This 9 W amplifier with transistors from the 60's was found in documentation of the time. The output transistors must be mounted on heat radiators and the power supply is included.
The transistor can be a modern equivalent and the transformer is the type of output found on an...
The output voltage of this unit is approximately 1.4 V less than that of the chosen zener. The...
We found this circuit in an English publication from the 80's. The circuit uses current components like...