Sanyo M2420 Audio Circuit

The M2420 audio circuit has a transformer output in the final stage. The power output circuit consists of transformer TR3 that splits the audio signal phase. A pair of transistors, 2SD400F (BC182) then amplifies each phase. A transformer TR2 at the final output recombines the signal phases and drives an 8-Ω (2 watt) loudspeaker.

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