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TO-92 R16, R17, R19, R20 | 4 .../PCB/precadsr_Gerbers/precadsr-job.gbrjob | 2 | 1N5817 | Schottky Barrier Rectifier Diode, DO-41 Quad operational amplifier, DIP-14 | | | | | | R23, R24, R25, R27 Switch, triple pole double throw, separate symbols | | | Tayda | A-4349 | | | R9, R11, R13 | 3 | A1M | Potentiometer | | | | | | | Tayda | A-3486 or A-3487\*\*\* | | | Tayda | A-804 | | Tayda | A-2939 | | | R25, R27, R29 | 3 pin Molex connector 2.54 mm spacing | Tayda | A-3588 | \** Use only four (4) potentiometers, either 9 mm vertical board mount | | | | | | | | C13 | 3 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TSSOP-8/VSSOP-8 Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | R109, R111, R113 | 3 | A1M | Potentiometer | | S2 | 1 | 10nF | Film capacitor | | Tayda | A-1531 or A-557 | | C7, C12 | 2 | 4.7k | Resistor | | J2 | 1 | Conn_01x07 | \*(optional) SIP socket, 2.54 mm, 1x4 | | | | Q1, Q2, Q3 | 3.

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