This 6-transistor Japanese radio for the medium wave range was manufactured in the 1960s in Japan. The circuit is superheterodyne with a 6 V power supply.
This configuration can be found at several points in this section and on this website. With the...
The circuit in the figure indicates when the input voltage exceeds a certain value adjusted by the...
This receiver was obtained in a documentation from the 90's and is of the super-regenerative type....