Topband: Topband QRN

[La2rz]

Steve,
I had a simular problem some years back when working on 80 / 40 meters! this coincided with my neighbour buying a new
TV set, a Panasonic 29" 100hz. Strong birdies (59+) and some wide band noise also related.
After consulting with another ham who is a TV repair guy we found that the TV antenna coax was re-radiating. I popped on a large amount of div. ferrites from my junk box ( inner dia just over coax) about 60cms or so, this did the trick!
I did not check out 160 meters as this band was not of interest to me then but maybe there's noise on it. Would be a good idea to try this out on the power cord as well while your'e about it.
 73's  Dave  LA2RZ



----- Original Message ----- 
From: "Steve McDonald" <jsm at gulfislands.com>
To: <>
Sent: Tuesday, September 30, 2003 6:46 AM
Subject: Topband: Topband QRN


> 
> An annoying topband QRN problem for the past 2 months has finally been
> traced to a neighbor's TV switching supply. It appears that the QRN source
> is being radiated out and along the common powerline into the street where
> the noise is  e-probed and re-radiated by my 50' tower. My receive loop
> couples into the field radiated by the tower all too effectively!
> Is it possible to choke the QRN at the TV power cord? Would a large ferrite
> J core wrapped with as many turns of the power cord be effective in
> eliminating or attenuating this signal at its source?
> 
> Any hints appreciated.
> 
> Steve / VE7SL
> 
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