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

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

Original poster: "Jolyon Vater Cox by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>

Terry,

Sorry but I think there is that little thing called "saturation" to be
considered here.  If you pump too many volts into a transformer you will
reach a point where the core will no longer be able to absorb the increasing
levels of magnetic flux;  the primary current will then soar and the primary
winding will burn out.

  Jolyon
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, May 15, 2003 6:43 AM
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
 >  >
 >  >
 >  >
 >  >
 >
 >
 >