High gain radio (CB21922E)

This simple 1 transistor radio was found in Raytheon's transistor manual. The transistor is germanium from the 60s.

Pink and White Noise Generator (CB26193E)
We found this circuit in the Electronics Experimenter Handbook 1983 edition. The circuit uses...
LA1905 Power supply (CB24572E)
This little-known regulator today was found in a Radio Electronics circuit from December 1978. The...
Speed control using the 555 (CB7523E)
This circuit was obtained in a 1982 Maplin magazine. The circuit can be applied to equivalent power...