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Switch ON-ON Push button switch with Signal Lamp, generic K switch dp3t ON-ON-ON D Switch, three position, single pole double throw, separate symbols Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | | | U1 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x4 | | | | L1 | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x2 (see build notes) 1 SIP socket, 2.54 mm, 1x7 | | R16, R17, R19, R20 | 4 Hardware/PCB/precadsr/precadsr.sch | 4 | 47k | Resistor | | | | Tayda | A-2939 | | S1 | 1 | TL074 | Quad operational amplifier, DIP-14"/> 2 pin Molex header 2.54 mm spacing | | | | U3 | 1 | B10k | Potentiometer | .

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