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Registered Member #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
This is my first SSTC.It's based on steve's MicroSSTC. It's powered by 20V AC(full wave rectified)
But I have problem installing a topload.After I install a topload, spark disappeared,power transformer overload and I was shocked by the metal casing of my oscilloscope.
I also don't know how to install a discharge point.The temperature can melt copper,needless to say any nearby plastic.Of course I can't use metal.Maybe I should try glass?
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
è¬æ˜•å“² wrote ...
This is my first SSTC.It's based on steve's MicroSSTC. It's powered by 20V AC(full wave rectified)
But I have problem installing a topload.After I install a topload, spark disappeared,power transformer overload and I was shocked by the metal casing of my oscilloscope.
I also don't know how to install a discharge point.The temperature can melt copper,needless to say any nearby plastic.Of course I can't use metal.Maybe I should try glass?
Hey
Your single MOSFET power stage is simply too weak to drive a coil with a topload when it is also only powered by 20VAC, you will properly need a larger heat sink on the MOSFET if you will up the voltage enough for some more serious sparks.. Did you even have a breakout point on the topload?
What BPS are you running at? The interupter frequency..
A piece of solid 1.5mm^2 copper wire should do fine as breakout point, just make sure its needle point in the breakout end... Makes it about 10 cm long, should be long enough for it to dissipate some heat before melting what you secured it to, toploads of metal will absorb some heat too.
Registered Member #1412
Joined: Thu Mar 27 2008, 04:07PM
Location: Taipei Taiwan
Posts: 278
Mads Barnkob wrote ...
Hey
Your single MOSFET power stage is simply too weak to drive a coil with a topload when it is also only powered by 20VAC, you will properly need a larger heat sink on the MOSFET if you will up the voltage enough for some more serious sparks.. Did you even have a breakout point on the topload?
What BPS are you running at? The interupter frequency..
A piece of solid 1.5mm^2 copper wire should do fine as breakout point, just make sure its needle point in the breakout end... Makes it about 10 cm long, should be long enough for it to dissipate some heat before melting what you secured it to, toploads of metal will absorb some heat too.
It's running CW.No interupter.
I tried to use a small piece of copper lead as a breakout point. But I still can't see any spark.
I also want to know why I get electric shock when I touch the metal casing of my PC PSU(I once powered my coil with it) and my oscilloscope after I install a topload.
Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Well your PC PSU and your o-scope is grounded correct, if so and your ground for the TC is tied to that same ground, it just means that you are acting like a capacitor and storing some of the energy given off by the TC, then you discharge to the nearest grounded item.
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My first SSTC
