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

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

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
 >
 >
 >
 >