MM, I don't know why I didn't think of it before, but I've recommended this to someone else here. Sears carries a device that senses current draw and switches on plugged-in equipment. It is called the Craftsman Autoswitch, Sears part # 00924031000. It's normally used to switch on a shop vac when a saw or other tool is turned on.

The only concern is that the receiver alone doesn't draw enough current to activate the device, so you may need to plug a power strip into it, so more than just the receiver draws from the sensing outlet.

Larry
www.fineelectricco.com