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    Single-ended effect tube headphone amplifier ----- Class A Headphone Amplifier

     

    Author: ywm2011 I have always liked music (also like DIY), so I have been looking for a simple single-ended single-ended field of high quality production! First previous circuit diagram: first look at the circuit structure is very simple! An N-channel field tube to complete the main extension and use LM317 to do a constant current source load, and finally output to the headset by axial capacitance! The magnification and field tube current are controlled by 100K adjustable resistance! This circuit can be adjusted to become Class A (Class A) ear, need to increase the calculation of the thermal film and increase the constant current (5R resistance), because there is no good cattle (output power) So don't use the LM317 to make a steady power supply to the power supply of "嗡嗡", "嗡", the power supply voltage is stable at 15V field tube G-stage voltage: rch LCH Output to my headset MX365 Bottom map: Local Close: 1 Local Close: 2 Local Close: 3 Local Close: 4 Local Close: 5 Listening: Don't say, the sound of the quasika can still drop a lot of ear! Colleagues say good!

     

     

     

     

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