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Re: Thyratron pair (was DC Drive)



---------- Forwarded message ----------
Date: Mon, 13 Oct 1997 08:40:23 -0400 (EDT)
From: richard hull <rhull-at-richmond.infi-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Thyratron pair (was DC Drive)  

At 09:58 PM 10/12/97 -0600, you wrote:
>
>
>---------- Forwarded message ----------
>Date: Mon, 13 Oct 1997 08:59:01 +1200
>From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
>To: tesla-at-pupman-dot-com
>Subject: Re: Thyratron pair (was DC Drive) 
>
>Hi Richard,
>
>> From: Richard Wayne Wall <rwall-at-ix-dot-netcom-dot-com>
>> To: Tesla List <tesla-at-pupman-dot-com>
>> Subject: Re: Thyratron pair (was DC Drive)
>> 
>> 10/12/97
>> 
>> Bert wrote: 
>> 
>> snip
><SNIP>
>> 
>> So, why not determine the requirements of a particular resonator and 
>> design our drivers to provide only these requirements?  We may be able 
>> to exprimentally provide even better waveform content than that which 
>> occurs naturally. 
>
>???
> 
>> Think about Dr. R's version of the extra coil where he has eliminated 
>> the driver secondary altogether and drives the extra coil from the 
>> primary alone.  The reason this works is that there is fast rise time 
>> and the the required extra coil wave content is available.
>> 
>> As we become more familiar with these driving techniques, we will 
>> eventually be able to elminate the primary/secondary driver altogether 
>> and directly drive the resonator electronically.  
>
>I should point out that this is essentially CW drive and that this 
>has all been done before. Duane Bylund published a CW fed mag 
>some time ago using a 1/2 bridge driver. The real trick would be to 
>get power disruptively into a single resonator. I don't think it can 
>be done without using at least one other coil but I could be wrong.
>I would regard a tap on the resonator as equivalent to using a second 
>coil.
>
>Malcolm
>
>All,

I agree with the CW supposition and two coil bit.  The H2 Thyratron
IS..,repeat IS,..a spark gap and IS disruptive in nature.  This is due
solely to its on incredibly low resistance and absolute analog to a gas air
gap.  No vacuum tube will ever be pressed into this kind of service!!!! (H2
Thyratron is not a vacuum tube).

The biggest filament on the planet boiling off huge amounts of electrons
will never equal the conducting power of the weakest of the H2 thyratrons!
The strongest H2 thyratron will never equal the conducting power of a simple
air gap!

H2 thyratrons just allow maggey work to go forward with tens of nanosecond
on and off times under a modicum of control (something tough with a common
air gap.)

Richard Hull