The noise interferance usually comes from dimmer switches. They reek havoc on wireless systems including wireless phones and intercoms (both of which I have in a room with a dimmer switch).
Which is why I'm changing my swtiches to regular on/off switches.
__________________
Sponsored by: KAM Racing Sports, Falken Tires, Progress Technology, Brady's High Performance, Taggart Performance Engineering, Rotora Brakes
Autocross is: 90% driver, 5% car, & 5%
CRAZY MOJO!
Autocross Help Page