RE: GP-87 Triggered Spark Gap for Sale

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "john cooper" <tesla-at-tesla-coil-dot-com> 

Hello All:

Is no one interested in acquiring a new EG&G GP-87 Triggered Spark 
Gap?  Last chance before I see about working it into a project.  Also, I 
also have an older but top of the line Gamma Ray Survey Meter by Precision 
Radiation Instruments.  Near mint condition.  The 'Royal Scintillator' 
Model 118 is both a rate and scaler meter, very sensitive and used for 
airborn and vehicle surveys.
http://www.tesla-coil-dot-com/ForSale.htm
John


---------- Original Message ----------------------------------
From: "Tesla list" <tesla-at-pupman-dot-com>
Date:  Sat, 29 May 2004 06:33:26 -0600

 >Original poster: "Tristan Steele" <ozonejunkie-at-westnet-dot-com.au>
 >
 >Hi All,
 >
 >Just yesterday, we had an induction coil running at a high frequency
 >with a spark gap of about 1.5cm.  Known to be the HV freak in the class,
 >the teacher let me do the demo of just creating sparks.  I managed to
 >get about 3" sparks. :)  I then closed the gap right down, and with an
 >arc running through the gap, placed a bar magnet beside the arc.  There
 >was a very distinct bend in the arc, and if the magnet polarity was
 >reversed, the arc bent the other way.  I may be able to get some photo's
 >of this, but no promises.  So, yes I believe that a magnet has an effect
 >on an arc.  However, there is no effect on a spark.  I also tried this;
 >just demonstrate the large amount of ionized air in the gap.
 >
 >
 >Tristan
 >
 >
 >
 >-----Original Message-----
 >From: Tesla list [mailto:tesla-at-pupman-dot-com]
 >Sent: Saturday, May 29, 2004 11:19 AM
 >To: tesla-at-pupman-dot-com
 >Subject: Re: magnetic fields in spark gaps
 >
 >Original poster: "Antonio Carlos M. de Queiroz" <acmdq-at-uol-dot-com.br>
 >
 >Tesla list wrote:
 >  >
 >  > Original poster: sean <sean-at-nc.rr-dot-com>
 >  >
 >  > If I put the sparkgap in a strong magnetic field.  Would this improve
 >  > quenching?
 >
 >Some say that yes.
 >I tried to observe what happens with a DC spark from an electrostatic
 >machine. What I could observe was absolutely no effect, even with
 >magnets so strong that I can't separate two of them without tools.
 >With a continuous -strong- arc, the magnetic field may spread the arc
 >in two opposite directions (with AC current), contributing to its
 >dissipation. But I still have to see this actually happen.
 >Would someone have a picture showing this kind of effect? Or all is
 >really just talk?
 >
 >Antonio Carlos M. de Queiroz
 >
 >
 >