Tony,
It could be anything.
I myself a few years ago had a random sporadic noise, a crackling and very
strong especially on the lower bands, 80 meters. One day I had the receiver
volume turned up so I could hear it in another room and while I was walking
though the kitchen I heard the crackle crackle while I walked. I went to the
basement and started looking all around. What I found was the metal wire that
is used to hang suspended ceiling tile was barely touching a metal electrical
conduit above the tile and any amount of vibration would cause that static in
the radio.
Anyway that's my little story. I hope you can find it quickly.
73
Dale, k9vuj
On 13, Sep 2012, at 2:07, Tony <dxdx@optonline.net> wrote:
> All:
>
> Thanks for all the great advice. A local offered to stop by and lend me his
> battery powered FT-817 to sniff out the noise. The plan is cut the power and
> turn on each breaker one by one. That should isolate the source of the noise
> and the rig should help find it. The odd thing about the noise is that it
> only comes on in the evening. I monitored the HF rig over several days,
> throughout the day and it was very quite. There must be something in the
> house that's on a timer that I'm unaware of.
>
> As I mentioned yesterday, the noise changes when I turn the shack light on
> and off (see post with video below) which would indicate that there's
> something going on with the house wiring or possibly some device.
>
> I seem to remember hearing about an RFI case where the noise was coming in
> from the power lines onto the AC in the house. Has anyone experience this
> sort of thing?
>
> Thank you all.
>
> I'll report back as soon as I get the portable rig.
>
> 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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