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From: "Gary - G4WGT" <g4wgt@tiscali.co.uk>
To: <rsgb_lf_group@blacksheep.org>
Date: Sat, 12 Aug 2006 16:48:12 +0100
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Subject: RE: LF: Re: antenna: how to get max. capacity
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Hi Rik & LF,

I remember seeing a multi top wire LF antenna with multi wire vertical
conductors somewhere & I found it in the 'Low Frequency Experimenters
Handbook' in an article written by Peter G3LDO. He shows a 4 wire top with a
4 wire vertical feed & describes it as a 'Traditional T LF Antenna'. What I
am curious about is that if it is detremental to have this multi wire
vertical arrangement as you stated, why has Peter shown it in his article? I
have an Admiralty book 'Handbook of Wireless Telegraphy' (1938) which shows
the same type of T antenna with a multi wire vertical section.  I have also
seen articles elsewhere (maybe on internet) regarding multi wire verticals &
tops were the wires are in a  circular arrangement/format & are presented as
'Cage Antennas & Cage Dipoles' although I believe to increase bandwidth.

The reason I am interested is that I have thought about a similar
arrangement because of my small garden area like Dick.

Comments invited please.

Gary - G4WGT.


-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Rik Strobbe
Sent: 11 August 2006 22:10
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Re: antenna: how to get max. capacity


Quoting captbrian <captbrian@ukonline.co.uk>:

> Make the vertical of three parallel conductors , each to the centre of
each
> top wire

Using multiple vertical wires will increase the antenna capacitance
but also decrease the radiation resistance. I guess that a thing you
don't want.

73, Rik  ON7YD - OR7T


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