This very complex circuit in terms of the number of transistors was found in Radio Electronics from March 1966. The circuit is for low impedance headphones. The transistors are from the time.
This latched circuit uses an LDR as a sensor. It must be powered by a voltage of 5 V....
This amplifier must be supplied with a voltage of 24 V and the resting current is of the order of 4...
This very high voltage (VHT)generator was found in a 1995 documentation. The transistors must be...