[TenTec] Omni VI freq instability, 30m only

[Steve Baron - KB3MM]

----- Original Message ----- 
From: "Ben K8DIT" <benk8dit at callatg.com>
To: "Steve Baron - KB3MM" <SteveBaron at StarLinX.com>; "Discussion of Ten-Tec
Equipment" <tentec at contesting.com>
Sent: Monday, April 04, 2005 03:39
Subject: Re: [TenTec] Omni VI freq instability, 30m only


> The VI has a PLL that incorporates those single crystals/band in a
> synthesized scheme that mixes and feedsback, get divided, multiplied,
phased
> and split, then poured into glasses and served with lemon. If your 10Mhz
> oscillator is doing what its supposed to, the signal fed to the LO wont
let
> you get very far off the beaten path you put it on. Yes, sometimes one of
> the crystals will wander off.

Mine was fine at turn on but after abt 10 min rcv and xmit on the 10A band
was gone.  New crystalwas cheap $12 maybe and relacement was easy
Setting the freq was the only PIA but I have an old HP 50 MHZ counter and
I learned that 80 M was 200 Hz off so that was an added benefit.
Yes, there is a possibility of component

> failure, yes, its complicated, but most of all its clever.
and produces a clean signal.

 (Im not an
> engineer, not even a technician, so while it was explained to me in
layman's
> terms, I could only slap my forehead.)
> Folks here seem to want to blame the VCXO. Its an easy target. Dont do it.
>
>
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