It’s obvious you understand the radio well.
I had one board, sold it, may have another.I’ll have a look around.
> On Apr 8, 2018, at 2:51 PM, Peter Bertini <radioconnection@gmail.com> wrote:
>
> Gary
>
> All of my Omni's are using TXCO upgrades. The problem is not related to
> the 20 MHz reference.
>
> These are the ten individual locked hetrodyne osc. crystals--phase lock can
> be set by adjusting for minimum pulse width on pin 11 of U13 on the
> processor board. I suspect some of the crystals are aging, or there are bad
> padding disc ceramics. 80 and 160 meters crystal drift very fast and lose
> lock range quickly as the temp in that compartment rises. Eyesight ain't
> what it was, and I don't want to deal with going overboard with repairs if
> a donor board shows up.
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