| Q1 | MMBT3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, SOT-23 |
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| U1-U3 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 |
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| U4 | 40106 | Hex Schmitt trigger inverter |
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| U5,U6 | LM13700 | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers, DIP-16/SOIC-16 |
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| C1,C5-C9 | 10nF [FILM] | Unpolarized capacitor |
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| C2-C4 | 10nF | Unpolarized capacitor |
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| C10-C15,C23,C24,C29-C39 | 100nF | Unpolarized capacitor |
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| C16 | 100nF [OPT] | Unpolarized capacitor |
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| C17,C18 | 1nF | Unpolarized capacitor |
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| C21,C22 | 47uF | Polarized capacitor |
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| D2-D4 | 1N4148 | 100V 0.15A standard switching diode, DO-35 |
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| D10,D11 | 1N5819WS | 40V 600mV@1A 1A SOD-323 Schottky Barrier Diodes, SOD-323 |
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| H2 | POWER_CONN | |
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| J2 | CH_TRIG | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) |
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| J3 | OH_TRIG | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) |
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| J4 |
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