They are plentiful and inexpensive. I had a mobile audio amp way back when and it put out 90 watts per channel. Truly thunderous inside of a 1965 Dodge Carryall. Other than the seats there was no upholstery, carpet, or other sound deadening surfaces.
The point is that the environment was less than ideal for electronics. That amp worked for over ten years with no problems and it had Motorola MJE6040 Darlington transistors.(I think that's the part number.)
With the much higher gain available...
Why not use Darlington transistors?
The point is that the environment was less than ideal for electronics. That amp worked for over ten years with no problems and it had Motorola MJE6040 Darlington transistors.(I think that's the part number.)
With the much higher gain available...
Why not use Darlington transistors?