[RFI] RFI Digest, Vol 115, Issue 23.....identification or rfi

[N1BUG]

I would like to see the photo of an ultrasonic RFI locator with 19" 
dish. I would also like to know where you got the dish. I have a 12" 
one and have thought about trying to go larger. The problem is 
finding a dish that is flat enough. The available 40 kHz transducers 
have about 50 degree directivity. That requires a very flat dish. I 
haven't been able to find any suitable candidates.

Paul