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Re: Valves
In a message dated 99-09-23 17:58:43 EDT, you write:
<< 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 >>
Mark,
Generally hydrogen thyratrons are not used for tube coils.
One could be built that way, but it would not be a traditional design.
The usual way to build a tube coils is to use vacuum tubes; either
power, or transmitting types.
Richard Hull has done some work with classic TC's by replacing
the spark gap with a hydrogen thyratron. This however is not a tube
coil in the traditional sense. It is a tube coil in the sense that it uses
a tube however.
The traditional circuit for a tube TC is quite different than the circuit for
a spark gap TC. In a spark gap TC, the spark gap is in series with the
resonant tank circuit components. In a traditional tube TC, the tube is
external to the tank circuit. A spark gap TC (or a hydrogen thyratron
based TC) uses a damped wave. A traditional tube TC produces a
continuous wave RF output.
Cheers,
John Freau