[TowerTalk] Choke on feed point of dipole

[Jim Brown]

On 1/12/2026 5:23 PM, Jeff Blaine wrote:
> Tom, I'm emphasizing what Jim mentioned earlier.  If the antenna 
> resonant point moved by adding the choke, then that means the feedline 
> was participating to some extent as "part of the antenna."

Yes, but in Tom's configuration, even with the world's greatest choke, 
the feedline can still be a parasitic element.
> 
> My belief is that without a feedline choke, you simply cannot guarantee 
> that the feedline will not participate.  So every antenna here (19 of 
> them) has a feedline choke of some form.

Yes. And feedline chokes also reduce interstation interference, whether 
SO2R or multi.

73, Jim K9YC