Solar radio (CB20485E)

This circuit is from a 1991 publication. The integrated circuit used is an integrated radio from that era.

Voltage Follower with the LF357 (CB3993E)
The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the...
Six Transistor Superheterodyne Receiver (CB964E)
This sensitive MW receiver was found in a publication of year 1958., The circuit uses germanium...
Simple Metal Detector (CB5335E)
This metal detector circuit uses an AM radio as an indicator. The radio is placed off-station and tuned...