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Old January 3rd 04, 09:00 PM
J Tabor
 
Posts: n/a
Default tower shunt feed for 160m

Greetings,

The ON4UN book has a good section on this subject. Nice charts and graphs to
get an idea of where to find the best feed point etc. Unfortunately he
doesn't discuss the effect of tower guy wires.

My tower, 110 ft Rohn 25G with 5 sets of guys. The guy wires are
un-insulated and grounded at bottom using braid and ground rod. The top set
of wires are of course about 120 ft long each. Have Force 12 C-4S on top
with 10 ft of mast; about 4 ft extra mast above beam - poor planning on my
part.

Any hints on how to model this? Easiest app to use for this etc would also
be appreciated.

I've been told one can use an antenna analyzer, like mfj 259b, to find match
point. Is a good way?

Thanks,
Jim - ku5s
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