[Wswss] Re: [PNWVHFS] j-pole antennas---feed point question

Edward Cole kl7uw at acsalaska.net
Sat Dec 27 00:07:29 EST 2008


I forgot to give the link to my J-Pole:
http://www.kl7uw.com/J-Pole.htm

Ed - KL7UW

At 06:26 PM 12/26/2008, Len Gwinn wrote:
>QUESTION  from  WA6KLK
>
>In building a few copper j-poles for a few friends for the fm 
>bands,  I have a VERY confusing point.
>
>Some of the schematics show the center conductor of the coax to the 
>short leg of the j,  others show it to the long leg of the j.
>
>Why the difference ??    Does it make any difference  ??
>
>I can build them but now am  a bit confused for the feed due to the 
>many many  designs of feed, ie, which conductor to which leg of the 
>j.  I have done both and not really noted a difference but why ???
>
>Common thinking by a couple of folks here is that the center 
>connector should be to the short leg, ie, like the feed of a gamma 
>match or shuch on a beam.    ----    Then again, a couple say feed 
>the center conductor to the long leg as that is the "hot" leg and 
>"more" metal in the air.
>
>Thanks and any other information as to why would be appreciated  !!
>
>Thanks !!!
>
>73  Len  WA6KLK
>
>
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