Introduction to Audio Power Amplifier
In this tutorial we shall study vacuum-tube amplifier
circuits which give a large output voltage of substantially the same waveform
as that of the input voltage, accompanied by a large curr ent of like waveform,
so that there is considerable power delivered to the load, rfhe operation
really is a power-conversion process, as in most cases all of the output power
derives from the plate d-c source, under the control of the signal voltage
applied to the grid. In general the treatment can often be made similar to that
used for voltage amplifiers, except that usually the operation is not linear
and therefore graphical or experimental procedures give most
accurate results.
