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

[Cortland Richmond]

I notice a similar peaking or reducing effect when I turn on the OUTSIDE 
lights while using some (SCR controlled, switcher powered) track 
lighting.  This is due to changing the length of connected wiring that 
radiates when something is switched in, that's all. The total appearance 
and disappearance of the interference is convincing evidence for the 
source  being on a timer, and the times strongly suggest it's lighting 
of some sort.

Cortland
KA5S



On 9/13/2012 2214, Tony wrote:
> 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