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Sansui AU2900 amplifier. Where can I find information for IC A798 (5-pin)?

April 26, 2017amplifier IC sansui

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Sansui AU2900 amplifier. Where can I find information for IC A798 (5-pin)?

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That “A798” is not an IC, it is a dual PNP transistor, with emitters in common. The full number is 2SA798, and pinout is B1, C1, E, C2, B2. The transistors are rated 50 Volts, 0.1 Amp, 0.2 Watt, 250-800 gain, with low noise-factor. These devices are generally used as low-level, low-noise differential amplifiers.