[Elecraft] KPA1500 in the IARU Contest Last weekend

[Jim Brown]

On 7/15/2020 11:46 AM, CUTTER DAVID via Elecraft wrote:
> Ferrite-cored chokes (balun) heat up and change apparent swr.

Not if they are properly designed and properly applied. And not all 
antennas can be choked -- in general, only resonant antennas can be 
effectively choked. Chokes applied to non-resonant and/or poorly 
balanced antennas (like OCF wires) are, in general, NOT effective, and 
WILL likely overheat.

I suggest a study of
k9yc.com/RFI-Ham.pdf and
http://k9yc.com/2018Cookbook.pdf

73, Jim K9YC