Re: DC power supply again

From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Monday, August 25, 1997 4:26 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: DC power supply again

Hi Greg,
         Would you mind telling us the Lp, Cp and Vpk you were using 
please? Congrats on your first firing :) I only wish I were living in 
the States.


> From:   Greg Leyh[SMTP:lod-at-pacbell-dot-net]
> Sent:   Thursday, August 21, 1997 4:00 PM
> To:     Tesla List
> Subject:    Re: DC power supply again
> Hi All,
> The new 120kW secondary winding is finished, and weighs in
> with the following specs:
> Diameter - 37"
> Winding Length - 154"
> # of Turns - 770
> Lsec - 0.13H, at 60Hz
> Fsec, no toroid - 52.66 kHz
> Fsec, w/ 96" toroid - 41.25 kHz
> As a preliminary 'proof-of-concept' test, I installed the prototype
> winding on the existing 50kW primary base, and ran it at around 38kW.
> Much fun was had by all, and a perfectly good 3-piece suit was
> destroyed... pictures are forthcoming on the Image List.
> I positioned the control console 35 feet away from the coil axis,
> which turned out to be not quite far enough.
> According to witnesses, one of the wild arcs connected with the top
> corner of the control console, 12 inches from my hand!  I remember
> seeing a flash and some metal sparks fly off the back of the console,
> but I was skeptical since I never actually saw the arc itself coming 
> at me.  However, a flaming control relay inside the console and a 
> blurry photo that someone snapped did help to confirm my suspicions!
> The sec winding seemed to work OK, so now the design for the primary 
> and the HVDC resonant charging circuitry can proceed.  Hopefully
> we will be able to do a full 120kW test in late October.
> -GL