The circuit presented is a Japanese commercial radio from the 1960s. With a 4.5 V supply, it is a super-heterodyne type with an IF of 455 kHz. 6 germanium transistors are used.
This Harris circuit from the 90's is intended for recording old EPROM memories. The circuit uses...
This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are...
The circuit shown in the figure is an application suggestion for ISL8107, a new integrated circuit...