A relatively complete discussion of amplifier circuits, including the electronic devices used (tubes/valves, transistors (JFET, BJT, MOSFETs)), how they're biased, and how the AC behavior is analyzed and understood in terms of gain and input/output impedances. In keeping with the previous videos in this series, the focus is on RF amps, but much of the theory applies to audio amplifiers as well. A few full circuit schematics are used to show real-world examples.
Part 2 was added as an "Appendix" to this series since it covers material in a bit more depth. It can be found here: [ Ссылка ]

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