The reference oscillator provides the reference for the PLL loop on the crystal
oscillator board. Thus, an error in this signal would cause an error on all
bands.’'
This same reference oscillator also is used in the 5 to 5.5 MHz “VFO” so that
would be off on all bands if the reference were not correct.
The BFO is not likely your root cause because this would produce received audio
tone problems, sort of like the PBT setting’s being offset. Things would be
different on one sideband compared with the other.
Gary
PS: I still have a few of the TCXO replacement reference oscillators for the
Omni 6.
> On Jul 30, 2017, at 4:14 PM, John King via TenTec <tentec@contesting.com>
> wrote:
>
> Fellow Ten Tec owners, I have an Omni VI with factory upgrade and no one
> else has ever worked on it or adjusted except for an S meter replacement that
> I did. It is my favorite of all my rigs including Kenwoods and Icoms.
> It has come to my attention that the frequency has shifted downward about 89
> hz. I call a net on 3.925 mhz and I set the dial to 3.924.91 . According to
> WWV and my other solid state rigs the OMNI VI is off by that amount on all
> bands when checked on LSB. No checks have been made on USB.
> I don't know which trimmer to adjust that sets a frequency for all bands.
> Until I am certain which trimmer and where exactly it is located, I will NOT
> Touch anything inside. The modular board construction is confusing for an
> old geezer like me. Dou you have input? Thanks and 73, John, K5PGW
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