Re: [TCML] Jacob's Ladder

[DC Cox <resonance@xxxxxxxxxxxx>]

It would not work as well.  Multipliers multiply potential but reduce
current.  It's current that puts the flame in a climbing arc.

Dr. Resonance




On Thu, Feb 5, 2009 at 8:36 AM, Ryckmans, Thomas <Thomas.Ryckmans@xxxxxxxxxx
> wrote:

> Could one use a voltage multiplier along with a single MOT to power a
> JL? The capacitors multiplier would reduce the current...
>
> With the new recycling laws in the UK, finding MOTs is getting harder
> and harder...
>
> Cheers
>
> Thomas
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of DC Cox
> Sent: 03 February 2009 00:15
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Jacob's Ladder
>
> Yes, it will try to draw approx 35 Amps and either blow your mains fuses
> or
> damage the MOT.  If you fuse it for a higher current it will
> fry the MOT in short order.
>
> Best to set up two identical MOTs (so no circulating currents), then
> connect
> HV secs in series.  Use a separate power reactor on each
> primary side and connect to two separate 120 VAC circuits (you have to
> test
> to make sure you are not trying to operate both MOTs off the same
> circuit or they will draw too much current and blow your fuses or
> breakers.
>
> I use a separate power reactor on each one and set the current
> (controlled
> by number of windings) to approx 15 Amps (takes 300 turns on a 1.5 x 1.5
> x
> 14 inch long M-50 core.  Then draw is 15 Amps off each separate circuit,
> so
> total is 30 Amps at 120 VAC for a nice 3.6 kW climbing arc that is a
> very powerful flame.
>
> Dr. Resonance
>
>
>
>
> On Mon, Feb 2, 2009 at 3:59 PM, Thomas Ryckmans
> <thomas.ryckmans@xxxxxxxxxx>wrote:
>
> > What happens if you don't have current limiting on a MOT-powered
> Jacob's
> > ladder? The current flowing through the spark keeps going up until the
> MOT
> > fails?
> >
> > BTW there was some plans about a "Gabriel's electrode" here:
> > http://www.repairfaq.org/sam/jacobs.htm
> >
> > >From Big Clive
> >
> > Would this help power a JL with MOTs? Clive - I hear your comments
> about
> > MOTs loud and clear - just asking
> >
> > Thomas
> >
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf
> > Of bartb
> > Sent: 01 February 2009 03:07
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] Jacob's Ladder
> >
> > Could also consider a GM HEI coil trigger as was done with sparks gaps
> > in 2000 and 2001 (in place of the NST).
> > Bart
> >
> > G Hunter wrote:
> > > Jeremy,
> > >
> > > Don't mix NSTs and MOTs.  It's a formula for failure at best, and
> > destruction of your NST at worst.
> > >
> > > Your parallel idea, for example, will simply short out the NST
> output
> > across the relatively low impedance MOT secondary winding.  This will
> > prevent the NST from developing sufficient potential to start your JL,
> and
> > I
> > have no idea what the MOT output will do to the NST secondary.
> > >
> > > I understand your problem--the NST can self-start a JL, but the
> wimpy
> > current doesn't make much of a display.  On the other hand, the MOT
> can
> > create an impressive flaming arc, but the JL rods must be almost
> touching
> > before the MOT will strike an arc.  With such a close spacing, the arc
> > won't
> > climb.
> > >
> > > Have you considered a 4-pack MOT stack?  Four MOTs with their
> secondaries
> > in series will develop roughly 8kvac.  A 5th MOT can be used as a
> series
> > reactor to limit the wallplug current.
> > >
> > > A simpler but more expensive solution is to parallel several NSTs
> for
> > more
> > current.
> > >
> > > Cheers,
> > >
> > > Greg
> > >
> > >
> > >
> > >
> > > --- On Sat, 1/31/09, Jeremy <jeremy_runescape@xxxxxxxxxxx> wrote:
> > >
> > >
> > >> From: Jeremy <jeremy_runescape@xxxxxxxxxxx>
> > >> Subject: [TCML] Jacob's Ladder
> > >> To: "TCML" <tesla@xxxxxxxxxx>
> > >> Date: Saturday, January 31, 2009, 11:21 AM
> > >> hey all, i just wanted to ask if it is possible to create a
> > >> jacob's ladder circuit with a NST and MOT in parallel,
> > >> the NST to supply the HV for improved arc initiation, and
> > >> the MOT for increased amperage for larger, more sustained
> > >> arcs. will the NST secondary simply fry or will it's
> > >> shunting and inductance protect it? and what about the
> > >> secondary insulation for the MOT? am i also right to assume
> > >> that the current *should* flow through the arc and not the
> > >> MOT secondary (thus sparing it's insulation) cos of the
> > >> secondary's inductance?
> > >>
> > >> thanks,
> > >> jeremy
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