Topband: Tophat? Does it have to be at the top?

Earl W Cunningham k6se at juno.com
Thu Jun 10 11:10:58 EDT 2004


George, VK5ALS wrote:

"My plan is to erect a 40-foot vertical using 1 1/2 inch diameter
aluminium masting then to use the top set of four guy-wires declined at
45 degrees with a skirt wire connecting the bottoms together."
==========
If the four guy wires are each 38.5 feet long, that will be very close to
resonance at 1.830 MHz according to EZNEC.  The feedpoint resistance will
be about 2.2 ohms at resonance.

Modeling was done over "average" soil and #10 AWG wires were used for the
guy wires and skirt wire.

73. de Earl, K6SE


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