Re: Capacitor construction

To: tesla-at-pupman-dot-com
Subject: Re: Capacitor construction
From: Mark S Graalman <wb8jkr-at-juno-dot-com>
Date: Sat, 19 Oct 1996 06:59:13 EDT

On Fri, 18 Oct 1996 22:25:30 -0600 Tesla List <tesla-at-poodle.pupman-dot-com>
writes:
>> Subject: Re: Capacitor construction
>> >Subject: Re: Capacitor construction
>> >>Subject: Capacitor construction
>
>>From bert.hickman-at-aquila-dot-comFri Oct 18 21:55:52 1996
>Date: Fri, 18 Oct 1996 07:08:36 -0700
>From: Bert Hickman <bert.hickman-at-aquila-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Capacitor construction
>
>Tesla List wrote:
>> 
>> >From wb8jkr-at-juno-dot-comThu Oct 17 21:27:12 1996
>> Date: Thu, 17 Oct 1996 05:49:46 EDT
>> From: Mark S Graalman <wb8jkr-at-juno-dot-com>
>> To: tesla-at-pupman-dot-com
>> Subject: Re: Capacitor construction
>> 
>> On Wed, 16 Oct 1996 23:05:23 -0600 Tesla List 
><tesla-at-poodle.pupman-dot-com>
>> writes:
>> >>From mhammer-at-midwest-dot-netWed Oct 16 23:01:34 1996
>> >Date: Wed, 16 Oct 1996 19:39:13 -0500 (CDT)
>> >From: Mike Hammer <mhammer-at-midwest-dot-net>
>> >To: tesla-at-pupman-dot-com
>> >Subject: Re: Capacitor construction
>> >
>> >At 10:25 PM 10/13/96 -0600, you wrote:
>> >>>From bmcpeak-at-gte-dot-netSun Oct 13 22:17:28 1996
>> >>Date: Sun, 13 Oct 1996 08:04:53 -0500
>> >>From: Brad McPeak <bmcpeak-at-gte-dot-net>
>> >>To: tesla-at-poodle.pupman-dot-com
>> >>Subject: Capacitor construction
>> >>
>> >>Hello All,
>> >>I would like to get the list subscribers input on capacitor
>> >construction. I
>> >>have built several roll caps ala TCBOR, they work great.(Thanks
>> >Richard H.)
>> >>I would like to build a Vertical plate cap. One thing that escapes 
>me
>> >is how
>> >>do you bond the plates to PE or otherwise keep them from sliding 
>down
>> >in a
>> >>vertical Cap? I have seen it mentioned about clamping the the 
>stack
>> >>together, would this not hinder the air from escaping if tight 
>enough
>> >to
>> >>keep the plates from vibrating down? I will not be able to vacuum 
>the
>> >cap
>> >>down. Since hot melt glue is PE could this be run in a thin border
>> >around
>> >>the edge of the metal would it continue to hold the plate under 
>oil?
>> >And
>> >>last would Polystyrene which is fairly rigid work better as far as
>> >bonding?
>> >>I believe its electrical properties are close to PE? Thanks in
>> >advance.
>> >>Brad McPeak
>> >>E-mail bmcpeak-at-gte-dot-net
>> >>McPeak Antiques
>> >>http://home1.gte-dot-net/bmcpeak
>> >>
>> >>
>> >
>> >
>>         Hi Brad,
>> 
>>  I have two flat plate PE caps, one with 80 plates, one with 30 
>plates
>> and they are mounted with the plates in a
>> verticle configuration, I  stacked my plates and then
>> clamped them between two pieces of 3/8" thick lexan
>> before placing the whole assembly into the contaier of
>> oil. Both of my caps are 4 years old now and are still
>> working fine.
>> 
>>                         Mark Graalman
>
>Mark,
>
>This is GOOD news. The chemical resistance chart from Laird Plastics
>indicated that Lexan and Polyproylene might have a limited life with
>Mineral Oil. Actual "hard" experience from other coilers is VERY 
>useful
>- I suspect Laird's ratings may be overly conservative. Sounds like we
>mighty be able to change the "C" to a "B" for Lexan in the table
>recently posted per Malcolm's request.
>
>Safe, non-leaky, coilin' to ya!
>
>-- Bert --
>
Well Bert, 

 Maybe I should have been more clear, I really don't know
anything about mineral oils effect on plastics, but I'm
using transformer oil in my capacitors just for your info. However, a
friend of mine has used mineral oil in his caps and has not had a
problem.


			Mark Graalman