This circuit is from Mullard 1969 documentation. The circuit operates at a relatively high supply voltage and has a 10 Vpp output. The transistors are of the time, but admit equivalents.
This circuit, for its simplicity and the fact of using a super-regenerative detector only works...
This circuit, from a former publication of 1968 was originally designed for germanium transistors, but with the...
This circuit was obtained in an American publication of the time. Transistors are commonly used. The...