[Boatanchors] DX 100

[Joe Dube]

I recently aquired several DX 100's  to refurb.  I have run into several strange problems most of which I couold take care of. One though is really confusing and I was wondering if anyone out ther has seen this before and maybe could give me a bit of advice.  The VFO is rock solid on 40-10 meters. On 160 and 80  is is unstable. It shifts several cycles at odd intervals.  It can be heard when you key the vfo by itself.  Sounds like the supply voltage is changing but  like I said before the vfo is rock solid stable on 40 and above.  That might seem to eliminate the supply voltage??    Would anyone out there have any Idea what could be the problem or have a few places for me to look without having to dismantle the VFO?  Any help would be greatly appriciated.

Joe K4TR