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When connecting an RF probe to the driver RF out RCA jack in the rear of the FT-101E, does anyone know what voltage should be present? I was wondering what signal level the finals are expecting to receive from the driver. And can monitoring this level be used to peak the xmit trimmers without the final heaters on or is power out from the finals the best way? Thanks, Richard kn7sfz

My title kinda says it all: Are there any shops that still work on/specialize in Yaesu FT-101E repair/restoration? I purchased a Yaesu FT-101E with a FL-2100 yesterday for $200. The radio appears to work on all bands. I do not know much at all about this world famous radio. And I am not even sure how to work the FL-2100. Are their any good instructional videos? Thank you, AJ6XW

Hi group, Do any of you have suggestions for (or have for sale) a relatively inexpensive HF autotuner I can use with my FT-101EX? Don't need any bells and whistles, just something that might work with my non-resonant dipole. Thanks for any input, Richard

Hello again group, While servicing the Phones jack on my FT-101EE, I noticed a loose wire in the same vicinity. I don't know if this wire has been loose or if it broke loose when removing the phone jack. It is a GREY/WHITE wire and one end of it is connected to the lower lug of the MOX-PTT-VOX switch. I am looking to where the other [loose] end connects to. Any help appreciated... Mike KD7VRG Tucson, AZ

Hello group, I have an FT-101EE (1976 vintage I believe) I have noticed the capacitor in the C103 position is a 1000uf 25v, whereas the schematic calls for a .047uf to be there. Schematic also shows this as being a non-electrolytic, whereas mine is. C-103 connects to the T12 transformer on the bottom of the chassis. So, question is...what is the proper cap there? Thanks! MIke KD7VRG Tucson, AZ

Hello all, I recently wanted to try my hand in getting an old rig. I bought an FT-101B on ebay, untested of course. It does receive pretty good on the bands but it will not transmit. The mic I have was tested on another Ft-101 and it works. I've taken it apart, pulled out all the boards, cleaned it as much as possible. I didn't see any burnt components. I took the relay out of the high voltage box where the tubes are and cleaned the contacts. I touched it with 12v and it engages. I checked the light bulb in the back and it reads good on an ohmmeter. The tubes look good. I cleaned the MOX adjust knob. My question is which board or part should I look at first. I'm kind of at a loss where to start. Thanks in advance all.

My 101zd was about 10db down on rx. I went down the troubleshooting road and cleaned all the relays I could find and checked the lamp fuse. Wound up changing the first rf amp and it came back to life. George NE2I

Are there any members who have made the conversion from 6JS6C finals to 6883Bs according to the K3JLS.net documents? If so, do you have any recommendations? I've done the conversion but have yet to get my rig back on line.

Hello. my first post for a long while so hoping somerone can help me. I have powered up this rig after many years in (dry!) storage. I was vey encouraged when in the "Tune" mode I obtained 120W out into a dummy load. Obtained 120W out on CW and about 50W am - all to specification. Then I tried SSB (LSB on 40 meters). In order to set up the correct microphone gain I have to switch to LSB mode with the meter set to ALC. On key up the meter should read about full scale - but it doesn't move off zero! So I can't get to the stasge of adjusting the mic. gain to get correct level of modulation. I have copies the user manual and the service manual. This exact fault is actually described in the service manual (page 4-8) with relevant circuits (pages 4-9 and 4-10). However I have found that these circuit diagrams are ambiguous and in one case completely incorrect. One solution suggests "grounding the anode of D2 which can restore SSB". Fine - but which D2? The "D2" shown for the "RF speech processor" (Board PB 1534) is clearly nothing to do with the SSB circuit although D3 on that board is connected to the ALC line. I wondered if the "D2" mentioned for shorting anode to ground is the D2 in the grid circuitry of V2? I didn't want to short this to ground without some advice! so That is my query! Many thanks for any thoughts/suggestions. Peter G0LQU

I'm assuming this radio has a garden variety changeover relay but wanted to check with those more experienced with the ZD. Assuming the relay is the stock relay, are there any tricks I should be aware of or anything I should be concerned about? Is it silver plated? I don't want to damage it so can I just attack it with a dollar bill and some deoxit? Anyone? Anyone?

Hi Dan. I found out why the the reason that the receive isn't working. A suggestion from Alex N7SM at the winter field day. To check the headphone jack. Sure enough I jumped the pines on the back of the headphone jack with an alger clip and I got full sound. But I don't reremember how to get the head phone jack out.

Hi All. Re: I reasnly got a partly working Yeasu FT-101-ES. I got it asis from a pawn shop. The Pawn shop got the 101 in an estate sale. The 101 came Complete expect for no A/C or DC power cord. I got an A/C power cord from eBay. The A/C cord arrived about a week ago. the 101 powers up BUT there is very little sound, just a tinny bit of static and when I turn on my FT-890 HF rig (It works great) to 3.980mhz and turned the antenna switch to the FT-101-ES and turned the mod on the 101 to tune and moved the ptt switch to MOX I got a very loud tone out of the transmit on the 101 and about 30 watts power reading on my MFJ-941E tuner with the 101 preselect, plate and load tuned right. I can hear my own voice on the FT-890 when I speak in the mic on the 101. All 3 tube filaments light up. So that tells me that the TX is working up to the driver tube and probably the finals are putting some power out. It also tells me that the 3 ganged tuned IF cans haven't been messed with (thank God for that). It has been many years since I last worked on any FT-101 anything. I am going to need some guidance on fixing this rig. All I have for test gear is an old Echo tube driven RF GEN and a Ideal 61-340 digital VOM. I sold my portable tube checker a few years back. BTW When I tried to TX on the FT-890 I heard NOTHING on the FT-101-ES Steve, kc7byp@... From the desk of the Amateur radio station of KC7BYP 1/24/2024

Hello to the Group. Any help would be greatly appreciated. I have a friend's 2 FT-101E's here and both had essentially the same operational problems, that is both worked well on all modes, Rx & Tx on AM and CW, but no SSB Tx. I did get the first one going by cleaning both Relay #1 and the Mode switch. The 2nd runs well both on Rx and TX on AM and CW, but also no SSB TX. Looking at the Tx signal on my Spectrum Analyser in SSB mode, I can see a minimal carrier (-110dBm or so) and whistling or talking into the mic the signal rises perhaps 10dB or so, but the audio I hear is AM not garbled (not SSB) and no power to speak of. I've gone through this rig pretty rigorously and found several minor problems, out of tolerance resistors, leaky caps, and Q6 on the PB-1534 which caused a No ALC issue but having replaced it with a similar FET I do now have ALC but still no SSB drive. Bias on the Finals and driver are good (60mA and 20mA), so I'm in at a loss and becoming frustrated. I also swapped out all of the boards and both relays from the working unit to this one and I have the same problem, so it's got to be something that I haven't swapped out, the PB-1534 or the mode switch? Anyone have any idea on what I'm missing here? Thanks for any assistance. 73 de Claude - VE2YI ceverton2222@...

Wish I could offer more than moral support, but I' m fighting the same issue with a 101B. Every time I correct one thing it uncovers something else. Bad rectifier board, dirty relays, mismatched PA tubes. Looks like this could be a long running project!