Oh, it might work. I figure there is a difference between sealing mica inside a dipped epoxy [whatever] casing and compressing a thin mica sheet "mechanically" between 2 pieces of metal using a screw & lock washer, and then subjecting it to a summer's long worth of vibration on a lawnmower. Hit a rock, bend the blade a tad, even more vibration. Newer lawnmowers are of course "laser-balanced" for minimal vibration at the factory [ ;-) ]. I remember an old one my father had where my arms would be vibrating after spending an hour cutting the grass. At 10:50 AM 8/29/01 -0500, you wrote: >Doh! > >How about 'dipped silver-mica' capacitors! > >Also the 'open' style micas - the higher power >low series-inductance xmit styles! > >Mica compression-trimmers! > >Doh! > >(It's all coming back now ...) > >Jim > >----- Original Message ----- >From: "Spehro Pefhany" >To: >Sent: Wednesday, August 29, 2001 10:41 AM >Subject: Re: [OT]: How to heatsink a lot of power electronics? > > >> At 10:26 AM 8/29/01 -0500, you wrote: >> >Roman - I distinctly remember what I believe to >> >be Mica insulators (best described appearance-wise >> >as simply 'clear and glistening' ) used in such common >> >household products as toaters ... Have you seen that >> >as well? >> >> There's a kind of mica that is (was?) used in lamp shades >> and I think it meets that description. The stuff used in >> toasters these days is brown and flakes, IIRC. >> >> It's used in large quantities in heaters (mica band >> heaters) and it is probably still used in China and >> Russia in their electron tube production lines . >> >> Best regards, -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu