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Re: [RFI] 6M Getting into TV Channel 3 - CLARIFIED!

To: doc@kd4e.com
Subject: Re: [RFI] 6M Getting into TV Channel 3 - CLARIFIED!
From: Jimk8mr@aol.com
Date: Thu, 3 Jul 2008 11:44:20 EDT
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
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,  
doc@kd4e.com writes:

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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