Re: conical secondaries (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 03 Jul 2007 00:00:40 +0000
From: david baehr <dfb25@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: conical secondaries (fwd)


As far as conical coils go,      let say I now have a helical coil  4"
dia x 24" winding lenght with #26 wire,

   then would  a  cone of the same hight , but  is 6" at the bottom, and
2" at the top (same wire)   be the same wire lenght ??  

    sa long as the hight is the same  , and the top & bottom dia  add up
the same   4+4=8 ....6+2=8      does that make sence ??  My math is way
bad ,excuse please

 

               Thanks,dave

________________________________________________________________________________

      From:  "Tesla list" <tesla@xxxxxxxxxx>
      To:  tesla@xxxxxxxxxx
      Subject:  Re: conical secondaries (fwd)
      Date:  Mon, 2 Jul 2007 14:23:47 -0600 (MDT)
      >
      >---------- Forwarded message ----------
      >Date: Mon, 2 Jul 2007 10:00:10 -0700 (PDT)
      >From: Mike <megavolts61@xxxxxxxxx>
      >To: Tesla list <tesla@xxxxxxxxxx>
      >Subject: Re: conical secondaries (fwd)
      >
      >Hi all,
      >       My guess is that the conical shape would have one
      benefit.  The
      >E-field shape created by such geometry would tend to repel
      the streamers
      >up and out, resulting in less chance of primary
      strikes.  Aslide from
      >that, I can't see much advantage and I can imagine that the
      self
      >capacitance of the coil would be increased compared(and
      hence lower
      >frequency given all else equal)  to a helical coil with the
      same length of
      >wire and a diamter equal to the place on the cone where half
      the wire is
      >above and half below that turn.  I'm sure someone like Bart
      could analyze
      >such a comparison...along with mapping of the E-field to see
      if my notion
      >is valid.  I don't have such programs on this puter.
      >   Mike
      >
      >
      >
      >
      >   In a message dated 6/15/07 10:19:45 P.M. Eastern Daylight
      Time,
      >tesla@xxxxxxxxxx writes:
      >
      >The  advantage of a conical coil is that it can contain more
      power
      >   (current
      >times potential) before breaking out than if a pure flat
      spiral or
      >   pure
      >solenoid coil were used.
      >
      >Why? I thought that breakout was a function of the top load
      geometry.
      >
      >
      >So if  you are trying to build a small coil to
      >handle the maximum power, the  conical secondary is the way
      to go.
      >
      >David W. Thomson
      >
      >
      >
      >
      >Matt D.
      >
      >
      >---------------------------------
      >Boardwalk for $500? In 2007? Ha!
      >Play Monopoly Here and Now (it's updated for today's
      economy) at Yahoo! Games.
      >
      >


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