[Antennas] J pole horizontally polarized antenna

NA4FM (Buck) na4fm-list at towncorp.net
Thu Jun 10 02:37:09 EDT 2004


Just fold the 1/2 wave vertical element horizontal and leave the 1/4
wave matching stub vertical, or lay the antenna horizontal.  I have
considered cophasing two j-poles horizontal to see how that works.

Buck
na4fm

> -----Original Message-----
> From: Dan Peek [mailto:dan.peek at 3abn.org] 
> Sent: Tuesday, June 08, 2004 10:07 AM
> To: antennas at mailman.qth.net
> Subject: [Antennas] J pole horizontally polarized antenna
> 
> 
> 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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