On 3/20/2014 4:40 PM, john nistico wrote:
I have put up a 80 wire vertical in some trees seeing I do not have a tower. I
cut it 62ft6in so it should be on 3.750 however it seems long and the swr is
1:1 at 3550 or so. I have 10 radials and my longer version worked just fine.
Any feedbck would be helpful.
Hi John,
If you have 1:1 SWR with a resonant quarter wave vertical, you have a
poor radial system. The resistance at resonance of a quarter wave is
about 35 ohms with an ideal radial system. That means you have 15 ohms
of loss in the radials. 1:1 SWR is NOT a design objective for a quarter
wave vertical! Instead, I would work on improving the radial system.
Either a LOT more on-ground radials, or raise the radials as high as you
can.
73, Jim K9YC
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