RE: Three phase Jacob's Ladder exists in Santa Barbara (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 4 Jun 2007 11:51:50 -0700
From: Jim Mora <jmora@xxxxxxxxxxx>
To: 'Tesla list' <tesla@xxxxxxxxxx>
Subject: RE: Three phase Jacob's Ladder exists in Santa Barbara (fwd)

Hello All,

I was interested in a three phase Jacobs Ladder earlier. I believe it was
Gerry who mentioned he has seen one. I am in the process of tweaking a 3 ton
military trailer for demos (7x11 foot). I have a way over built
Stamford/Newage 18KVA 480V 3p generator (probably can do twice that for demo
purposes) powered by direct coupling to a Isuzu 240C 4 cyl Diesel engine.
This to a 480 to a 208 delta/wye transformer - this is to drive a three
phase radar transformer powered 24KV DC coil. This will be controlled by a
3p variac and a DC variable speed rotary gap. If I were to connect in front
of the 6 pulse diode rectifier, I was curious how a three leg JL would work.

Gerry said the flame would climb to converge from a triangle at the top -
seems pretty neat.

Other stuff is a rack mount 9KJ/sec, 3p 50KV cap charger ( I have 2 of the
giant Geek Group caps from Berkley) for an exploding 8' wire demo. The
experiment will be 4 different wire types- silver, copper, piano wire, and
magnesium.

I am looking at bringing up a second 24KVA genset and a 1p ASRG 20" coil,
perhaps latter. The trailer is .25" steel plate making reconfiguration
reasonably easy (with the use of an engine crane).

Regards,
Jim Mora



-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx] 
Sent: Sunday, June 03, 2007 4:14 PM
To: tesla@xxxxxxxxxx
Subject: Three phase Jacob's Ladder exists in Santa Barbara (fwd)

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 3 Jun 2007 15:43:38 -0700
From: Austin Richards <austinrichards@xxxxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Three phase Jacob's Ladder exists in Santa Barbara

I have a three-phase Jacob's ladder that was given to me.  It was built by a
friend named Richard Cossel back in 1999 after we had discussed the idea.
It is about 6 feet long with gaps of about 1.5 inches at the top.  I have
fed it from three NSTs connected to three phase power. The arc that forms
looks like the inner portion of a Mercedes medallion, like the letter Y.
When I powered it up, I had the transformers wired in delta on the high
side.  All the centertap grounds were tied together.  The primaries of the
NSTs were wired in Y.

 

I don't have the NSTs anymore, or a three-phase source, other than renting
generators.  I'd like to build a larger version of it sometime.  Now that we
have a quarter acre lot, that seems more likely to happen.  I made a 35kW
Ladder back in 2001 for Burning Man.  it was 8 feet tall, 14 inch gap at the
top.  Worked well and the sound is excellent.

 

Austin

www.drmegavolt.com