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Increasing Capacitance...
From: David Huffman[SMTP:huffman-at-FNAL.GOV]
Sent: Monday, September 22, 1997 10:35 AM
To: 'Tesla List'
Subject: RE: Increasing Capacitance...
I have sent pictures of two situations involving the use of different oils of different dielectric constants. If the space between the foil and the film is occupied by oil of a similar dielectric constant as that of the film then the voltage stress on the film will be lower than if the oil has a higher dielectric constant. It might be wise to avoid large differences in this constant as way pointed out in previous messages. Like all aspects of coiling there is a trade off. The gain in capacitance will be had by the loss in voltage rating. Imperfection in the film might be magnified by the higher dielectric constant oils.
Thinking out loud, zap me if I need it.
Dave Huffman
From: Thomas McGahee[SMTP:tom_mcgahee-at-sigmais-dot-com]
Sent: Friday, September 19, 1997 2:43 PM
To: Tesla List
Subject: Increasing Capacitance...
> From: bmack[SMTP:bmack-at-frontiernet-dot-net]
> Sent: Sunday, September 14, 1997 10:42 PM
> To: Tesla List
> Subject: Re: Glass/poly and more...
>
snip
Does anyone out there notice the similarities here between THIS post
and my posts concerning Richard Smit's idea for a poly/glass
capacitor? Richard Hull, I believe in one of your tapes you
disassembled an OLD HV cap that had an extremely high capacitance
value for its size. It was a rolled affair, and I believe your
conclusion was that the darn thing was using an oil with a very high
dielectric constant. I think we coilers would do well to identify
which oils out there are readily available that have the higher
dielectric constants. Sunison appears to be one that has a constant
of about 4. Castor Oil is even higher. Alfred Skrocki mentioned that
he also used Sunison oil successfully. But he didn't mention whether
he noted the increase in capacity over using regular mineral oil or
transformer oil.
With the cost of Tesla capacitors being fairly high, even when they
are homemade, it just seems to me that we coilers should be
aggressively investigating what oils we can use that will give us an
appreciable increase in capacitance. Would anyone who has First Hand
knowledge of an oil with a dielectric constant greater than say 2.2
that has successfuly been used in Tesla coil capacitors please post
to the List, or e-mail me at tom_mcgahee-at-sigmais-dot-com with as many of
the details as you can recall. Thank you.
Hope this helps.
Fr. Tom McGahee