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

[Charles Plunk]

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


On 12/4/19 7:22 PM, David Eckhardt wrote:
> OK.  I confess I've never had a wire fall on me.  But there are better
> tools.  MFJ (I hate to admit) sells an ultrasonic microphone much like
> those used by professional power providers.  It is far better at locating
> problems than the walking battery-powered radio.  Arcs and coronal
> discharges produce copious amounts of acoustical energy above our hearing
> frequency limits as well as RF energy.  It's a wonderful tool.
>
> Dave - WØLEV
>
> On Thu, Dec 5, 2019 at 1:14 AM Michael Martin <mike at rfiservices.com> wrote:
>
>