[Antennas] J-Pole antennas

[David Ring]

Hello Clete,

I would very much like to see some information on the correct Zepp antenna,
both for historic interest and for my interest in antennas.

Could you find some - either on the Internet or from a book and send it to
me?  I'll put it up on the Internet for you.  If it is in a book (not under
copyright) and you don't have a scanner, photocopy it to me and send it to
me.

73

DR

David Ring, N1EA
-30-

On Sat, Nov 28, 2009 at 6:21 AM, C.Whitaker <whitaker at pa.net> wrote:

> de WB2CPN
> Well, I said there could be some strong opinions
> about this, but one has to see that the J-Poles that
> are shorted at the bottom are fed a small distance
> up from the bottom, and require a balanced feed
> because the J-Pole is balanced at that point.   Being
> as coax is an unbalanced thing, arrangements must
> be made to conect the unbalanced coax into a balanced
> J-Pole quarter wave section.  It could require a Balanced-
> To-Unbalanced transformer, but how does one build a
> balun that will physically fit in or on the J-Pole? The military
> J-Pole I have here (WWII) does not have the bottom
> shorted.  The coax shield connects to the long element,
> and the center conductor connects to the short element.
> We're thinking 75 Ohm coax here.
> 73  Clete
>
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