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Re: [RFI] Fwd: Re: Help finding a source

To: Charles Plunk <af4o@twc.com>, Rfi List <rfi@contesting.com>
Subject: Re: [RFI] Fwd: Re: Help finding a source
From: "chuck.gooden" <chuck.gooden@comcast.net>
Date: Wed, 04 Dec 2019 19:12:32 -0600
List-post: <mailto:rfi@contesting.com>
If it is powerline issue, I would turn off the main breaker with your radio on 
a battery to verify the issue is not in your house before you find out the hard 
way when the fire trucks arrive.
-------- Original message --------From: Charles Plunk <af4o@twc.com> Date: 
12/4/19  6:58 PM  (GMT-06:00) To: Rfi List <rfi@contesting.com> Subject: [RFI] 
Fwd: Re:  Help finding a source I agree, just sounds like power line arcing. 
Heaven knows I have heard my share of it.ChuckAF4OOn 12/4/19 6:01 PM, David 
Eckhardt wrote:> Try again:>> In your third image, the audio spectrum, the 
groups (first peak of first> group to first peak of next group) is 17.5 ms.> 
deleted image...........> The period on one cycle at 60 Hz is 16.67 ms. Very 
close. The sound clip> also sounds suspiciously like 60 Hz discharge from the 
power distribution> somewhere in your vicinity. I usually detect this at 120 Hz 
as the> discharge occurs at both the + and - peaks of the sine wave. But not 
in> this case. In the time domain, I also usually detect an exponentially> 
decaying envelope for each discharge. No so in this case. But,> considering the 
period and sound, I'd guess its due to power distribution> discharge in you 
area. Walk the power lines with your battery-powered> radio. When you find a 
pole that is particularly, kick the pole hard and> observe any change in the 
character of the sound on your radio. If no> change, its not at that pole. 
Continue searching. Also, damp weather> usually exacerbates the discharges as 
does dusty conditions.>> Dave - WØLEV>> On Thu, Dec 5, 2019 at 12:00 AM David 
Eckhardt <davearea51a@gmail.com>> 
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