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With mods Light emitting diode | Tayda | A-553 | | R5, R29 | 3 | 1nF | Film capacitor | | R4, R12, R13 | 3 | A1M | \*\*Potentiometer, 9 mm or 16 mm vertical board mount. Only 16 mm pots had long enough terminals, barely, to poke through the board, adding an extra cross-board wire that shouldn't be over about 20mm in diameter at.

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