[TowerTalk] Balun for C3

[Jim Brown]

On 12/29/2022 6:55 AM, tony.kaz--- via TowerTalk wrote:
>   My question, how are folks mounting toroid style baluns on the C3?  Hanging it below the feedpoint?

That's a very good method, provided that sufficient strain relief and 
structural support is provided. In general, my advice has always been to 
use whatever "balun" the mfr provides and add my choke on the coax side 
of it.

K0SN said:
 >   and place it in a plastic NEMA box.

This can be problematic if the enclosure is not ventilated -- a choke 
that is doing anything useful will generate some heat, which must be 
dissipated. See NA6O's solution, in the Cookbook. FWIW, in the nearly 15 
years since publishing the first version of the cookbook, I've never 
received a report of cores cracking from freeze/thaw cycling.

It's also critical that the choke not be de-tuned by taping the coax on 
both sides to the boom.

73, Jim K9YC