So by now, RC regulars should know our house is haunted with phantom RF signals. Our ceiling fan turns on by itself. Wi-Fi barely goes 35 feet ...

Here's a strange one. I have had three different cell phones on two different services (AT&T and Verizon) and they all cut out at a certain area over my desk -- an area of maybe 2x2 feet.

(NO, haven't gone through with spectrum analyzer but need to do that.)

OK ... go.