[TenTec] OMNI VI crystal oven

[John Holliman]

Steve Ellington wrote:
> 
> Clark Savage Turner WA3JPG wrote:
> >
> > costs about $50.  Now I will go in there with my frequency
> > counter and carefully determine whether it is the oven/crystal
> > that is drifting or the BFO.  Anyone ever have to deal with
> > either of these with any tips?  I plan to measure the freq of
> > the output of the 10 MHz master oscillator over an hour or two
> > at intervals of about 10 minutes to see what that is doing. I
> > figure that ought to tell me enough of the story to get it
> > right.
> >
> > Clark
> > WA3JPG
> >
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> 
> Clark:
> 
> The bfo trimmer has been know to cause problems. I beleive it's the
> brown one on the tx/audio board. A counter on the output of the bfo will
> tell the story or just a stable receiver with a short wire near the tx
> board can easily receive it and check for drift. My trimmer developed a
> tendency to jump and a shot of wd-40 cleaned it right up. Give it some
> time to dry before calibrating it.
> 
> Steve
> 
> --
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I had the same problem.  I cleared it up with a shot of TV tuner
cleaner.  Rotate the trimmer full cycle about 5-6 times.  Retune it by
ear on WWV and no more problems for several years.  TenTec service
coached me on this.

73 de John, WA5TWL

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