Clark Savage Turner WA3JPG wrote:
>
> costs about $50. Now I will go in there with my frequency
> counter and carefully determine whether it is the oven/crystal
> that is drifting or the BFO. Anyone ever have to deal with
> either of these with any tips? I plan to measure the freq of
> the output of the 10 MHz master oscillator over an hour or two
> at intervals of about 10 minutes to see what that is doing. I
> figure that ought to tell me enough of the story to get it
> right.
>
> Clark
> WA3JPG
>
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Clark:
The bfo trimmer has been know to cause problems. I beleive it's the
brown one on the tx/audio board. A counter on the output of the bfo will
tell the story or just a stable receiver with a short wire near the tx
board can easily receive it and check for drift. My trimmer developed a
tendency to jump and a shot of wd-40 cleaned it right up. Give it some
time to dry before calibrating it.
Steve
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