I'm glad you found the cause and a fix.
I'll add that, in my experience, 40M is always the most problematic band
for causing RFI problems. In a vehicle or home, it seems that a LOT of
'stuff' is sensitive to 40M. 160M comes in second for that status.
73,
Rick nk7i
On 11/21/2023 2:55 PM, Andy Durbin wrote:
"I should be able to fix the problem with better decoupling and/or choking of the
breakout box connections."
Problem fixed by adding a 0.01 disc ceramic caps on each of the 4 RCA keyline
jacks on the breakout box. I should have included them when I built it.
Interesting problem though and all sorts of nasty possible causes gave way to a
very simple one.
Why didn't I see this problem earlier?
My log shows I have only been on 40 m twice in the last two years. A year ago
I had a new roof mounted heat pump installed. The antenna runs near ducting
that was changed and the installers broke one antenna support that I have not
repaired. My attic is a hostile work environment and best avoided if possible.
73,
Andy, k3wyc
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