[RFI] New to list...

Dave Cole dave at nk7z.net
Wed Apr 6 20:39:59 PDT 2011


Thanks for the info!  I purchased a nice little SW rig tonight, with
the extendo antenna...  I needed a portable SW rig anyway, and it does
SSB to boot.  Anyway, I hear not a thing below about 6.5 MHz...
Whatever this is it is very odd...  On most of the time, See graph on
web page of S meter vs signal strength, and very very broadband, just a
spray of RF sitting at S9 or better...  

Would you expect that the vertical would re-radiate the signal?  When
I get near the vertical with the portable, the level goes way up.  If I
short the connector at the base of the antenna it goes away.  I know it
is not anything I have going, I killed power to the house, and it keeps
right on...  It has totally destroyed my 40 Meter DX every
morning...  I can't even hear the JAs.  USed to be able to work the VK


On Wed, 6 Apr 2011 22:15:05 -0400
"Larry Parker" <ve3edy at cogeco.ca> wrote:

> Hi Dave,
> My vertical antenna situation is similar to yours,my antenna was
> about 150 feet from the house and on 80m the signal was +40 db  with
> peaks approx every 20khz. 
> This repetiton continued below the broadcast band getting stronger as
> I came closer to the fundamental frequency.
> My receiver stopped at 30khz so I couldn't hear the primary
> frequency , but the harmonics were a big clue once I put things
> together, such as the times the noise was present.
> The time periods were mainly when around the dinner hours and  after
> dark until 11 pm.
> This led me to believe it was either lighting or an entertainment
> device such as a TV. My weakness at first was , I did not  include
> myself as a possible source of the RFI. A portable AM radio tuned to
> the high end of the broadcast band above 1700 khz. was all I needed
> to find the source with a very short antenna. Good Luck

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