Re: DC Spark gap coils, why not current limit on the LV AC side?

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


You might also try hooking a 500 pF 40 kV ceramic style cap directly across
the spark gap.  Early wireless pioneers used this method to obtain a
"negative resistance" in the sparkgap.  The cap is charged and fires to
ionize the plasma thus saving the tank caps energy to provide the resonance
without losses.  Poulson used these techniques and others to make the spark
gaps more efficient.

Dr. Resonance

 >
 > I have solved to my satisfaction the problem of DC power arcing.  I use DC
 > resonant charging, with the inductor being about 200 mH.  The key is to
 > charge the tank cap through one set of gaps on a RSG, then use another set
 > of gaps to discharge the tank cap through the primary coil.  As the rotor
 > turns, this action repeats.  My RSG has 8 spinning electrodes and two sets
 > of stationary electrodes.  There is never a spark gap directly across the
DC
 > power supply - resonant inductor - deQing diode, so there is no power
 > arcing.  Break rates can be as slow as you want.
 > --Steve Y.
 >
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Tuesday, July 20, 2004 9:09 PM
 > Subject: DC Spark gap coils, why not current limit on the LV AC side?
 >
 >
 >  > Original poster: "Hydrogen18" <hydrogen18-at-bellsouth-dot-net>
 >  >
 >  > I'm interested in the idea of DC Tesla coiling, and was wondering, why
is
 >  > it that you cannot simply put a ballast on the LV side of your 60 hz AC
 >  > step up transformer and use that to prevent your rectifiers from
blowing
 >  > when the spark gap fires? I understand this would not allow for the
 >  > doubling of the peak voltage of the capacitor like when a charging
reactor
 >  > is used on the HVDC output, but it seems like it would limit the
current.
 > I
 >  > guess the problem of rotary gap power arcing still exists when a
ballast
 > is
 >  > placed on the LVAC primary side of the transformer?
 >  >
 >  > ---Eric
 >  >
 >  >
 >  >
 >  >
 >
 >
 >