[Elecraft] Problem Tuning K3-" Balun"

[David Gilbert]

A common mode choke (not really a balun) at a point of high SWR can heat 
up and as it does so everything drifts, making tuning impossible.  Been 
there, done that using high power to a 160m Inverted-L that was close to 
resonant, but due to expediency was fed at a point of high SWR.  A 
relayout of the antenna to lower the SWR fixed everything using the same 
choke (which luckily hadn't been permanently damaged).

73,
Dave

> From: Bill via Elecraft
> Sent: Tuesday, November 2, 2021 6:15 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] Problem Tuning K3
>
> Jim,
> 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.
>
> Thanks,
> Bill - W0BBI