On Wed, Oct 8, 2014 at 9:27 AM, Allen Mulvey wrote: > I have a very similar, but older, 3 gallon Whirlpool dehumidifier in my > basement which has no effect whatever on these radios. I have been playin= g > with electricity for more than 50 years and even studied some EE in colle= ge > but I can't see how a simple motor could so completely jam these radios f= rom > such a distance. Perhaps it used the power line as a radiator. I don't kn= ow. > Any ideas? The contacts of a brushed motor can function as a rather effective spark-gap transmitter. -p. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .