[Elecraft] Problem Tuning K3

Jim Brown jim at audiosystemsgroup.com
Tue Nov 2 14:25:53 EDT 2021


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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