Re: 811A first light

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

Original poster: "Dr. John Gudenas by way of Terry Fritz <twftesla-at-qwest-dot-net>" <comsciprof-at-ameritech-dot-net>

James
The 811A can only handle 175 mA on the plate -at- around 1500 volts. If you use
a MOT with out any current limiting device you will likely melt the plate.
Check out my triple 811A coil on:
www.scifair-dot-org/hvdata

John W. G.

John W. Gudenas, Ph.D.
Department Chair of Computational and Natural Science
Aurora University
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, July 09, 2001 12:20 PM
Subject: 811A first light


> Original poster: "James T by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jamest2000-at-att-dot-net>
>
> Hi everyone,
>  I am another vacume tube convert.
>  I recently purchased a gizmo that had a RCA 811A and the associated
SNIP
> > I worked! I got 3" brush discharge. Very hot. Melted the copper
> secondary wire into a glowing orange ball. When I raised the primary
> former up a bit, the output changed dramaticaly to mini sword like
> sparks I have seen in the photos. I had lots of fun playing around...
> until I got greedy.
>  The wimpy HV transformer is current limited with a .001uf mica cap. So
> of course I put another .001uf cap in parallel to boost the current.
> Naturally the transformer instantly fried. Oh well, now I will bring out
> the dusty MOT's I have.  SNIP
> Regards,
>  James T
>
>
>