In the mid/late 70's I was at W2PV operating the second 20m CW
station, sitting next to K1AR operating 20m station #1. I recall
being able to get pretty close to the CQ freq without problems. I
have no idea if and what external filtering was used.
73 Barry
--
Barry Kutner, W2UP Internet: w2up@itw.com
Newtown, PA FRC alternate: barry@w2up.wells.com
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>From Zack Lau <zlau@arrl.org> Mon Jun 22 16:21:03 1998
From: Zack Lau <zlau@arrl.org> (Zack Lau)
Subject: [CQ-Contest] Two Radios, one band
References: <6mkt43$5q$1@mgate.arrl.org>
Message-ID: <358E765F.3900@arrl.org>
I've personally built an 8 kHz wide 75 meter bandpass filter
and a 29 kHz wide 40 meter BPF using LC filter techniques.
While lossy, I have no trouble hearing the local noise as I
tune across the passband. The 75 meter one doesn't seem to mind
a watt or two of RF from the adjacent channel--I used it in the
last Phone SS while the W1AW bulletins were running across the
parking lot.--Zack W1VT
I thought of writing up the 40M one for QST but putting it in QEX
leaves more room for contest results. No complaints from the QEX
editor!
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