Hi Eric,
Using a simple PC based sound scope, the bursts of noise are indeed at a
frequency of 120 Hz, and looks just most of the power line arcing I have
tracked down over the years.
I will e-mail you a screen shot of scope capture.
73,
Don (wd8dsb)
On Fri, Dec 6, 2019 at 4:31 PM Eric Rosenberg <ericrosenberg.dc@gmail.com>
wrote:
> This may not have made it through the first time.
>
> --------------------------------------------
>
> My good friend Tm Shoppa, N3QE has run into a vexing RFI issue.
>
> He posed the following on the PVRC reflector, but is not on the RFI
> reflector.
>
> Please feel free to respond directly to Tim.
>
> Thanks & 73,
> Eric W3DQ
>
> ------ Forwarded Message ------
> From: "Tim Shoppa via PVRC"
> Sent: 12/6/2019 3:18:35 PM
> Subject: [PVRC] Help me identify my new RFI
>
> In the past week a brand new 24x7 noise source came out of nowhere.
> Clearly audible all over my neighborhood under every power line 540kHz -
> 1710kHz.
>
> Recording made on 1.8MHz with receiver in 2400Hz bandwidth AM:
> http://n3qe.org/n3qe-rfi.wav
>
> Heard in AM, this not simple 120Hz impulse noise but shows strong
> 800Hz-1200Hz audio component interrupted at 120Hz. Waveform picture of
> the above audio sample shown below (not attached).
>
> Any ideas?
>
> Tim N3QE
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>
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