It's easy enough to measure the degree of coupling between beverage and TX
antennas with a common signal generator. My experience in a quiet location
with an elevated feed quarter wave vertical with two elevated radials has
been that you need at least 35 or 40 db of isolation. If you're down in the
20-30 db range, your beverage isn't going to do you much good.
73..Dave
W0FLS
-----Original Message-----
From: topband-admin@contesting.com
[mailto:topband-admin@contesting.com]On Behalf Of k6se@juno.com
Sent: Sunday, September 08, 2002 10:57 PM
To: Topband@contesting.com
Subject: Re: Topband: Coupling between bev and other antennas
When I had about five Beverages, they all came to within 20 to 50 feet of
my 160m towers. All of them had good F/B and F/S ratios, so there wasn't
any apparent coupling to the towers and resultant degradation of the
performance of the Beverages.
73, de Earl, K6SE
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