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4 Knobs Screws, nuts, and spacers (see build notes Change C13 to 10 nF | Unpolarized capacitor | | | R4, R6, R7, R30, R31 Switch, dual pole triple throw, 3 position switch, SP3T K switch single-pole double-throw spdt ON-ON K reed magnetic switch D Switch, dual pole double throw, separate symbols Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8"/> Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 **Potentiometer, 9 mm vertical board mount OR: | | C7, C12, C13 | 1 uF tantalum\nYuSynth 1, 10 µF tantalum.\nMFOS 1, 1+15 µF electrolytic.\n1 µF tanty looks better than EL\n(higher output, less leakage)\nbut only by a little. 1 µF tantalum.\nYuSynth 1, 10 uF tantalum\nMFOS 1, 1+15 electrolytic\n1 uF tanty looks better than EL\n(higher output, less leakage)\nbut only by.

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