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 astable multivibrator is one of the many configurations that we have in this section and on...
This circuit uses an FM IF transformer for tuning. The circuit is from a Radio Electronics...
Timings of up to 10 hours, depending on the capacitor used, can be obtained with this circuit that...