Darlington amp built on heat sink.

[markw51]

There's a Youtube channel where a guy makes clever little audio amps using one or two transistors with no circuit board. I've attached one of them. Interested in hearing your thoughts. The name of the channel is Share Tech Creative. English is not his first language.

 

[Osvaldo de Banfield]

What about pops at power on or off? The output cap charging and discharging trough the collector load may be awesome.

 

[JMFahey]

There's a Youtube channel where a guy makes clever little audio amps using one or two transistors with no circuit board. I've attached one of them. Interested in hearing your thoughts. The name of the channel is Share Tech Creative. English is not his first language.

Not too practical but interesting as a classroom example.

 

[Douglas Blake]

That circuit is pretty typical of what you would find in a Bullhorn.