4ch band mixer circuit
The circuit consists of 4-channel mixer with mono channels 1-4, while for the stereo channels 5-6.
The number of input channels can be varied, while the choice between mono and stereo channels. The RV1-6 regulates the volume and channel players. The balance between the two channels is achieved by RV7-12. The adder adds the two b IC1a signals of input channels. The mower two TR1-2 on each channel provides the upward adjustments of each IC, as regards the size of the output signal as you want.
The settlement of three bands in the stage of the equalizer, where the output of the console has been IC1a-b. There was a gain of one and is responsible for the separation of former levels driven from the device. The use of headphones is possible by the existence of a circuit in the region IC2A-b, their production can be produced in the connectors JF13. The use of stereo VU meter to visually display the volume. The connection JF12b resumed the supply of different circuits, which consists of a mixture of excitement.
Modules for the mono input channels IC1, or other types of integrated circuits for reversing and regulating the gain of the unit from low to high microphones. The input module for micro-electronic scale line has a constant control of the scene 22K ohm pot. The preamplifier of the microphone to use transistors to regulate the zener diode voltage of the main line. The module input channel stereo is connected to a profit has increased the value of resistors in parallel with the capacitors. Other circuits of the main circuits connected stereo phono preamp, 3 equalizer, power and monitor mixer inputs for selection are the headphone jack.
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