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Registered Member #4152
Joined: Thu Oct 20 2011, 10:18PM
Location: The Russian Federation
Posts: 108
hi coilers:) I present to you indestructible armored tesla coil;DDDDDDDDDDDDD scheme is so simple that almost no details in conventional spools of this type are ballast current limiters here it is not present and the weak transistors without breaker for long duration totally annihilate;D however, this only works reel interrupter;)
just now I'm just starting to build this type of coil, and so I want to get 150-300cm streamer I use a semiconductor FGH60N60SMD
coil while it can operate from 170- 190VAC to do if it breaks above the primary winding
Registered Member #333
Joined: Mon Mar 20 2006, 06:02PM
Location: Czech Republic
Posts: 45
Hi dude, your 1st circuit reminds me what I was trying about 10 years ago! Here's my single FET SSTC http://rayer.g6.cz/teslatr/sstce.htm#FETTC But in my case I used feedback coil and it didn't work well. I would fear about FET and zeneres by this rude base feed but you made it. Results are really impresive! I think this ISSTC is the best with price&simplicity / power radio that I have ever seen :)
BTW what about MOSFET drain-source voltage spikes? Did you tried to attach scope there? It kick ass your MOSFET hard but it behaves like zener diode and clamping it - this clamped energy is dissipated as heat of course. I can see you run very short bursts. I guess if you will keep run it for a minute at full power it blows off... This can be solved by class E topology (just add some capacitor) but it would require MOSFET for about 4x Vds rating of power supply which is hard to get...
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Mega big Russian single transistor tesla coil
a huge bunlde of TVSes for example? 
