For what it's worth .....
My Omni VI manual says to adjust R3 and R4 on the Tx Audio board (81597) for
minimum carrier. These pots adjust the AC balance, and DC balance, respectively
of U4 - the balanced modulator IC (CA3053E).
You might try the adjustment while listening to the residual carrier on another
receiver. The problem with a VTVM or RF probe is that they are not frequency
selective and so they could be measuring other signals emanating from the rig.
73,
Steve G3TXQ
----- Original Message -----
From: OTAKEBI@aol.com
To: tentec@contesting.com
Sent: Monday, January 15, 2007 7:35 PM
Subject: Re: [TenTec] OMNI SIX problems
Bob, this is something you could probably do yourself but not only will you
need a VTVM but an RF probe and most of all the Ten Tec alignment process to
null the carrier.
I don't think TT will give out that service information.
Could be someone on the list has it.
And, you might find that the carrier won't null in which case another
component has gone bad and you will need to track it down.
Very seldom will a rig just go out of alignment all by itself unless you
replaced something in the circuit.
You should not go about trimming any pots before checking for that type of
problem.
Dan/N4VET
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