[TowerTalk] Choke on feed point of dipole

[Richard (Rick) Karlquist]

The trouble with this discussion is that it attempts to figure out the 
optimum way to elevate a vertical antenna, while ignoring the well 
established principle that elevating a vertical doesn't work very well 
in the first place, no matter what is done to feed it.  While elevating 
a horizontal dipole is well known to produce ground gain, the same 
cannot be said for a vertical dipole.  Something about the pseudo 
Brewster angle.

73, Rick N6RK

On 1/12/2026 12:37 PM, Jim Brown wrote:
> On 1/12/2026 10:46 AM, Tom Hellem wrote:
>> Any ideas?
> 
> This is a method I played with about ten years ago. It worked fine for 
> 100W. I've never tried with with higher power. I expect that multiple 
> chokes in series would be needed. That's easy to figure out -- the issue 
> would be heating of the choke(s) -- transmit for a while, then go out 
> and feel it. As long as you can leave fingers on the core, I wouldn't 
> worry about it.
> 
> http://k9yc.com/VerticalDipole.pdf
> 
> 73, Jim K9YC
> 
> 
> 
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