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.
The circuit is suitable for calls in a residence and was published in the Radio Electronics...
This 25 W phase photo control was found in a 1965 General Electric publication. The circuit uses a...
The integrated circuit in question is an adjustable high voltage regulator from Texas Instruments...