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I think pretty much any diode can be used as a varactor. Some are just better than others. 73 -Jim NU0C "A. John Hecht via groups.io" <k6koi@...> wrote:

Emerson, do those diodes function as vari-caps?

Thank you Jim for taking the time to respond to my posting. I agree that a DMM would not detect a very slight voltage variation in the DC, especially if the sampling rate of the DMM is too slow. And

I recently repaired a FT-707 that had, among other things, clarifier issues. I found that the JFET constant current source and the Zener diode in the clarifier power circuit to be bad. Not flakey,

John I guess you can replace the varicap by a 1N4001 -1n4007. Emerson PP6EW Em sáb., 22 de jun. de 2024 às 20:34, A. John Hecht via groups.io <k6koi= [email protected]> escreveu:

I recently was given two FT101ZD's, one a "Parts rig" Mark I and the other a Mark II. ?Both required work but both are now working. ?I found I had to remove the voltage to PIN 2 of the VFO input

http://www.amwindow.org/tech/htm/ft101.htm Em qui., 20 de jun. de 2024 às 22:15, James Fisher via groups.io <cadiscase= [email protected]> escreveu:

I have an FT 101 EE. The Audio Board is? PB-1315. I am replacing the electrolitic caps? and the Mylar caps. Is there any change in cap values I should make that would improve the audio on transmit

Only the older ZD models have the display unit with the toggle switches. I can’t remember when the switched over to the later model. [email protected]> wrote:

Unplug the two wire harnesses from the display unit and clean the male pins. Plug them back in a few times to make sure all of them or connecting well. Retest. If no good: As lame as it sounds, I’d

Thanks for that - is it any clue that this only happens when transmitting and the power is increased? I was suspecting a supply voltage issue perhaps with the additional drain on TX. 73 de Chuck,

Would that be the case for a 101ZD MkII? I've never seen any toggle switches on the VFO although they could be inside the housing. 73 de Chuck, WS1L chandlerusm@... ---------- Forwarded

James You can find instruction at https://www.qsl.net/nw2m/FT-101_SVC_Manual.pdf section 6-1. 73 Emerson PP6EW Em seg., 17 de jun. de 2024 às 15:43, James Fisher via groups.io

Also, since it happens on 10m, 12m and 15m, I would suspect an issue with the actual display board or VFO board I have had to remove these VFOs a few times over the years and remove the VFO cover,

I’m pretty sure if it is showing MHz ?off, but is actually transmitting and receiving at the right frequency … it has nothing to do with the new 10m crystals. The older display units had toggle

I have a FT-101ZD late Mk2 that had been converted to 11M years ago. I recently got around to locating the correct crystals and have aligned the TX mixer, driver and RX front end stages per the

If you are on Facebook, go to the files section of the group called: Keeping The Yaesu FT-101 Alive!

The Fox Tango Club used to have a laminated sheet with Top/Bottom of a FT 101 with alignment points indicated. Does anyone have a digital copy of this document they could send me ? Is it still

I just got a FT-101EE. It has the PB-1534 Processor board installed. It works good except : When in transmit and the meter is in the ALC position, there is no movement of the meter. Yes I have turned

Sorry- my reply never went through.? Yes, I have the cap on the audio choke.