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Introduction to RC coupled Audio Frequency Triode …
https://colinjs.com/elec/audio/triodeamp.htm
The circuit below shows two stages of a triode valve audio amplifier. The input and output of such an amplifier are usually through additional coupling capacitors, which are not shown as we will be concentrating on the effect of the stage comprising the valve V1, and the coupling between it and the next stage, V2.
What are the amplifier circuits of the triode?
https://www.allicdata.com/news/discrete-semiconductor/what-are-the-amplifier-circuits-of-the-triode.html
2, common emission amplifier circuit. The circuit schematic is as follows: 1. Input impedance: Zin = beta * Re. (R1 and R2 provide the bias voltage for the triode, which is ignored here, of course, should be considered.)
A 211 SE Triode Amp | audioXpress
https://audioxpress.com/article/A-211-SE-Triode-Amp
This is an easy to build, simple direct-coupled input/driver circuit that provides the proper drive voltage to the grid of the 211. A nice way to experiment with a single-ended (SE) triode amplifier. PHOTO 1: Front view of amp showing rack-mount chassis. Article originally published by audioXpress May/2001. By Nick Soudas.
The Triode | Electron Tubes | Electronics Textbook
https://www.allaboutcircuits.com/textbook/semiconductors/chpt-13/the-triode/
A simple triode circuit is shown to illustrate its basic operation as an amplifier: The low-voltage AC signal connected between the grid and cathode alternately suppresses, then enhances the electron flow between the cathode and plate. This causes a change in voltage on the output of the circuit (between plate and cathode).
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