The integrated circuit of this amplifier is not very common today. The output transistors can be TIP31 and TIP32 in heat radiators. The circuit is from the 1977 National Semiconductor Audio Handbook.
Recommended by 90s a Radio Electronics, this unit uses a transformer with a 70 V x 5 A secondary,...
This high voltage regulator uses only two passive components. The output is 100 V, but replacing...
This circuit detects magnetic fields by approximation, using a Hall sensor. The components are...