#12 wire is 0.080", #8 is 0.128. This is not a big enough diameter change
to make a difference.
John KK9A
Re: [TowerTalk] 160 meter odditiy
from [Ron W8RJL] [Permanent Link][Original]
To: "Tower and HF antenna construction topics."
<towertalk@contesting.com>
Subject: Re: [TowerTalk] 160 meter odditiy
From: "Ron W8RJL" <youngron@verizon.net>
John,
The larger the diameter of the conductor the lower the frequency for the
same length. It used to be called the K factor but I think they have a new
name for it. Check any good antenna handbook for formulas etc. You can
correct by trial and error, just folding back a few inches on either end and
clamping with a split bolt. Using a 3" diameter tube vs a #12 wire on a 40
meter 1/4 wave vertical can be the difference between 30 and 33 feet if I
remember correctly.
73,
Ron W8RJL
-----
-----Original Message----- From: john nistico
Sent: Tuesday, January 6, 2015 6:01 PM
To: towertalk@contesting.com
Subject: [TowerTalk] 160 meter odditiy
I have been using an inverted l from my hdx 89 tower with much success. It
is made of #12 stranded wire and I have decided to upgrade it to something
more beefy. I removed the antenna which played at 1840 like gang busters and
cut an Identical wire #8 and put it up in its place. No other changes were
made but when I went into the shack and checked it it was at 1723. Anyone
have an idea why 2 identical wires would appear so different?
John J. Nistico
911 Electric Inc.
516.325-8993
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