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Re: Homemade stacked plate cap. *Need* a vacuum pump?
From: DamDeName-at-aol-dot-com[SMTP:DamDeName-at-aol-dot-com]
Sent: Saturday, November 01, 1997 3:57 AM
To: tesla-at-pupman-dot-com
Subject: Re: Homemade stacked plate cap. *Need* a vacuum pump?
Hi Adam,
A good vacuum pump can be made with an old refrigerator
compressor --- there are several good articles is Scientific American
--Amateur scientist --- with regard to these ----
Warm the oil moderately before adding to the cap.
A vacuum chamber does have to be better than
a rubber maid bucket (strength-wise )--- but it can be reinforced
---- consider -- wraping your cap in plastic (masking tape & light
cardboard ---etc. on the sharp edges of the glass ) to prevent
the plastic from being cut.allowing for an opening to the pump---
then packing the space between the cap & container with sand ---
--- a bit of eng./magic spit & "try it " & you can compress
the cap ,as you pump the container down
-- squeezing out the bubbles ---- (cycle it a few times )
any - way the method works --- just depends on
ones imagination ---
haveatit ---:>)
Sandy
In a message dated 97-10-31 00:06:44 EST, you write:
>From: Adam[SMTP:absmith-at-tiac-dot-net]
>Sent: Wednesday, October 29, 1997 8:26 PM
>To: tesla list
>Subject: Homemade stacked plate cap. *Need* a vacuum pump?
>
>
>
>OK, here's the dilemma: I have no vacuum pump, and I don't intend to
>buy
>one. Is this going to be a big problem? Is there a way do get the air
>
>bubbles out of the cap without one? According to my Electromagnetics
>Textbook, it would take 90,000V peak to punch through 90mil of
>polyethylene. Shouldn't I have enough of a saftey margin here that a
>little air bubble isn't going to break the thing? Also, wouldn't a
>vacuum
>pump just crush my rubbermaid box down and break the seal? This thing
>is
>going to have a good 2" of airspace above it when I'm done (I could
>not
>find a box shorter than 5").
>