> I have just acquired a Corsair Model 561. Fine rig, but I get PTO
> instability on CW all bands. Not slow drift, but frequent step changes up
> and down of a few 10s of Hertz over long periods. Also, warbling can be
> heard as band is tuned. Have checked that the regulated voltage supply is
> steady. Frequency of PTO is not affected by vibration.
>
> Any suggestions on the source of the problem and a fix, please? How do I
> remove the PTO to check components, solder joints, etc?
>
> Regards
>
> Mike G0EFO
>
> Guildford UK
>
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