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Tank circuit layout?




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From:  Bert Hickman [SMTP:bert.hickman-at-aquila-dot-com]
Sent:  Tuesday, March 17, 1998 8:58 AM
To:  Tesla List
Subject:  Re: Tank circuit layout?

Tesla List wrote:
> 
> ----------
> From:  Zuma /or CJ [SMTP:mwise-at-ns.sosis-dot-com]
> Sent:  Monday, March 16, 1998 11:28 PM
> To:  tesla-at-pupman-dot-com
> Subject:  Tank circuit layout?
> 
> I currently run my coil with the cap across the transformer and recently
> have noticed that this is a bad thing to do. I have been trying to use
> the gap across the transformer method with no such luck. So I am asking
> for a hand on this matter. I wonder if someone can send me a diagram of
> exactly how this setup is done or direct me to some place that I may
> find a diagram? I am more than likely wiring something up wrong because
> the last time I tried my spark gap wouldn't even fire. So can someone
> please help me out here, Please...
> 
> Thanks,
> Chris


Here is a generic typical diagram for a NST-driven coil taken from the
Tesla-2 list.

   TESLA COIL SCHEMATIC                              ---------
                                                     |       | T1
                                                     ---------
                                                         O
         X1                               C1              O
                           RFC           | |             O  L2    
           O---------------||||----------| |-----        O
         ||O    |                   |    | |    |   L1   O
         ||O    |                   |           |    O   O
   -----O||O    * SG   RF           *           |--->O   O
        O||O----*---|  Gnd             G1            O   O
   -----O||O    *                   *                O   O
 0-120   ||O    |                   |                O   O
 Volts   ||O    |                   |                O   O
           O---------------||||----------------------O   O
                           RFC                           |
                                                         |
                                                      RF Gnd

       X1 = Neon Sign Transformer, grounded center tap
       SG = Safety Gaps
      RFC = RF filter chokes
       G1 = Main system (tank circuit) Spark Gap.
       C1 = Tank circuit capacitor
       L1 = Primary Coil.
       L2 = Secondary Coil.
       T1 = Toroid discharge terminal                              
      Gnd = RF Ground. 

Hope this helps!

-- Bert --