That is surprising since the C3 has an 18' boom and uses only a portion of
it on each band and the TH7 has a 24' boom and uses most of it. I had not
read the K7LXC/N0AX report and did not know this. I was a guest op and the
TH7 (with a BN-86 balun) was not my antenna. I did unscientifically
compare it to a 4el SteppIR and saw little difference. Given the smaller
size and lack of problematic traps, I would prefer the C3 if the
performance was equal or better. My Aruba station had a 4el homebrew 20m
beam on a 36' boom which seemed to work well.
John KK9A
To: <towertalk@contesting.com>
Subject: [TowerTalk] Mosley Antenna Question
From: "Jim Thomson" <jim.thom@telus.net>
Date: Mon, 23 Feb 2015 23:34:18 -0800
Date: Mon, 23 Feb 2015 11:23:38 -0600
From: "john@kk9a.com" <john@kk9a.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Mosley Antenna Question
The TH7 is not a bad antenna, I find it difficult to believe that a C3 out
performs it. I had the world high 20m score in the last WPX CW using a
Hy-Gain TH7DXX
John P40A
## sadly to say, yes indeed, a C3 will outperform a TH7-DXX. K7LXC already
ran that test.
N6BT ran the test as well, using a spectrum analyzer at the RX end, with
SA set
to 2db per division.
## A C3 is like 4.1 dbd....and your TH7-DXX is less than that. The sa or
audio gear just reads it as..
X on ant #1..... and + /- X on ant #2.
## Compare a C3 with a Mosley TA-33jr in the above format....and the
results
will make u gag. Gets
even worse when a TA-32jr is used.
Jim VE7RF
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