Re: Micro Tesla Coil design

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

Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

Hello,

Im guessing its all a voltage multiplier as there is no ground return, and 
its epoxy potted and its so small.  It runs from 120v.  The sparks are VERY 
DIM.  I couldnt imagine rating in an a milliamp range.  Its harmless to 
touch, an makes a thin static like snapping spark at about 3/8" or a 
constant corona at about 1/4".  Like i said, it takes about 6 seconds to 
charge ,03uf to about 5KV to arc the spark gap.

DAN:

take a look at mi-lasers in there solid state laser parts.  There is a 
10kvdc PSU that uses 10-15vdc in.  Its very small, and i think like 
20bucks, maybe 30.

Also, why not just make your own small voltage multiplier and make a small 
coil that maybe fires about 1-5times a second?  It would be a lot easier 
than making a transformer, and it would not need current limiting, and 
would probably be cheap.  But probably tough to make it as small as you wanted.

Steve Ward.





>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Micro Tesla Coil design
>Date: Thu, 19 Dec 2002 18:13:24 -0700
>
>Original poster: "Jolyon Vater Cox by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
>
>You mentioned a 7.5kV ionizer PSU-
>do you know how it is constructed ie. is it Cockcroft-Walton ladder-type
>voltage multiplier, mains transformer plus rectifier or something else and
>is there a schematic for this PSU?Also, how many milliamps would it
>deliver -as
>I am wondering whether or not a Cockcroft-Walton voltage multiplier supplied
>with AC mains voltage (240V in UK) could supply enough current at a few kV
>for a micro- or mini-TC.
>
>Jolyon.
>
>
>Jolyon.>
> >
> > I have made a very small coil.  It was 4.5" diameter x 11" tall (the whole
> > thing!).  The PSU was a 7.5kv air ionizer PSU(maybe 1.25x.75x1").  IT was
> > DC.  I used that to charge an old 10kv .03uf cap to about 5kv.  It took
> > about 6 seconds to do that.  THen it would self fire into a 4 turn primary
> > of 12awg with a 4.5" diamter.  The secondary was 3.5" x 8" tall of 28awg
> > wire.  Sparks were about 4" long.  It was safe enough (it was all enclosed
> > and insulated) for me to pick it up and zap things with it.  It was like
> > touching a strong VDG, the spark that is.  After awhile i got sick of it
> > and took it apart.  Oh well, but it was pretty fun!
> >
> > Steve Ward.
> >
> >
> >
> >


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