[TenTec] Omni VI freq instability, 30m only

[Ben K8DIT]

The VI has a PLL that incorporates those single crystals/band in a
synthesized scheme that mixes and feedsback, get divided, multiplied, phased
and split, then poured into glasses and served with lemon. If your 10Mhz
oscillator is doing what its supposed to, the signal fed to the LO wont let
you get very far off the beaten path you put it on. Yes, sometimes one of
the crystals will wander off. Yes, there is a possibility of component
failure, yes, its complicated, but most of all its clever. (Im not an
engineer, not even a technician, so while it was explained to me in layman's
terms, I could only slap my forehead.)
Folks here seem to want to blame the VCXO. Its an easy target. Dont do it.