Plasma TV's, certainly are a noise source
![Neutral :|](./images/smilies/icon_neutral.gif)
Also found pool chlorinators to be a shocker, my old one used to generate interference on HF to VHF, had to set it to run at night.
Have a lap top and PC with the radios and don't suffer to badly with interference as a matter of fact my Winradio G303 sits inside my PC and my PCR-1500 plugs into the usb port, no problems.
Two other places I get interference from is from the ASDL router and power line insulators when they get dirty and moist.
In all, I'm getting pretty good reception considering I'm living in a built up area in the burbs.
A number of years ago I lived in Marrangaroo and the then ABC regional transmitters used to be that strong that the RF used to get into the mains and cause inter modulation on my receiver even with a short aerial. Put a monitor and an old computer into the equation and my hobby was destroyed. Gave up listening for many years.
Sol