[Prev][Next][Index][Thread]
Cap Material
From: djQuecke[SMTP:djQuecke-at-worldnet.att-dot-net]
Sent: Tuesday, November 25, 1997 11:31 PM
To: Tesla List
Subject: Cap Material
Anyone familiar with "ALPOLIC". (Try www.alpolic-dot-com) I have found some
good scraps that will allow cutting it into 11" x 11" plates for use in a
cap. The scraps I found are a core of 3/16" Polyethylene with a sheet of
approx. .025" aluminum bonded to each side.
I've just started my first coil and believe it will need capacitor(s) for a
.005uf value. When I figure the numbers on this material I come up with
16-17 plates -at- 11" x 11". I also figure with poly that thick, voltage
rating is around 110kV to 220kV (dc) depending on whose numbers you use. Do
these numbers seem ballpark?
The only hitch is that the ALPOLIC has an anti-static paint/coating called
"MEGAFLON". It seems to sand off fairly well though. I then need to
connect the plates and I've never had luck soldering aluminum so I'm
thinking of the following (apologies for bad ASCII art):
___ _____ ___ ___ _____ ___ ___ _____ ___ ___ _____ ___
| | | | | | | | | | | | | | | |
| A | E | A | | A | E | A | | A | E | A | | A | E | A |
| | | | | | | | | | | | | | | | _
__|_ _|_ _ _|_ _|__|_ _|_ _ _|_ _|__|_ _|_ _ _|_ _|__|_ _|_ _ _|_ _|_|
|_
In | | | | | | | | | | | | | | | | | | |
|
|__|_ _|_____|___|W1|___|_____|___|W2|___|_____|___|W1|___|_____|___|_|
|_|
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
__|_ _|_ _ _|_ _|__|_ _|_ _ _|_ _|__|_ _|_ _ _|_ _|__|_ _|_ _ _|_ _|_|
|_
Out| | | | | | | | | | | | | | | | | | |
|
|__|_ _|_ _ _|_ _|W2|_ _|_ _ _|_ _|W1|_ _|_ _ _|_ _|W2|_ _|_ _ _|_ _|_|
|_|
| | | | | | | | | | | | | | | | |_|
| | | | | | | | | | | | | | | |
| A | E | A | | A | E | A | | A | E | A | | A | E | A |
|___|_____|___| |___|_____|___| |___|_____|___| |___|_____|___|
I'll run four rods thru all the sheets and bolt as a block. I'll use 3/8"
rod and drill 1" holes for rods to slide thru. W1 will be an insulator
washer to insulate rod from aluminum and center it in 1" holes. W2 will be
1 1/2" aluminum jumper washer to make circuit. 2 of the four rods will be
totaly insulated and the other two rods will alternate insulator/jumper from
plate to plate. This results in small gap between aluminum sheets.
Is this at all right/possible??
If so....
Can the plates be jumpered in this manner?
Can I then leave the paint/coating on and just sand where jumper washers
make contact?
16 plates, in this configuration are only 4" high when stacked. Would I be
better off splitting this into four caps hooked in series?
Will I need to place all in oil bath or will the air in gaps between sheets
just add to capacitance?
What material should I seek for rods? Aluminum?
I have no idea what "MEGAFLON" is. How will this anti-static coating affect
circuitry?
A sheet of this stuff is basically a cap in and of itself is it not?
How in the hell do they then use this material as paneling in skyscraper
construction? Suppose the janitor started hooking panels together and when
no one was looking, wrapped a primary and secondary around the 'scraper next
store? Anyone seen a deal on high voltage cable, say enough to run from
Niagra to the Twin Towers? That might provide a display worthy of Tesla's
dreams, heh?
Gosh, must be way past my bed time......
dj