Yes, this hit me between the eyes as well. The K3 has Pin One Problems
at many (most?) connectors, so RF current flowing on shields of cables
plugged into those connectors will couple into the K3. I've been
preaching to Wayne about Pin One Problems since 2004, when we met in
Dayton.
If the problem is around 90 MHz, I'd use multiple one-turn and two turn
chokes with #43 material on every cable except the SO239 output, which
IS actually bonded to the chassis. Also choke the power cable.
73, Jim K9YC
On Wed,2/10/2016 2:53 PM, Fred Jensen wrote:
I easily could have misread the original emailed problem, but he
included the note that this RFI occurred with all antennas [and I
guess other cables] disconnected which is very strange indeed. If
that is so, then I doubt stubs/filters on the antenna circuits would
cure the problem.
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