Today i built a stereo class A amplifier using FGA25N120 IGBTs, all it took was three resistors and a capacitor.
Heres a video: YouTube - IGBT Class A Amplifier
This is the first solid state class A amp i ever built.
Heres a video: YouTube - IGBT Class A Amplifier
This is the first solid state class A amp i ever built.
The circuit is very similar to the pass zen lite circuit.
The sound is decent, can't really tell until i've gotten rid of the hum.
The sound is decent, can't really tell until i've gotten rid of the hum.
I have now replaced the igbts with mosfets, more exactly IRF3205's.
Schemo:
It seem to sound better now with mosfets, bias current is around 3.6A per channel with an input voltage of about 14V.
Schemo:

It seem to sound better now with mosfets, bias current is around 3.6A per channel with an input voltage of about 14V.
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