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RE: Trigatron


Robert and group,

The trigger time is nice, the voltage is ok the amps are great, but the 
deionization time of mercury blasted at thousands of amps is virtually 
forever or about three or four orders of magnitude longer than the trigger 
time.  The 300BPS spec is a bit wishful especially with an inductive load. 
 Give it a shot, however.  Many others have and none use the ignitons in 
Tesla service.  Alas, gas conduction is great in one aspect, but that which 
is given with one hand is often taken away with the other.

Richard Hull, TCBOR
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From: tesla
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Subject: Trigatron
Date: Tuesday, April 16, 1996 9:34AM

>From rwstephens-at-host.ptbo.igs-dot-net Tue Apr 16 01:13 MDT 1996
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From: "Robert W. Stephens" <rwstephens-at-ptbo.igs-dot-net>
To: hvlist-at-Anchorage.ab.umd.edu
Date: Mon, 15 Apr 1996 22:56:24 -0500
Subject: Trigatron
Cc: tesla-at-grendel.objinc-dot-com

Hello Jim Fosse, and the group,

Thanks Jim for your input.

A while ago I made mention that I had found a BIG mercury ignitron
tube in a surplus yard.  It was a type GL6228 made by General
Electric.  It turns out that this tube was also produced by
Westinghouse as type WL6228, and is also available through Richardson
Electronics from National as type NL6228.  If Henry Ford had made
these as well I guess they'd be called a FL6228!  I digress.

This is an interesting toob!  Some data directly from the National
poop sheet follows:

IGNITRON NL-6228
The NL-6228 ignitron is a stainless- steel-jacketed, water cooled
mercury-pool tube designed especially for pulse modulator
applications (Tesla coils?), rectifier service and for use as a dc
short circuiting switch (can crusher?).

<skip the stuff about using it as a humongous 20,000 volt PRV, 150
amps continuous rectifier tube>

DC Short-Circuiting Switch
Anode Voltage(volts).......................................1000 to 50,000
Anode Current(peak amperes).........................up to 30,000
Discharge Energy(Joules)................................up to 200,000
Ionization time(depends on trigger circuits)....less than 10 uSec
Cooling.............................................................water at
5GPM min
Net Weight.......................................................100 lbs

And how about this.  Consider the following typical example as
representative of this tube as a Pulse -Modulator.

40,000 volts DC
3,300 peak Amps.
360 PPS rep rete
3.2 uSec (I don't know if this was trigger time, or timing jitter.  I
do not believe it was pulse width.)

This could be fun to play with!  It looks like it may even serve in a
Tesla coil in lieu of the traditional rotary break up to some power
level that is on- par to large on the scale that most of us hobbyist coilers 

work at!.  I think I'll grab this rare find on speculation.

Comments anyone?

May the E field be with you!, rwstephens