Do you by chance have any lamp dimmers on that ckt? Dimable ceiling
lights for the kitchen maybe?
--
Thanks and 73's,
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On Mon, 2016-01-18 at 16:52 -0500, Gary Smith wrote:
> Hi,
>
> I need some ideas on how to track down some noise sources inside the
> house. I thought it would be just switching off breakers and then
> unplugging the electronics on that circuit till I find the one that
> has failed and deal with that. No, there's more to it that I just
> discovered.
>
> For some time I have been having noise on my HI-Z Triangular. It is
> NW of the house. A salt marsh sans anything electric from the S to
> almost N to the West of me. The least noise was N, toward AMTRAK 100'
> away and when I would turn the aiming direction clockwise, I would
> get more RFI until the maximum between the south and the NW. Also, My
> be3am located at the center of the roof identified much the same. I
> quit using the beam because the noise was too much. For the most
> part, the noise seemed to come from the direction of neighbors who
> are only to the SE & S of me.
>
> I asked my YL to watch my monitor, connected to the P3, as I flipped
> off breakers. On the 2nd flip she said the noise was gone. The only
> outlets I could find at fault are the overhead light in the hallway
> and one bank of wall plugs in the kitchen. Nothing in the kitchen
> when unplugged stops the interference. Somehow, something unknown
> that is attached to the circuit is causing this problem and I have to
> track that down.
>
> The attic was filled with that paper mache kind of blown insulation
> and all of the wires are covered. That will make finding and tracking
> the wire to the overhead light difficult, I have no markers to where
> to safely step. I can do it bit by bit of course but I just can't
> look and follow the wires. In the basement, there is a false ceiling
> that holds the wires and some of them are in an area very difficult
> to access.
>
> But the problem remains that when that one circuit is eliminated,
> most if not all the noise goes away and I find nothing attached in
> line except that one overhead light and it was not on when we did the
> test.
>
> It was brought to my attention that a defective doorbell transformer
> can cause major issues but the doorbell is not on the same circuit
> and though I looked for that transformer, it's not in the closet or
> anywhere else I can find. The electrician was a gem. Still, I'd like
> to check it out, it's had power on it since 1969.
>
> So how might I best localize a source of internal house RFI when
> nothing is plugged in? Is there something like a stud finder that
> will allow me to follow the path of wiring behind walls?
>
> Thanks & 73,
>
> Gary
> KA1J
>
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