This is the power supply for the EL34 tube amplifier given in V234. This power supply supplies all necessary voltages to the circuit.
This step of high gain and high voltage supply with direct coupling is from a documentation from...
This circuit, found in a 1986 documentation, uses an optical sensor to count pulses and, in its...
The integrated circuit used in this 1986 project is uncommon today, but the idea of the output...