Found in a 1947 publication, this circuit uses 4 parallel/push-pull tuber in the output stage. The circuit employs dual power supply with two rectifier tubes.
This circuit is from an old documentation. Integrated circuit 723 is not common today. The power...
This small receiver for the medium wave range was found in Radio Electronics magazine from July...
This astable multivibrator configuration causes two LEDs to alternately flash at a frequency...