John,
if you believe the problem is the XTALs then the first step would be to
unsolder them and check / measure them?
BR
Gerd.
2017-02-24 4:24 GMT+01:00 Steve Ellington <steven4lq@gmail.com>:
> John
> I keep seeing examples of this and so far I have not seen an easy cure.
> I can warn you however....If you start messing those crystals and
> attempting to "peak up the coils" you risk upsetting the VCO lock and
> before you know it your frequency is jumping all over the place. Those
> crystals change frequency over the years and the VCO is supposed to pull
> them back on frequency. The VCO is locked with the master CPU oscillator.
> Feel fortunate that it still works at all. I believe TenTec has totally
> quit working on them. Personally I consider them EOL....End of Life.
> Let us know if you discover a fix.
> 73
> Steve N4LQ
>
> On Thu, Feb 23, 2017 at 5:58 PM, John Callari <john.callari@gmail.com>
> wrote:
>
> > Hello all..
> >
> > I recently acquired an Omni VI... After warming up, some bands are dead
> on
> > (17M, 15M), some are off a little bit (40M, 80M) about 500 Hz and 20M is
> > off by nearly 1.5 kHz.
> >
> > I've worked on some of my older Icom rigs (751, 745, 765) and was able to
> > re-calibrate them and re-align... but that was following the service
> > manuals...
> >
> > Any suggestions on the best way to fix this... From what I've read and
> > looking at the manual, I'm guessing that my problem is with the band
> > crystals on the XTAL OSC/ LO board...
> >
> > Any help would be much appreciated.
> >
> > Thanks!
> >
> > John
> > K2JNC
> > _______________________________________________
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> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
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