This audio mixer was found in an old American documentation. The potentiometers are 1M and the input capacitors are 100 nF. The circuit requires power supply voltages from12 to 18 V.
What differentiates the CIR8139 circuit is the use of two inverter ports to trigger the transistor that...
The battery charger suggested in the figure has its current limited by resistor R1. This component may...
This circuit with increased power output was found in the November 1974 Radio Electronics...