Ultrasonic Power Line Noise Pinpointer

http://www.arrl.org/files/file/Technology/PLN/Ultrasonic_Pinpointer.pdf

http://www.farcircuits.net/w1rtc_notes1.pdf

http://www.midnightscience.com/ultra-kits.html

http://nk7z.net/rfi-now/

https://www.youtube.com/watch?v=4i7KvNSpxVE

https://www.youtube.com/watch?v=fR6-IiMiqVM

https://www.youtube.com/watch?v=8Ukb2jjVgWM (***)

I'm thinking I may end up building something like this.  I'd like to add a camera to this device that is pin pointed at the focal point of the dish.  This way I can locate the source, and actually take a close up photo of it as well.

I think adding something like a BeagleBone Black with a hdtv camera device and the ability to record the audio from the electronics would be a nice addition to a device like this to help preserve what the device was looking at and what the noise sounded like at the time the test was conducted.

I was thinking about buying a device like the one noted in this article, but building one with the additional features I've been talking about here would be a fun and useful side project.