> If the problem were emissions, the interference would be > very audible with the radio station off the air.
Just a rambling thought pattern ... I'm not sure I necessarily agree with this. If the radio carrier drops off, the front end stage and intermediate stages aren't carrying an rf signal through to the demodulation stages. If 60 Hz is indeed getting into the radio to the demodulation stage by way of radiation, it's not doing it through the front end or intermediate stages. Those filter stages wouldn't carry something as low as 60Hz. Therefore, you may very well hear nothing with no station carrier present. 60Hz most definitely will be heard if it's inductively effecting the radio if the station is broadcasting or if it's off. That I agree. And if the induction is sufficiently high, you may well hear the 60Hz through the speaker when the radio is even turned off. This is one of the ways which they used to sweep a room for listening devices. Regards, Doug McKean ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
