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Re: Topband: Common mode choking of beverages

To: topband@contesting.com
Subject: Re: Topband: Common mode choking of beverages
From: Mikek <amdx@knology.net>
Date: Tue, 6 Oct 2020 12:22:42 -0500
List-post: <mailto:topband@contesting.com>
I've seen Cat 5 and 6 cable used up to 20MHz on one pair, power on another and data 
on a third, perhaps switching on a fourth pair. I know this >works for distances 
of at least 20 metres and I wonder if it would be good at LF for 10 times that 
distance.  It's also very tough and modestly >priced cable.  Can it be seen as a 
good use for this sort of application?

David G3UNA/G6CP

 My experience, I have short BOG with a 230 foot CAT5 feed line. I use it 
mostly for AMBCB receiving.
Signal strengths are good, S9+ on night time 1000 mile away stations. Daytime 
reception is also good.
But I have no comparison to Coax. My common mode chocking is, "I've been told 
unconventional", "probably
doesn't work", however my feedline doesn't pickup AM stations, so if my BOG has 
any directionality,
the feed line doesn't alter that.
 I tested Coax against a twisted pair, twisted pair had much, much, less signal 
ingress. I was told "coax
doesn't have ingress" and "you must have had bad coax"  maybe...
                                 Mike Knowlton KF4ITA


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