[RFI] Ultrasonic Line Noise Detectors

[Jimk8mr at aol.com]

In the May issue of CQ my eye caught an ad for  an Ultrasonic Receiver Kit 
(page  113):

http://www.midnightscience.com/ultrasonics.html

This appears  to be essentially the entire receiver portion of the W1TRC 
ultrasonic powerline  noise detector that was in QST a few years back.  I 
built the W1TRC device  and have found it useful for isolating power line noise. 
 

It seems  to me that remoting the ultrasonic transducer (microphone) out of 
this kit into  the parabolic dish of the W1TRC design would give you an 
complete ultrasonic  detector.

You may want to check these out.


73    -   Jim  K8MR