Electronics Help Care electronics circuit diagram
Transistor amplifier circuit diagram using high and low voltage:
This is a Transistor amplifier circuit diagram using high and low voltage. this amplifier run with dual voltage. positive 50 volt, positive 100 volt. and negative 50 volt, negative 100 volt. here used MOSFET to run the high voltage. here use two transistors. this pair transistor makes 300 watts. 2sc2922 and 2sa1216.
The transistor 2SC2922:
The material of the transistor is Si. The polarity is NPN. The maximum Collector Power Dissipation is 200W. the maximum Collector-Base Voltage is 180V. the maximum Collector Current max is 17A. The max operating Junction Temperature is 150 °C. The transition Frequency is 25 MHz. The Current Transfer Ratio (hFE), MIN is 33.
The transistor 2SA1216:
The material of the transistor is Si. The polarity is PNP. The maximum Collector Power Dissipation is 200W. the maximum Collector-Base Voltage is 180V. the maximum Collector Current max is 17A. The max operating Junction Temperature is 150 °C. The transition Frequency is 25 MHz. The Current Transfer Ratio (hFE), MIN is 33.
All resistors are used 1/2 watts. 51 ohms are 3 watts. 4.7 ohms are 1 watts. 10 ohms 1 watts. we also can use 2sc5200 transistors. This circuit doesn’t have speaker protection. here, we need a speaker protection circuit. here is the link to get the speaker protection circuit. Diagram is here
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This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. if the amplifier has any problem then this circuit can save our soundbox. Normally when the transistor makes a short circuit the voltage comes out from the speaker output line then this circuit protects that voltage. This circuit should not allow any direct voltage to be sent to the speaker. This circuit is very important for protecting the speaker.
