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Re: 5949 Thyratron specs

Tesla List wrote:
> 
> >From leyh-at-ix-dot-netcom-dot-comSat Aug 31 10:34:22 1996
> Date: Sat, 31 Aug 1996 00:11:43 +0000
> From: "G.E. Leyh" <leyh-at-ix-dot-netcom-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: 5949 Thyratron specs
> 
> Here's some general specifications for the 5949/5949A:
> 
> Peak fwd anode voltage - 25kV
> Peak anode current - 500A
> Average anode current - 500mA
> Anode heating factor - 6.3 e9
> Peak output power - 6.0 MW
> 
> Heater Voltage - 6.3VAC
> Heater current(max) - 22.0 AAC
> Tube heating time - 3 minutes
> 
> Reservoir Voltage - 3.0 to 5.5V
> Reservoir Current - 6.0 AAC
> 
> Grid Drive (min) - 550V
> Grid pulse duration - 2uS min
> Grid impedance - 200 ohms min
> 
> BASE CONNECTIONS:
> (Clockwise, as viewed from bottom.  The pin off by itself is pin 3)
> 
> 1 - Heater
> 2 - Cathode
> 3 - Grid
> 4 - Reservoir
> 5 - Heater
> 
> Top cap - anode
> 
> This tube does not appreciate reverse conduction. (anode ablation)
> 
> The 5949/5949A has had a long history of radar modulator service,
> and pulsed-power supplies for small klystron tubes.  The modern-day
> replacement for it is the CX1140.
> 
> It's always good to see that people are still interested in
> ballistic electron devices.  What are you going to do with these
> thyratrons, anyway?
> 
> -GL


Greg,

Thanks once again for a timely reply and with the right info!

I hope to utilize these in my DC electrostatic generation system research 
with tight coupling which demands ultra quick switch times.  I'll 
commutate the pulse from the thyraton by the usual method of "end of DC 
high power pulse shutdown". i.e. Rotary application of power pulse to 
anode-then trigger near end of rotary commutation.  This way, I can 
control the front end of the rotary timing (thyratron) and let the rotary 
control the back end (shut the thyratron down.) Gotta figure some grid 
circuitry and triggering stuff and it will be tricky, but I hope worth 
the effort.  No long sparks in this device, but the high peak power 
levels and rapid on times, variable dwell, etc, are needed.

I used to fart with a lot of high power tube industrial electronics 
during my early engineering days (60's)

Richard Hull, TCBOR