 SSTC eating fets
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Experimentonomen
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Sun Aug 05 2007, 01:59PM
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Registered Member #941
Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
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I tried to replicate WaveMan´s Armstrong SSTC and just managed to get a streamer in a light bulb when the fet descided to take a smoke break. I first tried a STE53NC50 but it took only seconds to heat and short out despite a heatsink that barely got warm. Then i tried an IRFP460, added a variable cap and found a point where a streamer lit in a automotive light bulb, shortly after the 460 poofed, leaving a nasty smell.
These two fets seemed like a quite not so good choice. Which fet would be good choice ?
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Marko
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Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
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Hey, welcome to forum!
Armstrong oscillator may be troublesome with mosfet's. I think gate will definitely require clamping, either with high-power zener or a string of diodes to keep it working sort of class C.
But I don't think the bother is worth of building a simple bridge.
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