We found this circuit in a 1968 Electronics World. The transistors are from the era and information about the transformer was included. Transistors support current equivalents.
Rapid Prototyping Boards for 32-bit Applications Include Peripherals, Easy-to-use Interface and...
A stereo digital mixer using the 4053 is built as shown in figure bellow. The IC must be powered...
This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is...