Ok. I suppose if the warm up isn't an issue or if I leave the power supply on
then the OCXO vs TCXO isn't a big deal.
As for the xtal osc board, would that be a cost prohibitive fix or should I
just find a replacement board provided that's the problem?
Service at TT said I should keep this for parts at a min for the VI+ since
parts are scarce.
I'll prob end up giving this to a new ham. Someone did that for me when I was
young and had no funds. I just want it to be up to spec.
I think an Omni VII is on the horizon once I get my Eagle.
73,
Brandon AC4OU
> On Aug 29, 2014, at 10:13 AM, "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
> wrote:
>
> The OCXO is the reference for all bands. As to individual bands, there's a
> crystal {10 of them total} being one for each band. The crystal oscillator
> is supposed to be locked to the precision reference by a PLL. It may be that
> the PLL and varactor diode is not able to pull the crystal on frequency. All
> of this is on the Xtal Osc. - L.O Mixer Board.
>
> I have noted the absolute frequency will vary from band to band by a few Hz.
> And unless the BFO frequencies are not absolutely correct, you may find a
> slight frequency discrepancy from mode to mode.
>
> 73
> Bob, K4TAX
>
>
>
>
>
>
> ----- Original Message ----- From: "Brandon Brinkley" <bbrinkley@gmail.com>
> To: <tentec@contesting.com>
> Sent: Friday, August 29, 2014 8:48 AM
> Subject: [TenTec] Omni VI Freq calibration
>
>
>> My Omni VI+ is spot on. I also have an Omni VI stock no Option upgrades.
>> I've noticed on 40 meters that I have to adjust 40 Hz high to be on freq.
>> I've verified that with other radios. On 10.000 I have to be on 10.000.40 to
>> get the side tone to match up. On 20 meters it seems either spot on or maybe
>> 10Hz off. I've let the radio warm up 30 mins or more, so the OCXO should be
>> sufficiently warm.
>>
>> Any easy fix or should I look into a TCXO?
>>
>> 73
>>
>> Brandon AC4OU
>> _______________________________________________
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>> TenTec@contesting.com
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>
>
>
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