Re: Triggered gap questions

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Jonathon,

On 25 Jul 01, at 11:29, Tesla list wrote:

> Original poster: "jpeakall by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jpeakall-at-mcn-dot-org>
> 
> Howdy all,
> 
> Started messing with a triggered gap last night, and I realized I didn't
> know how they are supposed to act. With no caps in circuit, power arcing
> only, should turning off the trigger extiguish the arc? Should the arc go
> from sg electrode to the trigger 'ode and then to the other sg 'ode, or once
> fired should it cross the sg 'odes only, and skip the trigger 'ode? My
> trigger 'ode was getting hot, fast.
> 
> What about setting/tuning TSGs? Set the gap just far enough that the nst
> alone can't fire it, or wider or what?
> 
> Thanks, as always!
> 
> Jonathan Peakall

In answer to your first question, no. The gap can only turn on when 
the trigger pulse is applied. The trigger electrode should have a 
*very high* source impedance. I'm not surprised the arc heated the 
electrodes. There was no incentive for the gap to turn off the way 
you were using it.

Malcolm