Ken,

Think helical. Several years ago I made a 40 meter J-pole using twin lead.
Wound it around 10 ft. of 1" PVC pipe. Worked well for field day, signal
strengths comparable to those from a full sized dipole... but with the
advantage of being omni-directional. Get some 4" or 6" PVC sewer pipe and do
the math for length. Should be interesting. Hmm, think I'll go visit Radio
Shack soon!

73,
Dale NJ7C

Dale and Nancy Chidester wrote:
Ken,

Think helical. Several years ago I made a 40 meter J-pole using twin lead.
Wound it around 10 ft. of 1" PVC pipe. Worked well for field day, signal
strengths comparable to those from a full sized dipole... but with the
advantage of being omni-directional.

Hmmmmm, 6 dBi omni-directional gain - quite impressive - usually
requires a phased array.
--
73, Cecil http://www.qsl.net/w5dxp



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William,
As long as the FAA and NASA don't object, and you have the
money
to pay for it, there is no maximum height for amateur antennas.
There is a practical one, though. Who would you get to climb it
to
change the lights when they burned out?
'Doc