Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz. Modern equivalent transistors can be used.
This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is...
This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power...
The gain for this circuit is given by the ratio R1/R2. The circuit must be powered from a dual...