This 4-channel mixer amplifier was found in an American publication from 1947. The circuit uses counterphase output tubes and a transformer power source.
This oscillator is from a European publication from the 1980s. The signal generated is of low...
Found in American documentation from the 1980s, this circuit can generate signals from 50 kHz to...
A tap on sensor X1 of the circuit shown in the figure causes the flip-flop formed by the 4 NAND...