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

[Gary K9GS]

What kind of light are we talking about?  What kind of bulb?


On 9/13/2012 10:08 PM, Tony wrote:
> 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
>
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>

-- 


73,

Gary K9GS

Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032   http://www.cwops.org

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