Re: Laser Power Supply Components

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Laser Power Supply Components
From: Tesla List <tesla-at-stic-dot-net>
Date: Wed, 6 Aug 1997 21:33:36 -0500
Approved: tesla-at-stic-dot-net

From: 	Rscopper-at-aol-dot-com[SMTP:Rscopper-at-aol-dot-com]
Sent: 	Wednesday, August 06, 1997 3:44 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Laser Power Supply Components

To the higher power nuts:

I just disassembled (Jonny5) a CO2 cutting laser power supply that was being
scrapped due to the laser being trashed.  Here's what I scrounged:

1)  Transformer - logo TECO 208,215,240VAC input, no output on the xformer,
but the power supply controller was variable from 1.5 to 3KVDC.  It was wired
with...
2)   4 diodes labled KHP6, EDI 8438 can anyone cross these??  They were in a
full bridge configuration so I assume the xformer is about 3KVAC.  These
diodes are big - 1x1x5inches 12 AWG connecting them.
3)  2 GE C152P 125A 1200V SCRs were used along with some 1foot long 225W
1,25,and 1K resistors for a pulsed mode operation.  
4)  2 chokes(?) were in line made from about 25lbs of 8AWG wire each - the
only core was a 1/2inch bolt holding them down. One had nice 1/4inch circles
of phenolic(sp) - could be used for rotary gaps??
5) A cool high current switch that looked like an old starter motor relay
only 115VAC operation and poles made of 1/2inch rods of tungsten(?) and a
plate washer for center pole.

The xformer was protected by a dual 30A breaker, so I'm guessing it ran at
about 20A.  The secondary wire looks to be as thick as 23AWG wire, so it
should be able to put out some good power.  It weighs in at about 125lbs!
dimensions are 7X10X12. The xformer was open to air with only a layer of
enamel on it.

Has anyone used this type of transformer before for a TC???  Can anyone get
specs on these diodes (they don't cross ref in my books)??  

Scott C