Chapter 6: Step by step design of a push-pull vacuum tube amplifier

In this chapter, we use all notions introduced previously to design, from scratch, a stereo push-pull tube amplifier. As before, we will proceed backwards. We start from the output stage, then the splitter and input stages. Finally, we deign the power supply.

We will design a hi-fi amplifier that provides roughly 12 Watt RMS, using EL84 power vacuum tubes in the output stage. The same steps, calculations, and schemas, can be used, in a similar way, to design an amplifier with different vacuum tubes and different output power.

The amplifier built according to this chapter is Il Terzo (12AX7+EL84)

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