[Antennas] J pole horizontally polarized antenna

[Elliott Olson]

oops, found my problem, reply didn't address to mailing list first 2
times.

Hello Dan,

If you break the antenna at the 1/4 wave points (at the end of the
matching section and cut the ratiator in half) and insert 1/2" copper
to 3/8" IPT (pipe thread) adapters, male and female, at each point,
you'll have a breakdown antenna without worring about fatigue from
bending and straightening. You can even put elastic down the middle to
keep the parts together like tent poles. I've also seen one with
elastic made with 1/2" copper couplers only soldered on one half so
they will slide apart for travel.


Tuesday, June 8, 2004, 9:07:17 AM, Dan wrote:

DP> I have been asked to construct an antenna for a small community TV
DP> transmitter somewhere in Africa on our channel 7 (174-180MHz). The J
DP> pole or super J pole looks like a good candidate, but I believe it is
DP> vertically polarized. Is there any way to make it horizontally polarized
DP> (or elliptical for that matter)? Any way to electrically adjust the down
DP> tilt? I am considering using soft copper tubing of ½” or 5/8” so it can
DP> be rolled up in a suit case and carefully straightened out on arrival.
DP> Any thoughts or suggestions would be welcome--other antenna types,
DP> calculation software, construction ideas, etc.

DP> Thanks,

DP> Dan Peek N4FAA
DP> Dan.peek at 3abn.org



-- 
Best regards,
 Elliott   N0UKF                      mailto:n0ukf at wiktel.com
www.qsl.net/n0ukf/