Re: My first coil

["Steve" <Steve-at-xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Personally I wouldn't worry over which size secondary you choose, all things
being equal you'll get similar results on a first coil. Only problem is that to
get the required inductance you'll need to use finer wire with the smaller
secondary which can be a pain. There are details of a small coil using a tablet
container for the secondary former on my website
<http://www.teslauk-dot-com>http://www.teslauk-dot-com
 
----- Original Message ----- 
From: Tesla list <<mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com>
To: <<mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com>
Sent: Wednesday, November 15, 2000 11:36 PM
Subject: Re: My first coil

> Original poster: <mailto:FutureT-at-aol-dot-com>FutureT-at-aol-dot-com 
> 
> In a message dated 11/15/00 2:08:12 PM Eastern Standard Time, 
> <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com writes:
> 
> > Original poster: "Paul Benham"
<<mailto:Paulb-at-woodanddouglas.co.uk>Paulb-at-woodanddouglas.co.uk> 
> >  
> >  I am looking towards building my first coil.  I have looked at various
> >  web sites and the archives on pupman, as well as ordering a couple of
> >  books and some software.  Some questions:-
> >  
> >  I have a 900Va.c. 0.5A transformer.  This requires too much capacitance,
> >  but should I contemplate building with this as a cheap start, with less
> >  capacitance, or am I wasting my time.
> 
> Paul,
> 
> You can use two microwave oven transformers with the cores both
> grounded to a common point to get about 4kV with high current.
> One time I used 4 MOT's in series to get 7kV, but the cores were
> on the edge of breakdown, although I did get 63" sparks nevertheless.
> some folks use doubler circuits with two MOT's to get more voltage.
> These transfomers are very lethal of course.  And the NST's are 
> lethal too.  Best bet is probably an NST if you can find it.  OBIT's
> (oil burner ignition transformers) are good too if they can be found
> in the UK.
>   
> >  
> >  I have thought about a 1" diameter secondary as a start, or should I
> >  think about a 2" Secondary(I only have a small garage).  My worry is I
> >  will build something which will not spark at low enough power inputs,
> >  and I believe that both sizes will take about the same amount of time to
> >  build.
> 
> IMO, this is kind of small.  I like to make the secondary at least
> 3" dia, by 12" tall, and often much larger.  Many folks have built
> smaller coils though.
> >  
> >  Does anyone know of anywhere in the U.K where I can get an NST on the
> >  cheap, or a good supplier of Polycarb caps that I can use to make a
> >  MMC?  I have looked at RS/Farnell, but they do not seem to have anything
> >  suitable.
> >  
> >  Are there many people in the U.K. coiling?
> 
> There are quite a few folks coiling in the UK, you'll enjoy seeing
> the webpages of the various UK teslathons which are held quite often.
> 
> My webpage is at:
> 
>  
<http://hometown.aol-dot-com/futuret/page3.html>http://hometown.aol-dot-com/futuret/
page3.html
> 
> You'll find theory, photos, etc there, etc.
> 
> Cheers,
> JOhn Freau
> 
> >  
> >  Thanks in advance,
> >  
> >  Paul.
> 
> 
> 
>