[TowerTalk] Feedline (choke) question

[Jim Brown]

On 9/27/2025 1:35 PM, John Keating wrote:
> On a related topic, I'm getting ready to put a Mosely PRO67-C-3 on a 
> tower. The instructions call for a coax choke, 10 turns of RG213 in a 
> 10" diameter, taped to the boom, and within 3-6" of the choke, split the 
> coax and wire directly to the phasing lines on the two driven elements.

Hi John,

Matching the antenna to the feedline is part of the design of many 
Yagis. My advice has always been to use what the antenna mfr advises for 
matching, then add one of my chokes between that coil and the feedline. 
We add the more serious choke to prevent feedline pickup from adding 
noise and filling in the nulls.

73, Jim K9YC