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>

Sounds like a nice coil.  How big are the flames?  I think I am going to go 
wiht two 572b tubes.  My supply is 1750v -at- 350ma .  I think it will put out 
some nice purple flames.




>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: power transformers
>Date: Wed, 19 Jun 2002 09:03:40 -0600
>
>Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><evp-at-pacbell-dot-net>
>
>Tesla list wrote:
> >
> > Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>"
><rob-at-pythonemproject-dot-com>
> >
> > Tesla list wrote:
> > >
> > > 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
> > >
> >
> > No problem.  I have a unique vacuum tube tesla coil here. A 3ft high 2ft
> > diam form with copper tubing.  It resonates at 1.8Mhz, and is driven
> > with 3kW from an Eimac 8877 tube (It my ham linear amp).  Puts out a
> > nice big purple flame.  Unfortunately, the 8877 is a very expensive
> > investment and requires forced air cooling as it has an external metal
> > anode with radiator fins.  My power supply is 3500V at 5kVA max (weighs
> > 200 lbs).
> >
> > Some other tubes worth trying for a small coil would be the 1625, 811,
> > and 813.  They are old WW2 vintage types and are available for
> > practically nothing ($1 to $10) at ham swap meets.
> >
> > Rob.
>
>	Are you driving the coil from the regular antenna output of your
>linear?  Would be interesting to see more design details.  How much
>power do you run on ham bands?  Are you one of the 80 meter "long
>pathers"?
>
>Ed
>
>W6IZJ