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.
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 <firstname.lastname@example.org> wrote:
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