So the preamp is inside the house?
My question is whether the RF is getting into the preamp by common mode
(outside of the coax) or differential mode (picked up by the antenna and sent
down the inside of the coax).
I'm making a guess of common mode. Try wrapping the coax around a
torroid(s), or use the shield breaking back to back transformers I described.
73 - Jim K8MR
In a message dated 7/3/2008 11:38:25 A.M. Eastern Standard Time,
It is only getting in via the TV coax.
Our home is all-steel, walls and roof, so there
is nearly zero chance I am getting into the amp
any other way - indeed when I disconnect the antenna
feedline and keep the amp on there is no interference.
It really appears that I need a 6M trap in the
feedline from the TV antenna to the amp.
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