[Prev][Next][Index][Thread]

Re: Sonderman saga - Tuesday

---------- Forwarded message ----------
Date: Wed, 1 Oct 1997 14:07:18 -0600
From: zambelli-at-mail.iolinc-dot-net
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Sonderman saga - Tuesday 

> Date:          Tue, 30 Sep 1997 22:17:05 -0600 (MDT)
> To:            tesla-at-pupman-dot-com
> Subject:       Sonderman saga - Tuesday 
> From:          Tesla List <tesla-at-pupman-dot-com>

> 
> 
> ---------- Forwarded message ----------
> Date: Tue, 30 Sep 1997 16:22:39 -0400 (EDT)
> From: Esondrmn-at-aol-dot-com
> To: tesla-at-pupman-dot-com
> Subject: Sonderman saga - Tuesday
> 
> I removed the secondary from the stand/primary/setup today.  I drilled a .75"
> diameter hole in the bottom of the well glued in disc.  Soldering wires to a
> small 12v lamp, I inserted the light into the secondary to accertain its
> condition.  Looks just like new.  Clean and unscathed.  No signs of carbon
> arcing or shorting inside.
> 
> I'll keep looking I guess.
> 
> Ed Sonderman
> 
> 

	I had the exact same problem you have. My system uses a 100:1 1.5 
kva potential transformer and a .031uf primary cap. When I first set 
the system I put an arc welder in series with the primary of the 
transformer. As I turned the voltage up on the coil I noticed it was 
zooming up way too fast. With 25v out of the variac the actual 
voltage to the primary of the transformer was nearly 70v. My rotary 
spark gap fired erratically and the output of the coil was poor. The 
voltage and current to the primary of the PT were going nuts. The 
voltage would fluctuate between 25v and 70v and current consumption 
varied accordingly. I quickly gave up on using the welder.
	Next I put a 3 ohm resistor in place of the welder. The operation of 
the coil was then perfectly normal. I saw no resonant rise as I did 
with the welder and the rotary fired normally. I didn't like losing 
heat in the ballast resistor so I removed it. The coil ran much 
better with no current limiting at all. It does not draw excessive 
power and the spark gap works fine.
	I would recommend that you remove the inductive ballast from the 
circuit. I don't use a pole pig, but my PT runs perfectly with no 
current limiting. If your system is properly fused the worst thing 
you can do is blow a fuse if you rotary or safety gaps power arc. You 
could also try using a few ohms of resistance in place of the welder. 
If you system is in tune and everything looks good I don't see 
anything else but the welder that could cause your problem.

Joe Zambelli