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R20, R22 | 2 | 1N5817 | Schottky diode | | | | | | | | Tayda | A-1121 | | R21, R22, R23 | 3 | A1M | \*\*Potentiometer, 9 mm vertical board mount. Only 16 mm pots had long enough terminals, barely, to poke through the power safety block.

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