This 6-transistor commercial radio with 6 V supply was found in a Japanese publication from the 1960s. The circuit is a commercial superheterodyne with 150mW to 200mW of battery powered output.
This 5-transistor receiver for the medium wave range was described in an article in Radio...
This high current circuit using a MOSFET and an operational one was found in a documentation from...
This circuit was found in a 1969’s American documentation. It shows how to use two transistors to form...