Your procedure is exactly correct. Tune for exact zero beat with the zero
beat button pushed. Then tune the offset for the tone you want to hear.
And you can try both sides of zero beat with the offset control. Sometimes
one side has less QRM than the other.
Carl Moreschi N4PY
121 Little Bell Drive
Hays, NC 28635
www.n4py.com
----- Original Message -----
From: "Curron HILL" <kb3drw@msn.com>
To: <tentec@contesting.com>
Sent: Wednesday, January 27, 2010 6:54 AM
Subject: [TenTec] Century 21 Question
>
> Can some one explain how to use the zero beat and offset controls on a
> Century 21? It is a DC receiver and different than I have ever used. I
> know that pressing the zero beat button disables the Offset control. I
> know that you tune the CW sound until it goes down to point that you can't
> hear it. If you continue to tune you hear the CW begin agian going up in
> pitch. So you back up until it can't be heard again. Then you tune the
> Offset until it has a pleasant sound. The offset it tuning the reciever
> only and the transmitter stays zero beat correct? Is it that simple? Or
> do you have to anything about which sideband the band works from? Why the
> +/- on the offset? is it so that you can listen to either side of the CW
> from the Zero Beat point and maybe get away from other transmissions on
> one side of zero beat or the other to help eliminate QRM?
>
>
>
> Thanks, and 73 Curron KB3DRW
>
>
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