RE: Some newbie questions

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

Original poster: "John H. Couture" <couturejh-at-mgte-dot-com> 


Aaron -

Whatever you use for the protection circuit it should be connected directly
across the terminals of the NST for the best protection. I use #12 AWG bare
copper wire with a 3/8" loop at on end. I connect these to the hot terminals
of the NST. I connect the same wire with loop to the NST enclosure ground of
the NST. The spacing between the two loops is about 3/8" for 7500 volts. I
have never lost a NST with this type of protection. You will know when they
work because if there is a voltage spike in the circuit they give a loud
bang and a bright spark between the loops. Each hot terminal of parallel
NSTs should have these #12 AWG protection loops.

John Couture

-------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, January 07, 2004 1:09 AM
To: tesla-at-pupman-dot-com
Subject: Re: Some newbie questions


Original poster: "Aaron Aab" <striker754-at-earthlink-dot-net>

Is there a cheaper protection circuit I can use? Minus the capacitors I dont
even have 60 bucks into this.

Also, can you hook NSTs in series for more voltage? or just parallel for
more amperage? will a 7500V / 30mA transformer work decently until I can get
another bigger one? My coil is 30.5" / 6.25" and a 15 turn 6ga copper
primary.

Also does anyone have any info on Microwave transformers? Those look like a
good cheap alternative, are they reliable?


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, January 06, 2004 6:04 PM
Subject: Re: Some newbie questions


  > Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
  >
  >
  > Chokes may work but in some cases they resonate with the stray
capacitance
  > in the NST secondary and this, of course, will blow your NST very
rapidly.
  > Unless you have a good storage scope with HV probe to verify this I would
  > not chance a choke as the sole source of protection.
  >
  > It's best to use the full protection circuit unless you have a cheap
source
  > of NST's.
  >
  > The lower end of the sec can go inside the PVC (after it's well treated
with
  > Glyptal) and exit via a 1/4-20NC brass stud.  Use a baffle 4-5 inches up
in
  > both ends (1/4 inch acrylic disk).  The top should remain outside of the
  > tube.  Spacewind the last 4-5 turns with some plastic fish line ---
remove
  > later as the turns are drying.
  >
  > Dr. Resonance
  >
  > Resonance Research Corporation
  > E11870 Shadylane Rd.
  > Baraboo   WI   53913
  > ----- Original Message -----
  > From: "Tesla list" <tesla-at-pupman-dot-com>
  > To: <tesla-at-pupman-dot-com>
  > Sent: Tuesday, January 06, 2004 8:54 AM
  > Subject: Some newbie questions
  >
  >
  >  > Original poster: "Aaron Aab" <striker754-at-earthlink-dot-net>
  >  >
  >  > Hey guys!
  >  >
  >  > Building a coil in my garage, and have a couple questions.
  >  >
  >  > Can I drill a hole in the pvc pipe and run the 2 ends of the secondary
  > coil
  >  > inside the pipe to a lug in the caps and then use a bolt to exit the
pipe?
  >  >
  >  > Does everything needing to be grounded go to the same ground rod?
Strike
  >  > rod, secondary coil, etc?
  >  >
  >  > Are there any cheap protection I can use to protect the NST? I don't
want
  >  > to spend 50 bucks worth of stuff for that one protection circuit. Will
a
  >  > safety gap, and 2 chokes work well? Chokes are just magnet wire
wrapped
  >  > about 100 times around a pvc pipe correct?
  >  >
  >  > Thanks a bunch!
  >  >
  >  > Aaron
  >  >
  >  >
  >  >
  >
  >