Re: SSTC Twins UPDATE :30" goal met

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

Original poster: dhmccauley-at-spacecatlighting-dot-com 

Great work Steve!  Look forward to seeing the videos.
Once I'm off the audio modulation experiements with my SSTC work, I will
once again pursue long arcs with my SSTCs.
Keep us posted!

dan




 > Hi,
 >
 > i surpassed the 30" goal by 1" today :)  The coils are just amazing to see
 > in person.  I will add a video after i get it compressed.  For now there
 > have been some nice pictures added.  All pics were at the 31"
 > point-to-point distance from the discharge points.  Enjoy!
 >
 > Steve Ward
 >
 >
 > >From: "Tesla list" <tesla-at-pupman-dot-com>
 > >To: tesla-at-pupman-dot-com
 > >Subject: SSTC Twins
 > >Date: Mon, 01 Sep 2003 02:20:16 -0600
 > >
 > >Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
 > >
 > >Hi All,
 > >
 > >Ive been working intensly on some SSTC twins.  For a brief history, look
 > >at my site :
 > >
 > >http://hot-streamer-dot-com/srward16/
 > >
 > >http://hot-streamer-dot-com/srward16/SSTC4.htm
 > >
 > >Ive basically come a very long way since i started this project.  I
 > >managed to kill 4 big mosfets from reasons unkown, but i suspect poor
 > >tuning with my free running oscillator.  Now im back to running small
 > >Mosfets, but lots of them!  Im using a dual H-bridge of IRFP260s.  At
120V
 > >input and just over 15A i get some nice 26" sparks between coils.  28" is
 > >my current best spark.  I also got an antenna driven feedback method to
 > >work very will with the twins.  This is the key to the long sparks, the
 > >coil is always in tune.
 > >
 > >Now ive got a question about twin coils.  Can the secondary coils be out
 > >of tune?  Im running the bases together, but NOT grounded.  I figured, if
 > >there was any error in Fres between the coils, the lack of ground would
 > >compensate.  Can any one explain how twins (in my situation) work as far
 > >as Fres...  My feedback can only tune to one coil, so is my other driver
 > >simply always going to be slightly out of tune?
 > >
 > >Another note, anyone going to the cheesehead teslathon this saturday can
 > >(hopefully!!!) look forward to seeing the twins doing maybe some 30"
arcs.
 > >Im etching the final PCB on tuesday and if it works like it should, the
 > >coil will be ready for action.  I cant make any promises though...
 > >
 > >Any comments or questions are WANTED ;)
 > >
 > >Steve Ward
 >
 >
 >
 >