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Re: Not shooting for anything gloriuous, but... (fwd)
to: Mike
No, if you add dielectric material to the outside of the bottle you are
increasing the (d) distance between the plates and you will be lowering the
capacitance not raising it.
If you add plastic material to a glass dielectric material you will create
some strange problems due to the difference in the dielectric constants
between glass (around 7) and plastic (around 1), so you want to avoid this
altogether. The electrostatic fields in the dielectrics will be stressed
and uneven.
Either buy good commercial caps or get to work and build your own poly
caps --- it's not that hard. Bob Vogler recently had a post on a very good
design.
Regards,
Dr.Resonance-at-next-wave-dot-net
-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Sunday, April 18, 1999 2:32 AM
Subject: Re: Not shooting for anything gloriuous, but... (fwd)
>Original Poster: Hollmike-at-aol-dot-com
>
>In a message dated 4/17/99 3:06:26 AM Mountain Daylight Time,
>tesla-at-pupman-dot-com writes:
>
>>
>> Wouldn't it be possible to take a glass jar or LDPE plastic bottle, and
>> wrap it with multi-layers of say .003 mil or .006 mil poly on the
>> outside to increase the given capacitance AND help cut down the high
>> voltage breakthrough as well? Seems like this is a cheap and quick
>> solution to "glass cappers". The foil could then be tightly wrapped
>> around the poly layers in the traditional way.
>>
>> It seems an easy solution. In the same way multi-layers prevent
>> breakthrough with our rolled poly caps, they could do the same here.
>>
>> Anyone tried this before? Comments?
>
>You will decrease the capacitance by making the dielectric layer thicker.
It
>may help in the voltage standoff capability, but putting the bottles in a
>series/parallel arrangement would probably do better.
>