[TowerTalk] Shunt feeding tower with stacked tribandersfor 160

Steve ve3tu@rac.ca
Tue, 28 Nov 2000 19:15:42 +0000


Hi Pete, just wondering how you have the 4sqr set up for 80m. Regular verticals
with a ground plane on the ground or as vertical dipoles? I have a 150 ft. tower
to work with, any comments on performance?

tu Steve VE3TU

Pete Michaelis - N8TR wrote:

> Pete,  It works just fine here.  My tower is 100' tall with 3 sets of EHS
> guys well broken up with insulators.  At about 108' is a 40-2CD 2 element
> 40 meter beam.   I have a KT34XA at 100', another KT34XA on a
> Ringrotor at 64', and a  third  XA at 32' on a swing-arm sidemount.  There
> are 4 ropes from the top  of the tower  to various tie points that support
> the 4 vertical wires that make up my 80m 4-sq.   I shunt feed the tower
> for 160m at about 62' using  4 wires in a  small cage configuration.   I have
> 36 1/4 wave ground radials for 160.  Also each of the 4  80m wire
> verticals has 36 radials.
>
> I am very pleased with the performance on 160m.  I generally compete
> in the CQ 160m SSB contest in the M/S class with several friends
> from the local DX club (NODXA).   We usually do pretty well.  Also  many
> of the major DX expeditions have been worked on 160.
>
> I did originally try to use elevated radials but it just did not work all
> that well.  The ground radials made a big difference here.
>
> I would some day like to computer model the entire system but that will
> have to wait till I have software that can handle more than 500 segments.
>
> Give shunt feeding a try and see what happens.
>
> 73 Pete - N8TR
>
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