Re: power transformers

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

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