[RFI] Fwd: Re: Safety suggestion to consider when trying to locate new it is generated by parent company hardware

[Charles Plunk]

Oh, a tip if you do use a portable AM broadcast radio. Wrap some 
aluminum foil around the radio. Then you can slide that up or down the 
radio to use as an attenuator to tell when you get close to the right 
pole. But I have found that tricky at best when in a old neighborhood 
like mine where maybe many poles are emitting some rfi at AM broadcast 
but may not be bothering ham bands. A better solution is a portable 
communications receiver with AM mode and some VHF yagis at various 
frequencies. Power line rfi diminishes with increased frequency thus you 
can use that to your advantage to narrow it down to the right pole. Keep 
in mind also the blame arc can use the lines as an antenna to throw you 
off further. Its an art to where I am still a novice. I pay attention to 
every word Mike Martin says.



-------- Forwarded Message --------
Subject: 	Re: [RFI] Safety suggestion to consider when trying to locate 
new it is generated by parent company hardware
Date: 	Wed, 4 Dec 2019 19:44:26 -0600
From: 	Charles Plunk <af4o at twc.com>
To: 	rfi at contesting.com



Years ago, I built the ultrasonic from the QST article 
(http://www.farcircuits.net/w1rtc_notes1.pdf). Works good unless the 
source is masked by the hardware. I have found it is very pinpoint in 
nature. You have to find the pole by df'ing then use the ultrasonic to 
scan the pole for individual hardware. I df with either an FT60 or FT817 
on AM and various hombrew yagi's. Of course AM broadcast in the SUV for 
very broad location. My current source pulsed at first, very 
distinctive, and I could pick it up almost a mile radius on car AM 
radio! One source, years ago, I could hear it with the ultrasonic and 
took a photo of the individual hardware & pole number. Then emailed it 
to my contact at the utility. That was neat.

My current source, I have been unable to hear it with the ultrasonic. 
Since the pole I suspect by df is scheduled for replacement anyway, have 
hung up my tools until then.

Chuck
AF4O