Hallo! You should take a look at: http://www.arrl.org/tis/info/HTML/plc/ http://www.qsl.net/rsgb_emc/ http://www.darc.de/referate/emv/plc/ etc. and then do every thing you can to prevent the use of power line in MF/HF/VHF range. vy 73 de toby -- DJ7MGQ