开云体育

I double-checked the scope settings and found I had the wrong measurement selected. The actual output of the 78L08 is just a hair over 8V, and the switch, Pre-Mix Local socket and the board itself

I'm trying to diagnose a problem with the higher bands where the VFO display will change to random frequencies while transmitting. Specifications for the PB-2153 are 300mV output on Pin 3, where I am

Rewiring the RL-1 socket is not something I want to do; but the Potter & Brumfield relay is so tantalizingly close to what the FT-101 uses... Luckily for me, my OM likes to make electronic gadgets

Thank you Jim. That sounds very plausible. I’ll give it a try.

This sounds like an analog problem. You may be losing too much signal amplitude of the LO signal feeding the counter at the higher frequencies. Glancing over the schematic I think i would look at the

I still have a couple of issues remaining with the "Parts" FT101ZD I'm restoring. It looks like I have a frequency counter issue. ?The counter works 100% on all bands except on any of the 10 meter

Even after a careful online search and checking with my ham friends, I was not able to find the female Jones plug for the AC input to my newly acquired FT101ZD. ?There are six pin Jones plugs out

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