[Antennas] J pole horizontally polarized antenna

Tue Jun 8 16:03:31 EDT 2004

Dan:
I would consider a circularly polarized antenna. This way, any receive 
antenna would have the right orientation, with only a 3 dB disadvantage. A 
Lindenblad would work, but I would think a turnstile would be better.
I have a 2 meter turnstile on one of my masts which I use for satellite 
work, and for terrestrial SSB. I made it from a Radio shack FM broadcast 
antenna. See if they still sell their FM version, and search for the 
modifications on Google.
Let me know if you need any additional ideas.
73, Mike kf4fdj
At 10:07 AM 6/8/2004, Dan Peek wrote:
>I have been asked to construct an antenna for a small community TV
>transmitter somewhere in Africa on our channel 7 (174-180MHz). The J
>pole or super J pole looks like a good candidate, but I believe it is
>vertically polarized. Is there any way to make it horizontally polarized
>(or elliptical for that matter)? Any way to electrically adjust the down
>tilt? I am considering using soft copper tubing of ½” or 5/8” so it can
>be rolled up in a suit case and carefully straightened out on arrival.
>Any thoughts or suggestions would be welcome--other antenna types,
>calculation software, construction ideas, etc.
>>Thanks,
>>Dan Peek N4FAA
>Dan.peek at 3abn.org
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