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Re: bigger tranny?



manjinder,
 
You can overwhelm a small tesla coil oscillator circuit such as the 9kV-at-30mA
powered unit by going to a pig with no other circuit changes.  The RF
oscillatory current in the primary tank circuit competes directly with the 60
Hz current from the supply transformer for control of the gap.  It is the RF
oscillations at zero crossing at the system's spark gap which allow it to
quench properly.  If the supply transformer gets too  'stiff' from an 
impedance perspective you will end up with a flaming, mains frequency power
arcing spark gap that will not quench properly and not allow RF oscillations. 
This occurs when the transformer can deliver significantly more energy than the
tank capacitor it just charged can in phase opposition.  You could use your
powerful pig with a current limiting series impedance, but this just takes your
power level back to the region in which the 9 kV-at-30 mA transformer was running
happily.  There's no free lunch.  Bigger coils have to be designed bigger
throughout.  A modest change like adding another 9 kV-at-30 mA transformer would
probably be successful without component changes, although gap adjustment might
be necessary.
 
Robert W. Stephens
Director
AREA31 Research Facility
<http://www.area31-dot-org>www.area31-dot-org
>
> ----- Original Message ----- 
> From: <mailto:tesla-at-pupman-dot-com>Tesla List 
> To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com 
> Sent: Wednesday, April 26, 2000 16:41
> Subject: bigger tranny?
>
> Original Poster: "m0neyfromyuba"
> <<mailto:m0neyfromyuba-at-netzero-dot-net>m0neyfromyuba-at-netzero-dot-net> 
>
> hey all
>
> after 3 months of looking at tesla coils, I have to ask how bigger
> transformers would increase ur output if the tank cap, spark gap and the
> primary remain the same. Say for an instance that I have a 9 kv, 30 ma
> tranny, and I get some 2 foot sparks. If i upgraded to using a pole pig (15
> kv at 300 ma) with the same tank cap, spark gap and primary. My capacitor
> would charge and break the gap at the same voltage. would my output spark
> increase?
> how can one tell the strength of a primary?
> what factor determines this??
>
> thanks for reading
> regards
> -------------manjinder bains----------
> p.s. i live near yuba city california. I dont know of a single person that
> knows more about tesla coils than me in this city. I was wondering if any of
> you lived near by so I could form a group.
>
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