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[RFI] My Ultrasonic Parabolic Reflector Receiver System Build and Websit

To: RFI <rfi@contesting.com>
Subject: [RFI] My Ultrasonic Parabolic Reflector Receiver System Build and Website
From: Don Kirk via RFI <rfi@contesting.com>
Reply-to: Don Kirk <wd8dsb@gmail.com>
Date: Wed, 25 Mar 2026 16:42:36 -0400
List-post: <mailto:rfi@contesting.com>
I finally decided it was time to add the one missing tool I had from my RFI
detection/direction finding toolbox so I undertook the building of my own
ultrasonic parabolic dish receiver system for detecting arcing on power
line hardware based on the W1TRC design that was in the April 2006 issue of
QST.  Unfortunately Jim (W1TRC is an SK).

I know this tool has been discussed many times over the years on the RFI
reflector but thought I would share my recent build information with the
group as it might be helpful to those currently wanting to build one, and I
also think I kept my build very simple.

I had a lot of assistance from Charles (N0TT) and I also picked up a lot of
great information from Jeff (W4DD) and Frank (K7SFN).

Here is the link to my simple website that I created today for those
interested in my build:
https://sites.google.com/view/ultrasoundarcdetector/home

73,
Don (wd8dsb)
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