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 mixer configuration with the 741 operational amplifier can be found on several other circuits in...
Touching the sensor with your fingers, this circuit produces a machine gun sound. The circuit must...
This 13.8 V power supply with 10 A was found in a 1997 documentation. It is intended for the...