Re: [RFI] Noise changes when room lights turn on / off

[Tony <dxdx@optonline.net>]

On 9/13/2012 9:56 PM, Tim Duffy K3LR wrote:
> Hello Tony:Could your noise problem be related to a dusk to dawn light at your 
> home or
> a street light? Or a neighbors outdoor light (only on when it is dark)? 73,Tim 
> K3LR
Hi Tim:

That's what I thought until I saw the noise shift when I turned the 
light off in the shack. You can see what happens in the video:
http://www.youtube.com/watch?v=EYHbpLfQ1gc

The light is not the source of the noise because the noise continues 
with the light unplugged. There are no florescent lights or touch lamps 
in the house. I disconnected the only sensor lamp I have on the house 
today and the noise was still there.
I guess the question is: why would the noise shift in frequency when I 
turn a light switch on / off in my home if the noise is coming from an 
outside source like a street lamp or a neighbors porch light?
Puzzling Tim...

Thanks

Tony -K2MO


> -----Original Message-----
> From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Tony
> Sent: Thursday, September 13, 2012 7:20 PM
> To: Rfi List
> Subject: Re: [RFI] Noise changes when room lights turn on / off
>
> On 9/12/2012 1:33 AM, Jim Brown wrote:
> > This has the potential stink of one or more wiring errors INSIDE your
> > home.
> Jim...
>
> I setup the computer to monitor the noise 24 hours a day. It's been a
> few days now and it's only come on at night between 7:00PM and 7:30PM.
> There is no noise present during the day.
>
> Assuming it is a house wiring problem and not an appliance, what would
> cause it to come on in the evening and stay on till morning? Would
> temperature and humidity cause this?
>
> > Finally, make sure that there's REALLY a ground on the panel where
> > power comes to the building, and that it goes to something going to
> > the earth.  That's another thing that was wrong here. :)
> Good advice Jim. The house was built in 1984 and there is a ground rod
> attached to the panel. I'll check the connection tomorrow morning.
>
> Thanks
>
> Tony -K2MO
>
>
>
>
>
> If that is the case, what condition would make it so the noise only
> appears at night?
> > Look for all the simple dumb mistakes -- outlets wired with phase
> > (hot) and neutral reversed, or with ground (green) and neutral
> > reversed, light switches wired wrong, extra bond(s) between neutral
> > and ground (there must be one, and only one, and it must be in the
> > main panel). It's common for there to be extra bonds in laundry
> > appliances.  Look also for an appliance (or outlet, or even that
> > light) getting power between phase (hot) and Green, rather than
> > between phase and neutral.
> >
> > It's a rare building that doesn't have at least one of these problems.
> > The home I bought here in CA had all three.
> >
> > Finally, make sure that there's REALLY a ground on the panel where
> > power comes to the building, and that it goes to something going to
> > the earth.  That's another thing that was wrong here. :)
> >
> > 73, Jim K9YC
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi