If you're not comfortable doing board level work, send it to Ten-Tec for
I recently replaced C31 in my Omni 6. The cap replacement was easy.
Getting everything calibrated and the PLL happy was tricky.
BTW, you need to make sure your BFO oscillators are aligned before doing
WWV calibration. If the Wiki doesn't say that, I'll add a note.
On Thu, Feb 9, 2012 at 11:24 PM, Gary Winkelman <email@example.com> wrote:
> I have an Omni 6 Opt 3 , it's a great radio. I'm basically a CW and RTTY
> operator, I haven't made a SSB contact in years. I do enjoy the DX packet
> cluster and controlling my radio with Logger32 and N1MM. I found that when
> I moved to a cluster spot, I was somewhat off frequency, about 50 Hz. I
> know that's not much but I'm rather anal about stuff like that. I realize
> that the spotters radio might not be correct but it should be close. I
> decided to do the WWV calibration as described in the Wiki. My radio does
> not have a TXCO oven so my adjustment was at C31 on the Logic board. I
> expected to have to move it a tiny bit but what I found is that C31 was not
> smooth or linear at all and the frequency readout jumped around and even
> small movements would unlock the PLL and the radio would go silent.
> Turning the power off and on again would bring it back but then I would
> have all kinds of strange stuff on the readout like 41 MHz or 2-E2.1... I
> did a master reset and it went back to normal. It is not on frequency (30
> to100 Hz off) and the PLL randomly drops out after being on for a while.
> I only have a multi meter and I'm certainly not qualified or comfortable
> doing board level work or calibration. I know I should have left well
> alone but that's water over the dam now. Could C31 be faulty and causing
> the problem or did I do more damage?
> Any suggestions?
> Gary N2UM
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