Tim,
That certainly sounds like a bad solder connection or an unsoldered one to me.
Look in the BFO area first if it effects the filter passband, otherwise the VCO area is another possible candidate for suspicion. Yes, even in something that has been working for almost 6 years, an unsoldered connection can still be the source of a problem.
Use the schematic and parts placement diagrams in the manual to locate the questionable components.
73,
Don W3FPR
> -----Original Message-----
>
> For awhile, I've been experiencing a down shift of about 200 hertz, but
> rarely and randomly in my K2 serial 0063. It's enough to change the
> characteristic tone in the receiver and degrades from the filter settings.
> Any suggestions as to where to start looking? Doesn't seem to be
> temperature-dependent but I could be wrong. And it, randomly, shifts back
> as well. Thanks.
>
> Tim K5OI
> Ruidoso, NM
>
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