I had that exact problem with my Corsair I. There was a electrically
leaky bypass capacitor on one of the counter preset
lines on the counter board. Very glad it wasn't the counter chip,
which appears to be obsolete!
Bob WB2VUF
"Dr. Gerald N. Johnson, electrical engineer" wrote:
>
> I'm recalling a vague recollection that some of the analog tentecs lost
> a couple capacitor in the counter to give this symptom. There could also
> be a solder connection problem in the counter input circuit that would
> be temperature sensitive. Application of alternating heat and cold
> should identify component or connection fairly rapidly.
>
> 73, Jerry, K0CQ
>
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