Yaesu FT-101ZD Survival Guide
Contents
1. 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 is 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 b2. 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 A a 9 3503 d x 00 099 EXT TX EXT RX VFO CH1 03 P2 L d This manual was downloaded from Fox Tango International http www foxtango org S A i 3322750 CE ara t e va 370 2 295995 22T E E u 9 eee 5 a d 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 9 VFO Unit WI PB1440B 3420 ey gi RS ae Dw The VFO uses a modified Collpitts type oscillator to generate a 5 5 5 Mhz VFO signal am 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
3. Tango International Yaesu FT 101Z ZD series transceiver FT 101ZD NETT HIGH PERFORMANCE HF TRANSCEIVER FIIO FEE we Gal CHI i WL BIT LLE AF OAIN E AF GAIN S 9m Ly mee a a POWER HEATER Pi KTM MR R M L x ET x XM t LL Ld nib LLLI ze C imc Force nh d NET X i a Ld e 10 i ET L IM TU LZ 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 hig
4. 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 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 15 The r 16 CAMS A WP Ww TY WP UA d e U 1 A A L m s e i gt ebuilt PA with 6146A tubes This manual was downloaded from Fox Tango International http www foxtango org 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 d
5. 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 with 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 PB1961 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
6. 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 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 N O D 1 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
7. 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 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 11m 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 segme
8. 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 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 I 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 PAOPGA Improving second Double Balanced Mixer On the AF board is the double balanced mixer D02 to D05 they are 4x 184007 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 carr
9. 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 same 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 i e ocak h This plug in board has 10 crystal oscillators who are selected by diode switches they i 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 j This manual was downloaded from Fox Tango International 10 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 VJ S the site http homepage3 nifty com RadioGaGa 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 d
10. A 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 voltage 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 E TSE STE pug SSSA Poe al L ee lt This manual was downloaded from Fox Tango International http www foxtango org Accessories 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 co
11. E mns HF 558 TRANSCEIVER gt t EZY I I M AZIr Fi 1 AF GAIN AF OAIN POWER HEATER PROS ATI ROWS A PCR PO LI gt on o H wa he on ALG MAM Proms MOOt wom e CLARIFIER vee T cow zB L AT kad H 52 R 47 U REM P a LN t 7 wy nn E E i m r 19 N 100 9 won de 4 7 EU M L lt Y Yi 5 aun 4 TM E mu ee f Ox OFX EXTAAx wro cmt 09 m FT 101ZD HIGH PERFORMANCE HF TRANSCEIVER HF SSB TRANSCEIVER YAESU FT IQIZO POWER HEATER paoc ATT AGCS PO NBO rm RR A ud OFF M i you o AME d APF NOTCH WIDTH 0 0 0 010 0 EXT TX uL Yaesu FT 101ZD S ur vival Guide This manual was downloaded from Fox Tango International Pr LE GUTTE WPS OHTA DAT BRANDX Desired signal Deserted signal EXT TX EXT RX VFO CHI CH d b d i v 1 d L single fiter IF shilt systema move you from one ORM signal into another YAESU FT IOI ZD Desired signal Dosired siinal e E a a a T d p al i T Jm Fu 4 UT an L E Rae lak lke AE La m J b Tet P ai F c EDU Xx uet d mos Ker Paha ur r r Z E e M E SLT r P jum um mm ae xd au r Hp a V L pls E T am ut T 4r d atu y aet Lo ET dP ef oy Le 4 ei ur K po 1 L 3 a el T L k H B a udo ac L e p p j i 3 Variable bandwidth system eliminates ORM fram IF paszband This manual was downloaded from Fox
12. 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 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 Vdc 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 AP EANDEM ETH The APF unit is placed in the audio circuit by the APF Notch switch on the front panel s 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 frequenc
13. ching 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 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 6146
14. e 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 downloaded 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
15. e 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 joints 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 PAOPGA 6146 type tubes and equivalents 6146 25W 6293 heavy du
16. 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 only and covers the bands 160 80 40 20 15 and 10m JJY WWV UX The MK3 model has SSB CW and AM or FM and covers the bands 160 80 40 30 20 17 15 12 and 10m The MK1 model has SSB CW and AM and covers the bands 160 80 40 20 15 and 10m 10A s 10B 10C 10D JJY WWV 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 silver rings on the knobs AF SSB TRANSCEIVER YAESU FT 101Z20 PROC ATT 2096 S PO im Sil x fo F IC OFF CR Wee u C era Ta See 10dB OFF ALC MARK APF NOTCH 9 WIDTH The MK2 model has SSB CW and AM and covers the bands 160 80 40 30 20 17 15 12 and 10m All models have a width control for varying the passband of the IF filter s the MK3 has additional a audio APF Notch filter APF NOTCH 9 WIDTH ww gt U PRESELECT RF GAIN AP GAIN I PRESELECT AF GAIN 9 RF GAIN 4 6 4 ax E CLARIFIER 0 N Ey w t E aN a TT E 2 ETT 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
17. elivered 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 FT 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 S 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
18. epending 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 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 Th
19. h 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 still 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 101ZD MK3 HIGH PERFORMANCE HF TRANSCEIVER 4 VOX GAIN TETTI LI K M LI pa a REM Bx ad n pc e Rr vox z MOC GAIN ES n Med X L LI bd RSS aS lt n gari E SD HF SSB TRANSCEIVER 17 e p o Ab ew LABU ie AF GAIN S RF GAIN TT F E aS 40 iar O0 ee gt LJ L4 POWER HEATER PROC ATT TO ACCS PO LLI X R lt 1 x 2 F y b 1 L d mE Z m 2 s T RR DR Ai udi n E NI Jj M I K A gt wa o Ac R 3 nx o 10 arnon wom enS sat l N gt N U 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 premixe
20. h 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 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 921979 021980 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 Bueno A S Only Run 16 has the new type counter pm p erme CE 03061 FT 101Z ZD MK2 Production run 17 23 me YAESUMUSENCO _LTD 160 10m WARC SSB CW AM is MADE IN JAPAN 4 IK AS hes YA C Ud 1297 1877 RAL OA RR Te OE T TA PALO TAS Moats Une DS E Oi AAC KL Z PPA i FT 101Z ZD MK3 Production run 24 30 up 160 10m WARC SSB CW AM or FM The last serie is also
21. ier 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 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 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 I
22. ies 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 20 http www foxtango org
23. ions 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 once 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 18 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
24. ltough you need a heavy duty car battery current in voice peaks around 20 Amps HILL UL UA LG i IOO 444111111111111 ELERIA 73 HMMM d SULLA WHA We SSS Ss This manual was downloaded from Fox Tango International Specifications FT 101Z FT 101ZD Type Amateur HF 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 notc
25. mpact 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 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 Tt 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 th
26. nt 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 realigned Tf 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 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
27. r 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 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 a
28. rting 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 output 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 E RWS WW ex Le PB 9060A RF board solder side PB 2154A RF board component side This manual was downloaded from Fox Tango International 8 http www foxtango org u oN THAOSL O 742 SDOT 4X3dA1 A a LE Y TYPEXF B 9HC E 6988 3 KHz NGRUCNTN ND L YAESU MUSEN COLLTD y TYPE XF 8 9HS CF 89875 KHz NO ENEN EE B YAESU MU M 2 ac Ax a ha 2 0 n oss f O BL 9 Em 01103 NaSNW Nsava PRE ON ZHN SL868 43 GHG 8 4AxX 341 A p Tor w UE NE GE S Gm 4 G9 a m 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
29. t 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 T audio board and the cable connectors of the IF board there where 4 several pins with craters around See picture j This gives all kinds of curious problems Resoldering is the cure Source PAOPGA Ay Ea d 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 vers
30. ty 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 Philips amp Mullard QE 06 40F 12V heater K 13 8 V heater H 26V heater Hints and Kinks by PAOPGA In this section I will give facts and thoughts that I have 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
31. uys 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 available 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 factor
32. 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 This manual was downloaded from Fox Tango International http 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 Upxxxx 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 E 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 sta
33. y 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 feeds 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 wman mi 7 Y L The trimmer boards MK0 1 2 The inductive tuning unit This manual was downloaded from Fox Tango International 12 http www foxtango org pm 4 i binga pale An L L c p 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 mat
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