[RFI] Introduction - power line noise

N1BUG paul at n1bug.com
Mon Jun 25 04:14:18 PDT 2012

On 06/24/2012 07:48 PM, KD7JYK DM09 wrote:
>> "I am all too often identifying adjacent pairs of poles as "noisy". This
>> doesn't feel right to me.
> Try more attenuation.  I have noted the same problem and can increase the
> attenaution in my system to where I have to be within 1" (one) of the ground
> wire of an offending pole to hear the noise generated by equipment on top.

Interesting, Kurt.

Oddly this is happening even on weaker noises that only move the 
MFJ-856 meter to half scale or less.

I was fully expecting to find noise radiating from ground and guy 
wires! But so far I always get more noise when pointing toward the 
stuff on top of a pole than when holding the antenna nearly touching 
a ground or guy wire. With some of the really strong noises I can't 
determine this, and in those cases I probably do need more attenuation.


More information about the RFI mailing list