Transistor breakdown (CB21393E)

This inverse transistor breakdown circuit was found in a 1967 documentation. It applies to modern components.

Playback amplifier (CB23522E)
This amplifier for recording heads was found in a Radio Electronics from September 1963. The...
Voltage Regulator 100 V x 20 mA (CB12670E)
A negative floating regulator capable of supplying an output voltage of -100 V with regulation of 20 mV for...
Modulated Power Supply For LASER Pointer (CB1184E)
This circuit allows controlling a LASER pointer with an input logic signal. R has 10 ohm for 3 V...