Brief introduction
this is a A1 Class A Audio Amplifier built by the design of Musical Fidelity A1 audio amplifier.
Features
±18 to ±22V power supply
20W x 2 output
2SC5200/2SA1943 for power output
All balanced Class A design
Collector driving
BD139 and BC140 for medium power
2.0mm white FR-4 PCB
BC556, BC546 as signal amplifier
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