The TAA865 integrated circuit used in this 1986 project is no longer common today. The circuit is a documentation of the time and the time is given by RC that has indicated the maximum values.
This super regenerative detector circuit was found in an English documentation from 1963. The coil...
This circuit was found in an old English publication. The circuit makes use of general-purpose transistors....
This configuration, which appears in the manual of other manufacturers, is an excellent 1.5 V...