[TenTec] OMNI V Frequency Changes

Carl Moreschi n4py3 at earthlink.net
Thu Feb 27 13:50:12 EST 2014

The band crystals may be aging.  I found my 40 meter crystal worked best 
if I moved it about 2 khz from where it was supposed to be and then used 
the N4PY calibration procedure to bring it back it.

You might want to play around with each trimmer for each band crystal. 
If you can find a place where the crystal no longer runs, move the 
trimmer quite a bit past where the crystals starts running again.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549

On 2/27/2014 1:29 PM, Ed Purvis wrote:
> For several months my OMNI V was off frequency from the readout by about 10 to 15 cycles.  Just enough for contacts to mention having to use RIT.  I installed the N4PY chip which allows me to bring display and output together.  The new chip made this a very different and enjoyable radio and the off freq. nuisance was gone.
> Lately, there has been a freq. jump when changing bands.  The calibration is not holding.  The long term stability is good if left on one band.  The only work I have done is tighten screws on logic board and reset connectors.  No improvement.
> My only thoughts are:  Y1 crystal, VFO encoder.  Not sure beyond those as possibilities.
> Any input will be appreciated.
> Thanks,
> Bradenton, Fl
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