For a TNT 200 clone, the SuperTex MOSFETs are tough to find nowdays.
Hafler eventually absorbed Accoustat.
Jim Strickland, who designed the TNT200, refined the concept Trans Nova concept and applied it to Hafler models 9505, 9303, and perhaps some others.
The service manuals (which contain schematics!) may still be available at the Hafler web site - I saw schematics there years ago.
The newer designs are more easily duplicatable with currently available parts.
But they still used lateral MOSFETs at the output. I think you'd be asking for trouble (bias control, larger capacitance, no true complementary pairs available, etc.) trying to use vertical MOSFETs there. But who am I to say ... You might discover something, so have at it.
I've heard the 9505 driving some Soundlab Pristines - very nice
I'm actually surprised more people aren't cloning these designs ....
mlloyd1
sasha said:
I am planing to make Acoustat TNT 200 clone. That amp is specifically
designed for driving electrostatics.
Anyway, after driver board is done I will try to experiment
with cheap Mosfets and include source resistors in design.
If it explodes no big deal, it is only couple of dollars.
You said bias problems. What about it? It won't be stable or what?
Regards.