[TenTec] help with Corsair II tx/rx off freq issues

[Mike Hyder -N4NT-]

Scott, the offset zero adjust pot is on control board, 80978 of the Corsair 
II.  Page 3-31, Paragraph 3 - Schematic Diagram is on Page 3-32

"The offset tuning zero adjustment is accomplished by centering the offset 
tuning control and noting the frequency display.  Turn the offset select 
switch to off and adjust the potentiometer R12 so the display returns to its 
former state.  Final adjustment of this control can be made by alternately 
switching from OFF to MIN and back again while adjusting R12 for no change 
in receive signal pitch."

I have encountered problems such as you describe in an Astro 102BX.  In the 
Astro the problem was a dirty offset zero adjust pot.  Finding this trouble 
the first time was a real poser as I had no idea that such an adjustment was 
extant.  I got the Astro and the Corsair II used and the latter probably 
came with that pot misadjusted.    Good luck.  Please let us all know what 
trouble you find that we all may benefit from your work.

Good Luck and 73,
Mike Hyder  -N4NT-

----- Original Message ----- 
From: "Mike Hyder -N4NT-" <Mike_N4NT at charter.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, November 20, 2011 11:27 PM
Subject: Re: [TenTec] help with Corsair II tx/rx off freq issues


> Scott, I believe there is an internal pot which balances the RIT pot on 
> the
> front panel. It sounds like it is not set correctly. Hope that's your
> trouble for it's an easy fix.
>
> 73, Mike N4NT
>
> ----- Original Message ----- 
> From: <scottsheppard at videotron.ca>
> To: <tentec at contesting.com>
> Sent: Sunday, November 20, 2011 9:13 PM
> Subject: [TenTec] help with Corsair II tx/rx off freq issues
>
>
>>I just recently picked up a lovely Corsair II (to add to the TT madness)
>>and the DDS kit from N4YG,,,the difference, by the way, is amazing and
>>makes the rig an even greater pleasure to use than before.
>>
>> Upon installing it and actually using the rig a bit, however, I note that
>> my Tx and Rx freq are not aligned. Its not that the rig display may be a
>> bit off but rather the station signal I am listening to is on one freq 
>> and
>> when I transmit back, I am about 600hz off (as though working 
>> split--which
>> I am not), I did not adjust anything else after the install but the issue
>> may have been pre-existing.
>>
>> Seems to me I had similar issues on an older Omni A but don't recall what
>> I tweeked or balanced...any thoughts from the Corsair crowd?
>>
>> 73
>>
>> scott va3ied