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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Great American Sound MM Phono
Great American Sound MM Phono
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Old 6th June 2015, 01:57 AM   #1
gasgeek is offline gasgeek  United States
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Join Date: Aug 2012
Location: SO CAL
Default Great American Sound MM Phono

There were a few GAS MM phono boards. Unfortunately I only have schematics for two late model versions. But I do have the setup procedures for the 223, 323, 333, and 523 early boards. The only real difference is the bias setting for the Thaedra 2. Set R9 for a bias of 1 volt across the 51 ohm resistor, R20, and 1 volt across the other 51 ohm resistor, R19.

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