Electronics Help Care Amplifier circuit diagram This is a pre-amplifier design circuit for an amplifier. This is a vintage circuit diagram for bass and tone control. We have to use 12 volts for the pre-amplifier section. It’s a mono circuit board. Every amplifier needs this type of pre-amplifier circuit to produce a quality full audio output. For stereo, we have to use a dual circuit board.
All resistors are quarter-watt. All volumes are 100k. The voltage is a minimum of 9 volts to 15 maximum.
This is a vintage amplifier circuit diagram board. This circuit can make 150 watts + 150 watts. It’s a stereo audio amplifier circuit board. This circuit operates at a minimum of 25-0-25 V and a maximum of 45-0-45 V. Here, use 4 transistors: 2 transistors for the left channel and another 2 for the right channel.
The circuit diagram is here
This video for an 8-transistor amplifier circuit repair. This is a 500 watts audio amplifier circuit boad got short circuit problem. here used 2sc5200 and 2sa1943 transistor. 4 pair transistors are used. One pair of transistors can make a maximum of 150 watts of output. But this type of circuit can make 100 watts of output because of the voltage. We can not use the maximum voltage on this circuit board. We can use a maximum 80-0-80 voltage in this circuit, but it’s risky. The best voltage is a DC 50-0-50 voltage. 30-0-30 voltage to maximum 50-0-50 voltage.
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