| Hi Ken -
I had a similar problem.  Needed a new crystal oven.  I understand you 
can buy the TCXO that is a fairly simple replacement, too.  Not 
expensive.
Clark
WA3JPG
On Sep 22, 2007, at 3:55 PM, Ken Brown wrote:
> Hi all,
>
> My Omni VI has a cyclical drift problem. It sounds like a PLL drifting
> away from lock and then being pulled back into lock over and over 
> again.
> My first guess was that one of the crystals or other components on the
> XTAL OSC. - L.O. MIXER BOARD had aged to the point where it was
> difficult to keep it locked.
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