[R-390] A Few R390A Issues

[Tim Shoppa]

Jim M writes:
> #1  There is supposed to be a little spring across the two halves of the
> Oldham coupler (on the PTO shaft).  If it is missing, there will be some
> play.  Sometimes it gets lost when others have worked on the radio.
> Bill KB9IV wrote:
>> The PTO won't stay zeroed.  I put the dial on a calibration point then snug
>> the "Dial Zero".  Turn the PTO till I get a Zero Beat then totally release
>> the "Dial Zero".
>>
>> If I turn the PTO upward 10-20 KHz upward then tune the PTO downward the
>> zero point has now change 10 KHz. The PTO has slop in that the when turning
>> the VFO the Dial doesn't  move with turning it. About a 1/5 of a turn
>> slop.........is
>> this typical?

One fifth of a turn slop is not at all explainable by the Oldham coupler spring.

It must be a loose clamp or gear between the knob and the counter. Or maybe
the "Dial Zero" setting isn't totally releasing - a lot of old grease can cake up around
there!

Tim.