all Gain Stages AMP

[Stee]

hello

see this new project with MPSA transistors
and Voltage gain also in final devices as IGBT

[lineup]

looks like it will work well
maybe even be very good
.. depends on your used transistors and current levels

2 resistors serve no good purpose:
those two at most far right = from POWER Transistors collectors.
The only thinkable purpose, that they may do,
is to reduce Max Output current = some protection.
Other wise these 2 resistorswill only make output stage
work more BAD

Lineup regars

[Stee]

really at the moment i have tested FET parallel with IGBT
works very good
(k170 and J74 + GT20D101/201)

THE PROBLEM is found an equivalent circuit
because this TOSHIBA devices are hard to buy