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Re: Wiring questions



Subject: 
        Re: Wiring questions
  Date: 
        Fri, 14 Mar 1997 13:01:14 -0500 (EST)
  From: 
        Esondrmn-at-aol-dot-com
    To: 
        tesla-at-pupman-dot-com


In a message dated 97-03-14 02:53:14 EST, you write:

<< Nathan,
 
 >From the transformer high voltage bushings, connect one lead to the
primary
 (I use the inside primary lead) and connect the other to one side of
your
 capacitor.  Now connect a flexible lead from the other side of the
capacitor
 to the primary.  I fashion a spring loaded clip lead for this with some
 curved copper pieces soldered cross ways on the clips so I will clip on
the
 primary tubing to allow easy tuning.  Now the spark gap is connected
right
 across the high voltage transformer but physically close to the
capacitor
and
 primary.  The leads from the transformer can be long but the leads
connecting
 the gap to the capacitor and to the primary should be as short and as
beefy
 as you can accomplish.
 
 I also place a safety gap located at or near the transformer with the
center
 contact grounded to your main RF ground.  The base of the secondary
also
goes
 to this main RF ground - with either heavy solid wire or something like
2.0"
 wide aluminum or copper flashing.  This RF ground should be a separate,
 dedicated ground and not your house wiring ground.  Set the safety gaps
to
 about .35" on each side and adjust from there so it just barely fires
when
 the coil is running.  This will protect the transformer.  You should
also
use
 some inductance and resistance in series with each leg of the
transformer,
 located right at the output of the transformer.  My inductors came out
a
 little on the low side (about 1 mh each), you would like to have about
5 mh
 here.  I am also using 3,000 ohm 25 watt resistors in series with each
 inductor.
 
 Ed Sonderman 
  >>
Nathan,

As Bob pointed out, yes the center tap (case) of the neon sign
transformer
should be connected to the main RF ground also.  I forgot to mention
that.

Ed Sonderman