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@charter.net>
To: "Discussion of Ten-Tec Equipment" <tentec@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@videotron.ca>
To: <tentec@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
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