Several years ago I went to warm up some peanut butter I kept in the fridge so that it would spread easier. I had not noticed or forgotten that the (metallized) security wrap underneath the plastic lid had not completely detached from the jar lip. I got a spectacular light show right through the opaque plastic lid. Potentials induced on the remnant metal strips were high enough to arc over...
---------- >From: umbdenst...@sensormatic.com >To: emc-p...@ieee.org >Subject: RE: 2. 4 GHz cordless telephone, question of general interest >Date: Mon, Apr 23, 2001, 9:49 AM > > > I once warmed up some leftover take-out Chinese food in the take-out > containers with the metal handle. The laws of physics worked -- the handle > burned the container. > > Water is apparently resonant at 2450 MHz, but metal also reacts to EM waves. > Your dishes may have metallic compounds in the glazes or substrate. This > will definitely warm up the "fajita platter". :-) > > Don Umbdenstock > > >> ---------- >> From: Ken Javor[SMTP:ken.ja...@emccompliance.com] >> Reply To: Ken Javor >> Sent: Monday, April 23, 2001 9:50 AM >> To: dinst...@uk.xyratex.com >> Cc: emc-p...@ieee.org >> Subject: Re: 2. 4 GHz cordless telephone, question of general >> interest >> >> >> Microwave safe dishes do not heat if put in an oven without food on them >> to >> heat by conduction; "melmac" cannot be pt in a microwave because it does >> absorb - I don't know what's in melmac but it must have some water content >> that does absorb energy. Maybe the same goes for your pottery. It's >> REALLY >> hazy, chemistry was one of my worst subjects, but some compounds have a >> structure where they are bound to H2O molecules as in CaCO3*H2O (I just >> made >> up that combination for illustration). Such a compound could be >> completely >> "dry" but still retain H2O content. This is purely supposition on my >> part. >> >> ---------- >> >From: david_inst...@uk.xyratex.com (David Instone) >> >To: Ken Javor <ken.ja...@emccompliance.com> >> >Cc: emc-p...@ieee.org >> >Subject: Re: 2. 4 GHz cordless telephone, question of general interest >> >Date: Mon, Apr 23, 2001, 3:05 AM >> > >> >> > Ken Javor wrote: >> >> >> >> Just goes to show you can find anything on the net. I have measured >> leakage >> >> from microwave ovens and every one was at 2450 MHz. And that IS a >> resonant >> >> frequency for water and water alone. That's why you can put waterless >> items >> >> in and they won't heat up, >> > >> > Hm, now I wonder how the the totally dry and empty pottery plate I put >> > in the microwave to heat (before I put my non microwave cooked food on >> > it) gets too hot to hold after just 60 seconds at 650W. >> > >> > >> >> and also why you should never run a microwave >> >> oven without a water load: with no load you get high vswr and the >> magnetron >> >> can be damaged by reflected energy. >> > -- >> > Regards >> > >> > Dave Instone. Compliance Engineer >> > Storage Systems Development, MP24/22 >> > Xyratex, Langstone Rd., Havant, Hampshire, P09 1SA, UK. >> > Tel: +44 (0)23-92-496862 (direct line) >> > Fax: +44 (0)23-92-496014 >> > http://www.xyratex.com Tel: +44 (0)23-92-496000 >> > >> >> ------------------------------------------- >> 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: >> majord...@ieee.org >> with the single line: >> unsubscribe emc-pstc >> >> For help, send mail to the list administrators: >> Michael Garretson: pstc_ad...@garretson.org >> Dave Heald davehe...@mediaone.net >> >> For policy questions, send mail to: >> Richard Nute: ri...@ieee.org >> Jim Bacher: j.bac...@ieee.org >> >> All emc-pstc postings are archived and searchable on the web at: >> http://www.rcic.com/ click on "Virtual Conference Hall," >> > > ------------------------------------------- > 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: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson: pstc_ad...@garretson.org > Dave Heald davehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," > ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
