Re: Better Spark Gaps

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

Original poster: "boris petkovic by way of Terry Fritz <twftesla-at-qwest-dot-net>" <petkovic7-at-yahoo-dot-com>


--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Jim Lux by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>
> 
> 
> > >
> > > Geometry of static spark gap ventileted with
> powerful
> > > air flow (approaching 330 m/s) may offer
> quenching
> > > after first transfer of energy to
> secondary,which is
> > > nearly impossible to accomplish by best rotary
> alone
> > > if high coupling (~0.2) set.
> > > Progress here is still possible but ,as
> always,on a
> > > burden of coilers' expense.
> > 
> > If 1st transfer quenching can be achieved without
> > a special gas, but simply with a powerful air
> blast,
> > that would be excellent, since simplicity is
> desireable.
> > Powerful air blasts may disrupt the firing, or
> cause
> > looping arcs in some cases maybe.
> > 
> 
> Marx (Erwin, not Karl) was a big fan of blast gaps,
> and Fruengel covers
> them extensively, in a triggered configuration.  You
> don't need a huge
> amount of pressure or flow to get supersonic flow in
> a small orifice, 
---
You do not need powerfull in terms of power ,but local
supersonic,that can be achieved by system of electrode
geometry and source of blowing.
Ambiental supersonic flow has considerable dynamic
pressure by itself (Bernoulli first published
equations some 300 years ago).
---  

which
> is all you need.


 I suspect that there is going to be
> a careful balance
> between providing enough cooling/movement to let the
> arc "cool out" between
> "beats"(notches) and not cool off too much during RF
> current reversals.
--
At small power systems that issue is more problematic
than at powerfull arc happenings.


> There will also definitely be an interaction between
> the resonant
> frequencies of the primary and secondary, and the
> coupling (which sets the
> "time to first notch")
---
That's for a sure.

regards,
Boris


 
 
 


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