On 4/10/2022 1:21 PM, Rich Lim via Elecraft wrote:
The S meter jumps all over th place even without an antenna attached.
K3 and FTDX10 simultaneous
Sounds like you have a serious grounding and bonding problem.
Study N0AX's ARRL Book on the topic, to which I contributed, and/or
these tutorial slides.
http://k9yc.com/GroundingAndAudio.pdf
73, Jim K9YC
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