Re: Some newbie questions

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

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

I have the wire in the bottom of the tube, but in the top I only have a bolt
head. Will the baffles prevent any damage from being done?


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, January 08, 2004 11:41 AM
Subject: Re: Some newbie questions


 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: Esondrmn-at-aol-dot-com
 >  >
 >  > In a message dated 1/6/04 11:58:40 AM Pacific Standard Time,
 >  > tesla-at-pupman-dot-com writes:
 >  >
 >  > >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
 >  >
 >  > Aaron,
 >  >
 >  > The conventional wisdom is to not run the secondary wires into the
center
 >  > of the form.  This just makes it easier to flash over inside from top
to
 >  > bottom.  And you usually won't notice this until it has formed carbon
 >  > tracks in the plastic.
 >  >
 >  > I use at least two grounds on my coils.  The variac case and ac line
filter
 >  > go to line ground.  All other grounds go to the ground rod, i.e. bottom
of
 >  > secondary, nst case, strike rail and center electrode of the safety
gap.
 >  >
 >  > I only use a safety gap and 25 watt 1,000 ohm resistors in series with
each
 >  > H.V. lead for protection and have not had any problems with this.  Do
not
 >  > use chokes as it may cause resonance problems with the nst and do more
harm
 >  > than good.
 >  >
 >  > Ed Sonderman
 >
 >
 > I agree completely about anything inside the form.  Although I've never
 > worked with anything bigger than a 15 kV, 60 ma NST I learned early on
 > that such things as anchoring the secondary windings by threading them
 > through holes in the form, or attaching them to metallic screws
 > extending through the form, was almost certain to produce internal
 > arcing and form damage.  I now usually use nylon screws threaded through
 > the form and haven't had any trouble with that.
 >
 > Ed
 >
 >