I could not resist, so I checked my relatively expensive Sears/Kenmore microwave oven. The results are there: http://www.ko4bb.com/Test_Equipment/Microwave_oven_leakage/
In one word, dismal. Almost 1W peak power leakage at 1 foot, and almost 100MHz occupied bandwidth. I looked with a crystal detector driving a scope, and it is obvious the unit is driven from a 60Hz transformer with half wave rectification, and has no filtering whatsoever, like the first Microwave oven I have ever opened (a 20 years old model long dead). Didier KO4BB > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Chuck Harris > Sent: Monday, January 18, 2010 8:28 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 4 KV Power Supply Recommendations > > As I understand it, the supplies are 100KHz, and have no > significant filtering at HV. They modulate the magnetron > with the 100KHz PWM mess. As long as the signal doesn't > leave the rather wide ISM band, they are under no obligation > to filter anything.... routers, etc. are squatters on the IMS > band, after all. > > I am sure that some brands are better than others, but then > some brands are only $50. > > I don't have any of the new ovens as yet... My old beaters > from the early '90s are still running strong. I have no > neighbors, so their choices are not an issue. > > -Chuck Harris > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
