----- Original Message -----
From: "David Cole" <g3rcq@yahoo.co.uk>
To: <topband@contesting.com>
Sent: Saturday, November 10, 2007 8:55 PM
Subject: Topband: Titanex
> Hi All
>
> I have a standard 89 foot Titanex which I use on 160m - can anyone help
> by running the following through a computer model to advise the
> theoretical improvement in efficiency if I increase the Titanex by 20feet.
> The vertical is tuned against 75 radials mostly 140 feet with at least 6
> at 200 feet.
>
> I have a spare first section of a titanex - so the additional height would
> be made by 20 feet of approx 3 inch diameter tube.
>
> Many thans Dave G3RCQ
Hi Dave,
Average flat ground. Q of the coil the tuner = 250.
Results by GAL-ANA (http://dl2kq.de/galana/ ) on the NEC2
engine:
Vertical: 109 foot 89 foot
Difference
Max gain: -1.34 dBi -2,36 dBi
+1,02 dB
Gain on the
elev. angle 5 deg -5,08 dBi -7,02 dBi +
1,94 dB
If around of the antenna there are houses, trees, etc, the difference will
be more.
73 de DL2KQ
www.dl2kq.de
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