Re: Somewhat of a newbie..

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Nick Andrews by way of Terry Fritz <twftesla-at-qwest-dot-net>" <nicothefabulous-at-hotmail-dot-com>

Hi,

These caps sound similar to the 2 Eimac vacuum caps I bought on ebay a while 
back.  I haven't tried thwm for anything yet, they just looked really cool.  
I think they are (were) used in military transmitters and such.  I am 
looking for more info on them myself.  Too bad I can't make it to CA to get 
the big caps, I'll have to find some laying around Denver somewhere...

Nick Andrews


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Somewhat of a newbie..
>Date: Tue, 26 Jun 2001 13:16:29 -0600
>
>Original poster: "Jason Petrou by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><jasonp-at-btinternet-dot-com>
>
>Hi Ben,
>
> > About 6 months ago I finally built my first coil. I've
> > since had ALOT of questions and I remembered that the best
> > minds colaborate on this list.. Anyway, my question
> > involves capicitors.. I started out using saltwater caps
> > made from beer bottles.. but I realized that I had no way
> > of knowing how much capacitance I had.. is there any way to
> > test them or is there some general default value per
> > bottle?
>Not sure... there is a standark capacitance for a pint bottle - cant
>remember what it is though :)
>
> > I also ordered 4 caps vacuum sealed in a glass
> > envelope rated 12pF -at- 30kV each .. they're absolutely
> > beautiful.. each one is about the diameter of a soup can
> > and about 8 inches long.. will these work in coiling
> > applications? The glass envelope is about 1/4 of an inch
> > thick and the lugs on the ends are very hefty.. they look
> > like they'd survive a nuclear war...
>I reckon that they would do the job... however I cant say exactly. Do you
>have any idea what the dielectric is? Some dielectrisc are completely
>unsuitible for pulsed applications, whereas some are perfect.
>
> > When I was subscribed to the list way back when I happened
> > on a large tube labeled "Amperex 575A".. I asked around on
> > the list and I was told that it was basically a giant
> > switch capable of switching extremely large currents and
> > that it would be excellent for building a DC coil.. since
> > then I've come across anohter and the idea of using it is
> > more and more appealing.. can anyone tell me more about it?
>Possibly... I think that you would need four though and make an H bridge 
>out
>of them. I have a better idea: use it for a joule gun. Get a couple of high
>power 1KJ caps and use them...
>
>Have fun
>Jason
>
>
>

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