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Re: [TenTec] frequency adj.

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] frequency adj.
From: Gary Follett <dukeshifi@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 23 Oct 2019 17:02:48 -0500
List-post: <mailto:tentec@contesting.com>
I suspect you MEAN off by 0.22 KHz not 0.22 Hz? 

Is it off by the same amount on all bands?

Frequency calibration of the crystal board on an Omni VI is quite different due 
to the PLL used for the crystal oscillator board compared with the open loop 
operation of the Omni V. Alignment of frequency of this board simply involves 
adjustment of the reference oscillator on the logic board. It should be 20 MHz 
dead on.

If it’s off by the same amount on all bands, it could also be the BFO. However, 
this error in frequency should depend upon mode.  LSB and USB should show 
different errors and CW yet another. Alignment of the BFO is in the TX Audio 
section for the manual. There are separate trim capacitors for each mode.

It is quite common for the trimmer caps in the BFO to become “dirty” just like 
a potentiometer or switch can get “dirty”. Cleaning is a simple matter of 
lightly spraying with non-residue contact cleaner, rotate full range several 
times, let dry overnight at least, then calibrate the BFO trimmers.

Sometimes you can get lucky and clean the trimmers by dry operating through 
full range several times without the cleaner. Then you can calibrate 
immediately since there would be no trapped solvent to evaporate out of 



> On Oct 23, 2019, at 3:13 PM, dale via TenTec <tentec@contesting.com> wrote:
> Have a OMNI VI+ ,started to set up a position for the rig today and noticed 
> the frequency  readout was off about .22 hz. I remember my old  omni V  had a 
> simple adjustment point to tweek the readout. Same on the + ? if so what 
> board and location would I find it?
> The older I get  the more I for get. 73
> dale wt4t
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