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NTE Electronics NTE3042 Optoisolator with NPN Transistor Output, 6 Lead DIP Type Package, 3V, 3 Amp: Transistors: Amazon.com: Industrial & Scientific
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Amazon.com: 5-Pair Audio Power Amplifier Transistor, High Power Silicon Transistor 2SA1943 A1943 +Match with 2SC5200 C5200, PNP NPN Amplifier Transistor Assorted : Electronics
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