I have 3 MMC's I have built with these Caps.Doug
-----------------------------------------From: "undisclosed recipient
via Tesla"
To: "Tesla Coil Mailing List"
Cc:
Sent: Saturday October 20 2018 9:39:33AM
Subject: Re: [TCML] Brush copper plating onto polystyrene
A company called Information unlimited has a .5uF cap at 2000 VAC.
They have not failed in 3 years of usage.
Not sure the cost/ea as I got a discount for being a beta tester.
> On Oct 19, 2018, at 22:28, Steve White wrote:
>
> Instead of trying to build your own HV capacitor, one of our TCML
members is offering an excellent Maxwell capacitor suitable for a
small NST-powered TC. It is 0.02 uF rated at 45 KV. You would probably
spend as much or more, not to mention your time, trying to build your
own capacitor. Here is the E-Bay link (ends tomorrow).
>
> https://www.ebay.com/itm/173587314902 [1]
https://www.ebay.com/itm/173587314902>
/> >
> Steve White
> Cedar Rapids, Iowa
>
> ----- Original Message -----
> From: "Matthew Sweeney"
> To: "Tesla Coil Mailing List"
> Sent: Friday, October 19, 2018 7:27:56 PM
> Subject: Re: [TCML] Brush copper plating onto polystyrene
>
> From experience I'll say that whatever the voltage rating
(depending on
> material thickness, flatness of conductor etc.) Once it punches
through it
> will have effectively 0KV rating :)
>
> Not saying that it isn't fun to build your own caps, but without
self
> healing or at the very least the ability to replace parts of an MMC
it can
> get extremely frustrating and time consuming.
>
> Depending your motivation to use a self made capacitor keep in mind
you can
> build an MMC for reasonable cost that can provide good reliability
and ease
> of repair.
>
>
>
> On Fri, Oct 19, 2018, 4:05 PM wrote:
>
>> I have been experimenting with home rolled Caps and would like
some
>> help with values please?Using food saver tubes as the dielectric,
>> dielectric is 36" X 8", foil inserted in the food saver tubes is
32" X
>> 6", uf measures 14uf as rolled. What would be the voltage rating?
So
>> far I have used one in a small TC [7.5k NST] and have not
destroyed
>> it! All-tho it buzzes loudly.Doug J.
>>
>> -----------------------------------------From: "jimlux"
>> To: tesla@xxxxxxxxxx
>> Cc:
>> Sent: Friday October 19 2018 11:17:01AM
>> Subject: Re: [TCML] Brush copper plating onto polystyrene
>>
>> On 10/19/18 8:59 AM, Matthew Sweeney wrote:
>>> Good info, although I'd still like to find someone who has done
>> similar
>>> work with one of those inflatable exercise balls.. that would be
an
>> awesome
>>> VDG terminal :)
>>
>> It's out there in the archives.. Except it was a kid's bouncy toy,
>> the
>> name of which I cannot remember, they have a loop sticking out of
the
>>
>> top that you hang on with.
>>
>> When I worked at the effects shop, we made some large "pendulum
bobs"
>>
>> for a sort of "giant executive toy"
>> (
>>
https://www.amazon.com/JoyTech-Newtons-Collision-Decompression-Psychology/dp/B07921155N
[2]
https://www.amazon.com/JoyTech-Newtons-Collision-Decompression-Psychology/dp/B07921155N>
/> >> )
>> />
>> using those things, somewhat overinflated, covered with
fiberglass,
>> then
>> spray painted aluminum. They weren't heavy enough without the
>> fiberglass
>> to swing like we wanted, but for an electrode, maybe ok.
>>
>> A hole will cause it to deflate.
>>
>> You might be able to figure out a way to inflate and deflate it,
but
>> for
>> a VDG, you need the hole for the belt, so using it as a form upon
>> which
>> to make something rigid.
>>
>> If you want a plastic hemisphere, a good way is to build a box
with a
>>
>> plywood top and a circular hole. You lay a sheet of plastic on
top,
>> heat it with radiant heat, then use a vacuum cleaner to pull a
vacuum
>>
>> under it, and it will form a nice hemisphere. Let it cool, repeat
it,
>>
>> saw the flange off and join it.
>>
>> But a spherical buoy might be a cheaper way to go..
>>
>> Kwiktek B-20R from amazon is
>>
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/> >> />
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/> >>
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Links:
------
[1] https://www.ebay.com/itm/173587314902
[2]
https://www.amazon.com/JoyTech-Newtons-Collision-Decompression-Psychology/dp/B07921155N
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