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Re: New Testing
From: Charles Brush[SMTP:cfbrush-at-interport-dot-net]
Sent: Thursday, September 11, 1997 9:47 AM
To: Tesla List
Subject: Re: New Testing
Hi Ed,
Sorry to hear that you are still having problems with your system. As
we've discussed in private email, my system is practically identical to
yours. I too am running a 6" coil with a 5kVA pig (most of the time!),
225amp arc welder without resistors, Superior Powerstat, rotary gap (4 gap
series unit Ed Wingate just built for me), and RG213 HV feed cables. I
just added a pair of .05uF 50kV pulse caps in series for .025uF tank
capacitance...same as you. Our systems couldn't be much more similar. My
tank circuit interconnects are a combination of heavy copper bussbar and #1
welding cable. I am not running any static gaps in series with my rotary,
and the rotary fires very smoothly with the variac at only about 2/3 max.
At 14.4kV I would think that your .19" total gap would be fine. Then
again, it couldn't hurt to just throw a jumper across those static gaps and
take them out of the circuit as a test.
Questions:
-Are you setup with the gap or the cap across the HV lines from the pig?
-Any chokes or bypass caps? I seem to remember some in a photo of your
setup. Have you tried taking these out to see if something is shorted?
-How is voltage out of the variac to the pig?
This must be frustrating, particularly after having waited so long for that
CP cap to come back. It's a puzzle indeed.
Charles Brush
http://www.foundrygroup-dot-com
(no photos of the new setup & gap yet...soon...I'm in the process of
rebuilding my site!)