Thanks for the replies. I'm now happy that an incidental radiator doesn't need Verification.
But now I'm confused as to whether and audio amplifier is an incidental or unintentional radiator. As the amp does not intentionally generate energy over 9kHz (it merely processes it) would it not be an incidental radiator? Regards Chris Colgan From: Cortland Richmond [mailto:[email protected]] Sent: 01 October 2003 22:05 To: [email protected]; ieee pstc list Subject: RE: FCC part 15 verification Richard Woods wrote: >> An audio amplifier that processes signals over 9 kHz is considered to be an "unintentional radiator" and must be verifified. << I don't believe I've heard of the FCC actually requiring analog audio gear to be verified, though even a cheap record player with 10 KHz audio does fall under the definition (uses >9KHz signals) of an unintentional radiator. What the heck, a _crystal radio_ falls under that definition. However, here's an interesting look at the REALLY OLD days: "... we had a two hundred kilowatt Federal arc that was a Poulsen arc operated on DC, together with a 3300 foot self-supporting steel tower and an antenna stretched between three towers. In those days we spoke in terms of meters, but the wavelength in kilocycles was somewhere between fifteen and twenty kilocycles. If I am correct, I remember we could hear the similar installation at Panama without rectifying the signal, those of us who had good hearing. I mean it came out as an audio signal. ..." http://www.ieee.org/organizations/history_center/oral_histories/transcripts /stone9.html Cortland 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] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
