB1962A PB2152 PB2152 IF PB1963B PB1963C PB1963C PB1963C AF PB1964A PB1964A PB1964A PB1964A Premix LO PB1965 PB1965 PB2153 PB2153 Sel switch PB1966C PB1966C PB1966C PB1966C VFO PB1440B 3420 PB1440B 3420 PB1440B 3420 PB1440B 3420 Rect A PB1967 PB1967 PB1967 PB1967 Rect B PB1968A PB1968A PB1968A PB1968A Capacitor PB1969A PB1969A PB1969A PB1969A Trimmer A PB1970 PB1970 PB1970 PB2193B Trimmer B PB1970 PB1970 PB1970 PB2192B Trimmer C PB1092 PB1092 PB1092 PB1092 Bandwidth PB1972 PB1972 PB1972 z APF PB2217 Driver PB1714A PB1714A PB1714A PB1714A Final PB1715A PB1715A PB1715A PB1715A Clarifier PB1973A PB1973A PB1973A PB1973A LED PB1974A PB1974A PB1974A PB1974A Lever switch PB1975A PB1975A PB1975A PB1975A Display PB1978 PB1978 PB2098A PB2098A Decoder PB1979 PB1979 Counter PB1980 PB1980 PB2086A PB2086A AM PB2040 PB2040 PB2040 EMK PB2218 RS C5 only production numbers starting 16xxxx had the PB2086A counter optional the AM board or the FM board can be installed MK3 only The used boards in detail RF boards PB1960A and PB2154A Contains the RF pre amplifier the receiver and transmitter mixer and a buffer stage The mixer out
43. ue wire on switch water S1D position 30 metre to switch wafer S1D position 20 metre 5 Connect as a loop Blue wire on switch wafer S1D position 17 metre to switch wafer S1D position 15 metre ww W W W W W Y WV 333399 17 metre connected to 15 metre as a loop 30 metre connected to 20 metre as a loop 6 End of modification KRAAK co 0 0000 bo o 00 09 XAKKAXYY 89 C 6 foam tape Driver section metal plate placed Mario Chomicz G8ODE Teruhiko Hayashi JA2SVZ Counter Replacement Module Text and explanations by Teruhiko Hayashi JA2SVZ http homepage3 nifty com RadioGaGa COUNTER_e For YAESU FT 101Z FT 107 Sommerkamp FT 307 FT 707 FT 901 902 later version DISPLAY COUNTER UNIT PB 2086A Custom Integrated Circuit MSM9520RS Replacement Module Is your precious beloved 1017ZD still displaying the frequency Pre DSP MPU era transceivers from YAESU often made use of a custom integrated circuit IC MSM9520RS in their DISPLAY COUNTER UNIT The bad news is that MSM9520RS is somewhat prone to failures Since this particular IC was not a standard product but a custom ordered IC by YAESU and its production has been discontinued for long time there is very little hope to obtain a replacement part for repair even at world famous TOKYO AKIHABARA This replacement module takes advantages of the flexibilities of PIC microcontroller PIC 16F873 to simulate the exact functionalities
44. ve collected from all over the net When sources are known I will mention them because to hold your FT 101ZD in an excellent condition is only possible when all real amateurs share their knowledge and experiences That s still the first rule for a Ham in my opinion Of course are all tips free to use but using them is always at your own risk If you don t have the knowledge or technical skill then please let the lids of your set closed it is always better to have a good working transceiver then a perfect heap of junk Never try to be smarter than the HF engineers of the design Lab there is almost always a good reason that things are done the way it is Most modifications are small and are additions for a specific reason not a complete rebuild of the set So have said that we start with a collection of tips First of all Get the proper user and service manuals for the equipment that you have and make yourself familiar with the working of the circuits The manuals for the FT 101Z and ZD and other Yaesu communication equipment are on the FoxTango site in PDF format free to download well a small donation is very much appreciated to keep things rolling so there is no reason to start without them Special recommended is the very extensive Maintenance Service Manual with around 200 pages which is not only very interesting but gives all information on boards voltages trouble shooting lists and in general all information to keep your
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