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.
Obtained in a 90s Radio Electronics, this configuration appears with variations in other points of...
This detector uses an unusual sensor today. The circuit is from an 80s documentation. Its...
This alarm with the 555 integrated circuit is from an EDN from the 90s. The circuit directly...