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[TenTec] Re: ~ 1/4 wave 160 doublet

To: tentec@contesting.com
Subject: [TenTec] Re: ~ 1/4 wave 160 doublet
From: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>
Reply-to: tentec@contesting.com
Date: Tue, 21 Oct 2003 22:38:11 +0000
List-post: <mailto:tentec@contesting.com>
Thanks Jerry for the explanation; it makes sense. The solution for me would be to extend my feedline by 60 feet. I pictured feedline zig zagging across my back yard (gotta put it somewhere) and decided things are okay as-is, hi. One thing that develops with experience is an instinct for knowing when to leave something alone. When I was in the Army and right out of signal school at my first field assignment, on the first day my shift chief showed me racks of old vacuum tube gear humming along that we were supposed to maintain and said, "Rule no. one: If it works, don't #### with it."
That was how my real technician education began.


73,

Rob Atkinson
K5UJ

<<There is a "magic" feed line length to make tuning easier, that's when
the length of the feeder and one half the antenna make a multiple of 1/4
wave. >>

I have heard this before several times but never with the length of 1/2 the antenna. What I always heard was to avoid a balanced feed lenth that's an even multiple of 1/4 w. at your lowest operating frequency (band). If I add 1/2 of my antenna I've got a length that's 1/2 wave on 75--ooops. The Matchmaster seems to be happy though but I'd like to know why 1/2 of the antenna is added in.

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