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

[Tony]

All:

Just an update on the noise:

Turned off all breakers in the house except for one that powers a single 
A/C outlet in the shack. The noise was still there. Friend has not come 
through with his battery powered HF rig so I might just by a small 12 
volt so I can run the rig with the main breaker turned off.

To recap:

- noise appears each night between 7PM and 8 PM.
- Continues intermittently until morning and is not heard during the day
- it sounds similar to line noise. It's wide-band about 30khz in width
- It appears every 120 kHz on several HF bands.
- noise shifts in frequency when shack light is turned on / off using 
house switch
- shack light is not the source of the noise. It's there with the light 
unplugged
- noise appears on a heading that is beaming away from my QTH

Noise video - http://www.youtube.com/watch?v=EYHbpLfQ1gc

Thanks,

Tony -K2MO




-

> > All:
> >
> > The noise that appeared this evening at 7:00pm may have something to 
> do with AC power coming into the house. I noticed that the noise 
> changed when I turned the shack light on and off. This video shows 
> what happens: http://www.youtube.com/watch?v=EYHbpLfQ1gc
> >
> > There are no florescent lights or touch lamps in the house. 
> Unplugging the shack light does not make the noise go away. Turning 
> the shack's light switch on or off with the light unplugged does not 
> change the noise. The noise persists with power supplies, computers 
> and TV's turned off or unplugged.
> >
> > I'll investigate further and report back tomorrow.
> >
> > Thanks,
> >
> > Tony -K2MO