Signals that excite complementary or push-pull outputs require a phase inverter for the audio signals. In the tube circuits it is common to use double triodes, like the two circuits shown in the figure below, from an old manual.
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Signals that excite complementary or push-pull outputs require a phase inverter for the audio signals. In the tube circuits it is common to use double triodes, like the two circuits shown in the figure below, from an old manual.