RFI and PLI info on Engineering Tech Tips forum

[kenglish]

I put a couple of items on the other forum, which might be of interest to DXers:

Here's one on an Ultrasonic Receiver, with a new addition (a dish) for chasing Power-Line Noise (PLI), when it has an acoustic component, something that happens a lot with lightning arrestors and transformers:

http://boards.radio-info.com/smf/index.php?topic=169114.0

Here's a good RFI tutorial:

http://boards.radio-info.com/smf/index.php?topic=168908.0