[TenTec] Fw: Omni C transmit off frequency

Curt rhulett1 at consolidated.net
Tue Mar 22 10:07:28 PDT 2011

Yes, thanks Mike.  I had found R-16 after your first message, of course I 
violated rule #1, RTFM. Never imagined an adjustment for that, figured a 
component failure.  Adjusted per the manual, also adjusted R-9 on the OT-TR 
board, and the display timebase, used some wire wedges to tighten up the 10M 
band crystal.

A long way from mint, but seems to be working ok for now.

73, Curt KB5JO

----- Original Message ----- 
From: "Mike Hyder -N4NT-" <Mike_N4NT at charter.net>
To: "Ten-Tec Reflector" <tentec at contesting.com>; <rhulett1 at consolidated.net>
Sent: Tuesday, March 22, 2011 9:04 AM
Subject: [TenTec] Fw: Omni C transmit off frequency

> My manual shows the control of which I speak on page 3-56 on the 80708
> Control Board.  It is R-16.  The manual says, "Trimpot R16 is adjusted to 
> a
> value equal to the center position voltage of the OFFSET control, in 
> essence
> the voltage representing NO offset."
> ----- Original Message ----- 
> From: "Mike Hyder -N4NT-" <Mike_N4NT at charter.net>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Tuesday, March 22, 2011 8:41 AM
> Subject: Re: [TenTec] Omni C transmit off frequency
>> Two things come to mind:
>> 1. An internal potentiometer used to set the offset when the OT control 
>> is
>> turned off.
>> 2. The carrier oscillator, set by adjustment of three separate trimmer
>> capacitors. (I'm not sure this could even be the problem, but it did come
>> to
>> mind).
>> I'd suggest finding and adjusting #1 first because it requires no
>> instruments to accomplish and it is probably the culprit.
>> 73, Mike N4NT
>> ----- Original Message ----- 
>> From: "Hulett, Russell" <rhulett1 at consolidated.net>
>> To: <tentec at contesting.com>
>> Sent: Monday, March 21, 2011 9:21 PM
>> Subject: [TenTec] Omni C transmit off frequency
>>> Am back to working with "mint" Omni C I foolishly bought.  After tuning
>>> onto a sideband frequency, my transmitted signal is off frequency for 
>>> the
>>> other op, as if RIT were on though it is not. Any ideas?
>>> 73, Curt KB5JO
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