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Re: Duplexer(s) for mode VU



Alan,
A single cavity on 70cm should work fine, a lopas filter like in the old
motorola VHF Micor's would make a good low pass filter for 2m, a cavity is
reenterant on the third harmonic an is of little value on the 2m transmit
side.

Art, KC6UQH
----- Original Message -----
From: "Alan P. Biddle" <APBIDDLE@mailaps.org>
To: "AMSAT-BB" <AMSAT-BB@AMSAT.Org>
Sent: Sunday, June 27, 2004 3:49 PM
Subject: [amsat-bb] Duplexer(s) for mode VU


> Hi,
>
> A question about using duplexers to reduce desense in mode VU (J)
> operations.  You can put one in the V TX line to reduce the 3rd harmonic,
> and from the U antenna to reduce the V fundamental overload.  Which, or
> both, do people use?
>
>
> Alan
> WA4SCA
> ----
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