[R-390] Need value of R235 from a RF deck
Barry
n4buq at knology.net
Wed Jul 30 09:30:33 EDT 2008
> Replaced about 5 silver micas this evening. Will double check my
> wiring/soldering in the morning.
>
> Going to check the circuits in the morning with a frequency counter &
> scope.Might be able to narrow the problem down to the 200KC circuit or the
> multivibrator.
>
> Note: one of the silver micas (15pF) had a crusty coating on one lead.
> I'vetried to remelt most of the solder joints, but this cap was in a
> positionhard to reach. Had to remove other components to replace it. That's when
> Ifound the crusty coating. Don't know if the solder area was clean, it
> wasdamned hard to remove! It's clean now.
>
> Craig,
Craig,
I was going to advise just what you're planning. If you have a good frequency counter, look at the 200kc oscillator while switching bands, modes, etc. That should tell you if the problem's in the marker or elsewhere.
Good luck with it,
Barry - N4BUQ
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