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FW: Homemade speaker shaker
From: David Knaack[SMTP:dknaack-at-rdtech-dot-com]
Sent: Monday, November 03, 1997 7:18 PM
To: Tesla List
Subject: Re: Homemade stacked plate cap. *Need* a vacuum pump?
-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: 'Tesla List' <tesla-at-poodle.pupman-dot-com>
Date: Sunday, November 02, 1997 11:52 PM
Subject: Re: Homemade stacked plate cap. *Need* a vacuum pump?
>From: Alfred A. Skrocki[SMTP:alfred.skrocki-at-cybernetworking-dot-com]
>Sent: Sunday, November 02, 1997 1:20 AM
>To: Tesla List
>Subject: Re: Homemade stacked plate cap. *Need* a vacuum pump?
>
>On Wednesday, October 29, 1997 8:26 PM Adam
>[SMTP:absmith-at-tiac-dot-net] wrote;
>
>Adam, unless you've already purchased the polyethylene, you may want to
>look into plexiglass as a dialectric - it has double the dielectric
>strength and a dielectric constant of slightly over 3, the big deciding
>factor would be it's power factor - if it is greater than that of
>polyethylene then it's a looser otherwise it may be cheaper and make a
more
>compact capacitor.
Doesn't plexiglass have high RF losses? I don't recall for sure.
>> OK, here's the dilemma: I have no vacuum pump, and I don't intend to
buy
>> one.
>
>A good source for a vacuum pump is to wait untill a neighbor throws out
>a refrigerator or an airconditioner and cut the two 1/4 inch copper pipes
>on it an remove all the motor electronics ie. compressor, starter
>capacitor, thermal switch and power cord.
Just don't let the police see you do it, venting freon into the atmosphere
is usually grounds for a substantial fine. :)
later
DK