RE: Valves

To: tesla-at-pupman-dot-com
Subject: RE: Valves
From: "Dr. John W. Gudenas" <jgudenas-at-admin.aurora.edu> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Fri, 24 Sep 1999 16:38:09 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Mark
While it is certainly possible to make a saw tooth oscillator
with a thyratron I am not sure this is the best approach for
an initial tube coil. Some of the list members have experience
using thyratron circuits that, in a sense, substitute for the
spark gap oscillator (I am trying to avoid a long discussion).

I suggest that you find a high power triode or tetrode and use a
simple time proven plate tuned oscillator circuit with self rectification.
 For example 811A and 810 tubes can build tube coils capable of 10-12" corona.
An 833A can build a really nice and quite powerful CW coil that
can produce 24" corona discharge.

However, that thyratron is a dandy tube that I would certainly pick up
for the right price and add it to the parts supply. There are quite a few
HV uses (including tesla coil applications). It is simply my opinion that
this is not a good starting point.
Remember RF burns.
John

John W. Gudenas, Ph.D.
Department Chair of Computational and Natural Science
Aurora University, Aurora IL 60506
Office: 630-844-5539     Fax: 630-844-7830

-----Original Message-----
From:	Tesla List [SMTP:tesla-at-pupman-dot-com]
Sent:	Wednesday, September 22, 1999 7:57 PM
To:	tesla-at-pupman-dot-com
Subject:	Valves

Original Poster: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au> 

Hi Again,

I recently asked about the following tube:

CV2520
KB/P		1 of, a large beast with additional markings 5C22/NC

So, I found looking through the www:

Hydrogen Thyratron
Peak forward anode V:	16kV		(a smile appears)
Ave anode current:	200mA
Peak anode current:	325A		(a slightly larger smile)


 From the little notice I have taken of tube postings, i suspect this would 
be well suited to a tube-based coil.

Now, I have NO experience with tubes per se (but I'm keen!).  Could some 
kind person give me an idea of where to start (a schematic would be 
outstanding).

Many thanks

Mark




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