Found in a 1967 General Electric documentation this circuit uses unijunction transistors that may be equivalent to those indicated. The number of stages can be modified.
circuit is used to increase the sensivity of a relay. A 50 to 100 mA relay can be triggered with...
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
This circuit causes the powered lamp to fluctuate in brightness by 20% intensity. It can be used...