This receiver for the AM band with 6 transistors was manufactured in the 60's in Japan. The power is made with 9 V and the circuit is of the super heterodyne type with FI of 455 kHz.
This filter can be implemented with almost any operational. The power suppply must be symmetrical. ...
This traditional circuit of old documentation uses a 0-1 mA milliammeter and has several scales....
This simple 2-transistor radio is from Radio Electronics in October 1952. The circuit outputs a...