RE: VERY HIGH BPS at 6kw! 240 V into the 120 V

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

Original poster: "Terry Oxandale by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Toxandale-at-spp-dot-org>

I did it regularly with a 1.5kva oil filled PT. It was a 60:1 ratio I 
believe (7620vac high side for 127vac low side). I ran 240vac into the low 
side always, and on top of this, I ran it at 30+ amps (7.0kva). It never 
did quit on me and now it's been put to pasture as the power supply for my 
Jacobs Ladder (was replaced with a 14,400vac pig).

(un)Terry

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, May 15, 2003 12:44 AM
To: tesla-at-pupman-dot-com
Subject: Re: VERY HIGH BPS at 6kw! 240 V into the 120 V


Original poster: "Terry Blake by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
<tb3-at-att-dot-net>

Hey,

Has anyone else pumped 240 V into the 120 V winding of a pole transformer?
I was thinking about doing just that, but with a 14.4KV transformer.  Like
pump in 240 V into the 120 V to get 28.8 KV out.  Hehe.

Terry Blake

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, May 14, 2003 12:32 PM
Subject: Re: VERY HIGH BPS at 6kw!


  > Original poster: "G by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<bog-at-cinci.rr-dot-com>
  >
  >
  > >10' on 7200vac? That's very interesting. Can I trouble
  > >you to describe your coil system--primary/secondary
  > >dimensions & so forth, or else provide a link to a
  > >description? I have a special interest in low-voltage,
  > >high-current systems.
  >
  > snip
  >
  > >hi,
  > >     id have to challenge this claim of spark length with a cap that
small at
  > >7200v
  > >as the tank cap at low voltages tends to be big to make use of the large
  > >current.
  > >do you have any pics of this?
  > >i dont usually question anyone on there output but this seems houge for
the
  > >size of tank cap
  > >id love it if it were true then we could all learn something from you!
  > >cheers
  > >colin
  >
  > Hello All,
  >
  > I may have accidentally started some trouble with my statement about low
  > voltage. I forgot that I was overdriving my transformer. I just ran the
240
  > V mains supply into one side of the low-voltage winding. Sure, it
saturates
  > and makes all the lights flicker, but it got the length up! I think I was
  > making about 6 feet or so before I decided to overdrive it. The last time
I
  > ran the coil, I ballasted it at about 35 A, and got the 10 foot streamers
I
  > mentioned. Here is a list of specs from an old List email:
  >
  >
  > power supply: 7.2 kV 10 kVA pole transformer, 240 V 60 A circuit,
contactor
  > actuated
  >
  > ballast: MOT tansformer array
  >
  > primary: 21 turns 1/4" copper (designed for experimentation), 1/4"
spacing,
  > tapped at 11 (10 to 12 seem to have exactly the same performance)
  >
  > cap: Geek  MMC, 0.041 uf 20 kV, 3 strings of 11
  >
  > gap: variac controlled right angle grinder ASRG, 11000 rpm,  5 tungsten
  > flying electrodes, 1 or 2 gaps for BPS selection, plywood disk
  >
  > secondary: 8.5" dwv pvc pipe, 19.5 gauge wire, 1400 turns, 50" winding
length
  >
  > topload: 3" corrugated black drain pipe/Aluminum tape corona shield,
  > one  4" x 25"  and one 7" x 60"corrugated pipe/tape toroid
  >
  > extras: strike ring with inline 2" spark gap, 40 A emi filter
  >
  >
  > Gregory
  > --
  > "Without ZIM, I am lost."
  > GeekID#-1229
  > http://thegeekgroup-dot-org
  >
  >
  >
  >