Re: Sold state IGBT disruptive coil spark gap idea

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Interesting things!!!

Anther person is using an SCR and zener strings since he can't get 
SIDACs in his location...

Cheers,

        Terrry


At 02:25 PM 5/22/2006, you wrote:


> > You have to be careful to turn up the variac until is just starts 
> > to run smoothly (120 BPS) and no more.  If you turn up the voltage 
> > too high, the BPS rate can go up dramatically and overheat the 
> > IGBTs.  Higher BPS does not seem to increase spark length other 
> > than making them sound funny.  Sort of "screetchy".
> > Thanks for everyone's help, input, and encouragement!!!  Looks like 
> > we all have a new toy :-))))
>
> Terry,
>
> Sidacs are interesting.  Even more interesting are programmable 
> unijunctional transistors or PUTs.  PUTS are a misnomer because they 
> are not unijunctional transistors, but are kin to thyristors.  The 
> neat part about them is triggering voltage can be set or varied with 
> a simple resistive voltage divider.  Instead of multiple fixed input 
> sidacs only one voltage divider controls the PUT.  It's 
> programability allows it to function over a wide variety of input 
> voltages.  Parts count goes down, it's cheaper to build and it 
> offers better control.
>
> stork