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Re: [RFI] RFI on 20M

To: Doug Grant <dougk1dg@gmail.com>
Subject: Re: [RFI] RFI on 20M
From: Richard Battles <wb4byq@gmail.com>
Date: Thu, 3 Nov 2011 14:23:01 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
I once had a rfi problem like this and it turned out to be a very cheap
vcr/dvd player, the switching power supply was the problem and the rfi came
from a neighbors house.  cut the power on the main breaker off and then on
maybe the unit will turnoff until someone presses the on/off switch.


On Wed, Nov 2, 2011 at 4:43 PM, Doug Grant <dougk1dg@gmail.com> wrote:

> I have a strange case here.
> There's a broadband noise coming out of my neighbor's house that is fairly
> constant across most of the 20M band, but drops precipitously at about
> 14265. It is s5-6 below that frequency, and down to s1 at 14270.
> I have swept across the entire HF spectrum with a portable receiver and
> loop at the neighbor's house (it is a vacation house, and they aren't there
> much - I have not been inside), and there are no other significant noises.
> And since they aren't there, it has to be something like maybe a wall wart
> that radiates even when the equipment is off.
> There is no cable TV service in the area, and whatever the source, the
> noise is really loud at the power line entry. There is DSL in the area, but
> none of the other houses (including mine) seem to have this noise.
> So what can create a broadband crud that covers the whole 20M band, but
> drops like a rock at 14265? Has anyone seen such a signature?
> 73,
> Doug K1DG
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