Found in Ferranti's 1969 documentation this circuit has a maximum operating frequency of 7.5 MHz. The circuit can be designed with modern transistors.
This low power audio amplifier was found at 1992s Popular Electronics. Transistors are general...
This test, the commercial transistor tester, had its diagram published in an article in Radio...
This light meter can be mounted with equivalent integrated circuit. The power is made by a single...