Re:re: sync, phase, LTR-ness

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Tesla729-at-cs-dot-com>

In a message dated 3/29/02 5:52:22 PM Pacific Standard Time, tesla-at-pupman-dot-com 
writes:

<< 
 3)  In the normal mode, the gap stops firing if the power is increased.
      In the atypical mode, this doesn't occur.
  
Cheers,
John  >>

Hi John, 

My pole pig coil is RSG running asynch, so this may be a different ball
game, but I recall when I placed the stationary electrodes on the 3 o'clock
side of the motor, the SG would not fire at all, but yet when I placed the
stationary electrodes on the 9 o'clock side of the motor, the SG fired
quite reliably. I remember posting this observation about a year or so
ago and it seemd that no one could explain this effect. BTW, my cap
is STR (smaller than resonant) at 82 nFD and I am running the input
of a 10 kVA, 14.4 kV pole pig thru a 28 amp variac and a Linclon 225
amp arc welder as the ballast. Maybe there is some correlation here
to what you're talking about? In my case though, it didn't matter what
voltage position the variac was set at, the SG would not fire with the
stationary electrodes set at the 3 o'clock position but fire perfectly fine
with the stationary electrodes set at the 9 o'clock position. In other
words, I just moved the stationary electrode supports to the opposite 
side of the RSG drive motor. And it didn't matter what speed I turned 
the RSG drive motor to either. A real head scrather ;-/ Anyway, when 
I did get it to firing at the 9 o'clock position, I ended up with 10 ft. 
sparks :-) 

Here is a few specs of my system:

power supply: 14,400 volt, 10 kVA pole pig ballasted thru a 240 volt/
                      28 amp variac and a 225 amp arc welder set at 225 amps

spark gap:      1/3 HP, 3450 RPM B & D bench grinder motor with the 
                      guards and emory wheels removed and replaced with
                      a 3/8" thick X 10" dia lexan disc on each end shaft and
                      affixed with (6) each 2" long X 3/8" dia. brass 
all-thread
                      for rotory electrodes on each disc. The statioanry elec-
                      trodes (4) are 4" long X 1/2" dia. brass all-thread and 
are
                      each affixed with (4) 2" X 2" X 1/8" thick alum. squares
                      to assist in cooling.

primary coil:    about 31 uH ( 7 turns of 5/8" copper tubing in a spiral
                      pancake arrangement about 13 1/2" on the inner turn
                      and about 28" at the outer turn).

secondary coil: about 37 mH ( 660 turns of # 16 AWG double coated
                       magnet wire on a 12" X 40" sonotube form - about 38.5"
                       winding length)

Terminal
capacitance:   approximately 30 pFD (9" X 30" spun alum toroid - from
                      the last toroid bulk buy)

primary
capacitor:       a commercial High Energy pulse capacitor unit consisting
                     of 12 identical 27.5 nFD, 42 kV rated caps in one 3" X 5"
                     X 25" long unit and externally bussed for 2 seried sets 
of
                     6 paralleled units for a total value of 82 nFD at 84 kV.

System is RF grounded and produces 9 to 10 ft. sparks at around 7 to 8
kVA input. 

Confused,
David Rieben