[Boatanchors] DX 100

[Ed - K9EW]

I'd heard that - after many years - the chassis grounds tend to
deteriorate (oxidize) and become intermittent.  This could be band -
dependent.  The remedy is to loosen the screws on the ground
connections, and retighten them.  (I put a drop of DeOxit under the
ground lug before retightening the screw.)  I also ran a wire
connecting all the ground lugs in parallel with the individual chassis
grounds.  I did this on my VF-1 (same VFO as the DX-100), and it
cleared up the jumpiness.  I also found a connection to a terminal
strip lug that had never been soldered (for 45 years)!  So it would be
good to do an inspection (or maybe even a touchup) of the solder
connections.

Hope this helps.

73,
ed - k9ew
www.k9ew.us

On Nov 6, 2007 7:40 AM, Joe Dube <jdube1 at bellsouth.net> wrote:
> 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
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