Whats the deal, Mr. EMI wizard?
We’ll have to break the bad news to Sam gently, but let’s begin by establishing the fact that interference to telephones is not the fault of the transmitter. A quick quote from the FCC’s Interference Handbook should explain things clearly: “Telephones, stereos, computers, electronic organs and home intercom devices can receive interference from nearby radio transmitters. When this happens, the device improperly functions as a radio receiver. Proper shielding or filtering can eliminate such interference. ” The FCC doesn’t require that telephones include EMI protection and they don’t offer legal protection to users of telephones that are susceptible to interference. If you show this to Sam, he should realize that the interference is not caused by a problem on your end. Fig I pretty much sums up telephone interference at a glance! This doesn’t mean you should leave Sam on his own, though. You want to be on good terms with your neighbors; besides, maybe you’ll want to put up a tower someda
