Solid State VTTC work

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Sundog <sundog@xxxxxxxxxxxx>

Hi Terry,

Please forward this to the List and post links to the photos so everybody 
can see :)  Many thanks!

http://hot-streamer.com/temp/Image00005.jpg

http://hot-streamer.com/temp/Image00010.jpg

http://hot-streamer.com/temp/Image00013.jpg

Hi All,


I worked on the modulator section of the solid state Vacuum Tube Tesla Coil 
today.  Got the half bridge debugged (blew up a DMM in the process), and 
here's the output from it (properly running, but not quite enough driving 
power to the FET's, note the slow rise/fall times.  Need to work on that.

Nothing special, and the only part not shown are the 3 8.2k, 25W 
resistors.  The resistive divider goes between the negative leg and joint 
between the FET's.  8.2k to the negative rail, 4.4k to the midpoint of the 
half bridge.  Bridge is voltage doubled 120v mains, and the modulator is 
putting out clean -166 to +60v swing.
The FET's barely heat above ambient (about 85F in the garage) after 10 
minutes.   Once I refine the controller electronics, it'll be time to make 
sparks (this time they won't come from the DMM)!

Questions?  Comments?

Shad H.