Found in a publication by Gernsback from 1960, this circuit uses germanium transistors of the time and commercial coils. It can be changed to operate with modern transistors and other wavebands.
The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. Some of...
This simple transistorized radio for listening on a crystal phone was found in a Japanese...
In the MEMs line of the ST available on Mouser Electronics we highlight the MP23AB01DH audio...