Re: KPA1500 in the IARU Contest Last weekend

Posted by Jim Brown-10 on Jul 15, 2020; 8:07pm
URL: http://elecraft.85.s1.nabble.com/KPA1500-in-the-IARU-Contest-Last-weekend-tp7663146p7663160.html

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
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