This commercial receiver for the mid-wave range of the 1960s was found in Japanese documentation at the time. The supply is 9 V, and the configuration is superheterodyne type.
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....