We found the circuit of this Japanese transistorized commercial receiver in a documentation from the 1960s. It is a radio for the medium wave range with 6 transistors and 9 V power.
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
This circuit was found in a Popular Electronics from the 80's. The circuit can be powered with...
This circuit was found in an American 1980s documentation. It analyzes the exhaust gas of a...