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Roy Lewallen · July 10th 06, 07:15 PM posted to rec.radio.amateur.antenna

wrote:
Wayne wrote:
"JSF" wrote in message
. ..
Anyone used one and if so how did it compare to a 1/4 wave.
I build one for 2 meters some years ago. The element was 1/4 copper tubing
with an air spaced variable at the end, and fed with a modified gamma match.
The antenna was about 3 inches tall, and it fit on top of my van without
hitting the garage on the way in.

That makes sense.

For 80 meters we'd have an antenna 40 times taller and thicker, or a 10
inch diameter copper pipe element 10 feet above a metal plate a
wavelength in radius as a groundplane, and only be about 3dB down from
a 1/4 wl vertical.

I'll run right out and build one. :-)

And wait'll you see the bandwidth! You'll be a busy guy running out and
tweaking the capacitor every time you QSY.

Roy Lewallen, W7EL