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Re: Valves

It's certainly possible to build oscillators using thyratrons, in fact at
work I have a small one running at 10GHz!! A bit high for your needs, it's
also a very low power device (about 2-3mW). If you loook in an old ARRL
handbook you might find a circuit, but you will probably have to go back a
bit. Certainly low power microwave ones were included up to about ten or
fifteen years ago.


----- Original Message -----
From: Tesla List <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, September 24, 1999 11:38 PM
Subject: RE: Valves


> Original Poster: "Dr. John W. Gudenas" <jgudenas-at-admin.aurora.edu>
>
> 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
>
>
>
>
> _______________________________________________
>
> Tesla Home Page:   http://www.adelaide-dot-net.au/~mefinnis/
> _______________________________________________
>
>
>
>
>