On 9/13/2012 11:08 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
The timing Sounds like an Electric Blanket or Water Bed heater.
OTOH could be one of those battery chargers for a plug in hybrid.
The characteristics are those of a charger. Computer? Car? tablet?
73
Roger (K8RI)
- 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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