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Anybody know of a good substitute for an IC, TL604? It's being used in a Randall Century 170II. Looks like an op amp, but different pinout & function. The supplies are -12v on pin5, +12v on pin 8. Pins 1 & 6 are switching a dual LED, pin 7 appears to be an input for a gain stage, with the output on pins 3 & 4, tied together. I couldn't get an NTE sub for it. Don't know if I can get one from Randall or not. Anybody seen this type of IC before?
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