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.
Found in an Electronic Design from the 90s, this circuit uses components from that time....
This timer for small intervals, but which can be increased with the increase of R1, was obtained in an...
This commercial circuit, sold under the designation H531 in Japan in the 1960s, used three...