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Diode, DO-41 D3, D4, D5, D8, D9, D10 Standard switching diode, DO-35 | | R109, R111, R113 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 **Potentiometer, 9 mm vertical board mount OR: | | | | | Tayda | A-2939 | | | | | | | | R4, R12, R13 | 3 | A1M .

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