[Elecraft] Hum on 15 Meters CW

[WD0ECO]

Don,

What's odd is that when I cam back into the shack after reading your email
and turning the K3 back on, no hum!!!  

I turned the K3 on and off before reporting the issue but the hum was still
there.  Now it is gone - for now anyway.   

Well, I'll see if it returns.

Thanks.

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