We found this circuit in Ferranti's 1974 transistor manual. The components are from the period. The table gives the value of C1 for different frequency ranges.
This circuit, from a 1988 documentation, makes successive actuation of the shower to control the...
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
This circuit was found in a 1967 Electronics World. We can design it with a BF245 for the FET and a...