On 11/2/2021 6:15 AM, Bill via Elecraft wrote:
I assume your using a balun with your
OFC antenna. I had a similar problem with my OCF that turned out to be the
balun. It was fine under low power but would not tune under high power.
NO! The problem was that by their nature, OCF antennas are BADLY
unbalanced, placing very high stress on a common mode choke, so are
likely to fry ANY common mode choke that does anything useful.
Study k9yc.com/RFI-Ham.pdf
AND -- erase the word "balun" from your vocabulary. It is used to
describe almost a dozen very different things, obscuring understanding
of how things work.
73, Jim K9YC
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