[TenTec] Corsair 2 RX issue

[Andrew Moore]

Hi Shawn -

The symptoms you describe aren't the same as what I ran into with my
Corsair II (jumpy VFO) but might be related. I'm almost certain the fix
here was exercising variable resistor R29 on the oscillator/mixer board
(80975). I think got crusty and oxidized over the years. It's part of a
bias circuit for some bands. This includes 20 meters, so again, might have
nothing to do with your issue, but it's an easy fix to try.

Locate 10K potentiometer R29, and put two marks on it - one on the moving
part, one on the static part - so you can put it back where it started. Run
the pot back and forth a bunch of times and return it to the original
position.

73 de NV1B
..


On Wed, Sep 14, 2022 at 10:58 PM Shawn Upton via TenTec <
tentec at contesting.com> wrote:

> I do mostly 40m CW, and sometimes I have issues with RX.  It will just
> fade away.  I tap the key and it comes back.  few seconds later, it fades
> away...
>
> Thing is, it will not do this cold.  Sometimes it won't do this for an
> hour.  Then do for a few minutes, then work its way out of it.  Other times
> it seems to keep doing it once it starts.  Sometimes it will just do it to
> annoy me...  I don't work other bands all that much but I don't think it
> did it the other weekend on 20m, but maybe it was just in a good mood.  I
> tried wiggling the band knob tonight and that did not seem to help when it
> was acting up.
> I haven't looked at the schematic but I'm guessing the TX/RX relay is on
> the way out.  But wondering if anyone else has seen this and has advice.
> Thanks,Shawn kb1ckt
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