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This electronics video tutorial discusses the basic elements of a multistage transistor audio amplifier circuit. It explains the importance of the bypass capacitors as it relates to voltage gain and distortion as well as the importance of the potentiometers for volume control and managing the input voltages. It also mentions the DC beta and hfe values of a typical NPN transistor as well as the purpose of the coupling capacitors. Finally, it discusses the efficiency of a regular common emitter transistor amplifier vs the class A transformer coupled amplifier. Transistors - NPN & PNP: https://www.youtube.com/watch?v=AcxDiesy-nI BJT Transistors - Electronic Switches: https://www.youtube.com/watch?v=VJJuxQk5fTY Night Activated LDR Sensor Circuit: https://www.youtube.com/watch?v=X5jm9_nikd8 Finding The DC Load Line & Q-Point: https://www.youtube.com/watch?v=qKIEyN_y3d4 Voltage Divider Bias Circuit: https://www.youtube.com/watch?v=jPSIQDyKm90 Collector Feedback Bias Circuit: https://www.youtube.com/watch?v=EzanqOFnCx4 __________________________________ Emitter Feedback Bias Circuit: https://www.youtube.com/watch?v=V1zKogDwXyk Common Emitter Amplifier: https://www.youtube.com/watch?v=ZUXG9eZfSlw Common Collector & Base Amplifier: https://www.youtube.com/watch?v=SmsTQ7MVqRw Darlington Pair & Beta Current Gain: https://www.youtube.com/watch?v=t1YECnWPGbQ Class A, AB, B, & C Amplifier Circuits: https://www.youtube.com/watch?v=0e_OUyGCaBs Voltage Gain of Transistor Amplifier: https://www.youtube.com/watch?v=-MyVscG-Pew _________________________________ Transistor Audio Mixer Circuit: https://www.youtube.com/watch?v=CKaDxZrjaGA Operational Amplifiers: https://www.youtube.com/watch?v=idJEMYhrIfs Summing Amplifiers: https://www.youtube.com/watch?v=p4FQyOwjhLA LM386 Audio Amplifier: https://www.youtube.com/watch?v=MvTCROpv_jw LC Oscillator Tank Circuit: https://www.youtube.com/watch?v=nh4q7mIhLrY _______________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections
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