This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
This circuit appears in several versions in publications of the time and can be modified by...
This interesting circuit of the American publication Electronics Handbook Volume XIII 1993 shows a...
This simple SCR alarm circuit was found in an old Poptronics, but can be easily assembled as all...