Re: power transformers

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

Original poster: "R. Bergmann by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bergmann_-at-hotmail-dot-com>

Thanks for the info and for sticking up for me.


Ryan





>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: power transformers
>Date: Tue, 18 Jun 2002 08:04:01 -0600
>
>Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><rob-at-pythonemproject-dot-com>
>
>Tesla list wrote:
> >
> > Original poster: "Alexander Rice by way of Terry Fritz
><twftesla-at-qwest-dot-net>" <alex-at-rices.myip-dot-org>
> >
> > 17/06/2002 23:58:13, "Tesla list"
> > <tesla-at-pupman-dot-com> wrote:
> >
> > >Original poster: "R. Bergmann by way of
> > Terry Fritz <twftesla-at-qwest-dot-net>"
> > <bergmann_-at-hotmail-dot-com>
> > >
> > >Does anybody know where I can get some
> > high power/voltage power
> > >transformers?  I need ones with four
> > leads.  I am making a VTTC.
> > >
> > >
> > >Thanks,
> > >R.
> >
> > Umm,
> >         if you are specifying your
> > transformer on the basis of the number of
> > wires it has you should probably not start
> > with a vacuum tube based coil as they
> > requre a considerable knowledge of
> > electronics if you are to make it work
> > satisfactorily. Nonetheless, people often
> > use microwave oven tranformers for the B+
> > voltage, sometimes rewinding to obtain the
> > requred voltage, some use custom
> > tranformers for their specific tube. To
> > supply filament power most people wind
> > their own trasformer on an old core
> > because they only need a few dozen turns.
> >
> > really you would probably would do better
> > to scavenge a neon sign transformer and
> > make an ordinary spark gap coil and
> > progress form there
> >
> > regards
> >
> > alex
> > ------------------------------
> > Alexander JJ Rice
> > Geek#-1232
> > Rank : G-2 (Wahey!)
> > http://www.TheGeekGroup-dot-org
> >
> > ICQ : 114007491
> > MSN : ajjrice-at-yahoo-dot-com
>
>I wouldn't discourage him.  Vacuum tubes are much more forgiving than
>MOSFETS :)  Be sure to include a 50ohm 100W resistor in series with your
>B+ to the tube.  Tubes when operated over-voltage will frequently flash
>over, and the resistor makes the behavior mostly harmless.  I would
>recommend 1 3-500Z tube.  They are triodes with pretty high B+ rating.
>Sockets are cheap, and the tube can be convection cooled. You can get
>them new for $150 or used very cheaply.  The most desired tube is the
>4-1000 obtained as broadcast pulls.  So make friends with an AM
>broadcast technician.  Rob.
>
>--
>-----------------------------
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>
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