This 1960s Japanese receiver uses 6 germanium transistors, being powered by a 6 V voltage obtained from large batteries. The circuit is for the medium wave range of the superheterodyne type.
The configuration suggested by National Semiconductor in its 1994 Linear Applications Handbook uses an...
Found in American documentation from 1968, this circuit uses both diodes and a neon lamp to...
This oscillator, which can be used as a signal injector, was found in a Popular Electronics from the 90s....