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Lib="Amplifier_Operational" part="LM2902"> Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14 Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | R3, R21, R27, R28 | 3 | 22k | Resistor | | | | | | | | | ----- | --- | ---- | ----------- | ---- | ---- | ---- | ---- | | | J2 | 1 nF | Unpolarized capacitor | | Screws, nuts, and spacers (see [build notes](build.md)) | | | R25 | 1 | SW_3PDT_x3 | 3PDT miniature toggle switch - number of pins: 14; pin pitch: 3.50mm; Angled; threaded flange || order number: 1924279 16A (HC Generic Phoenix Contact connector footprint for: GMSTBV_2,5/4-GF-7,62; number of pins: 07; pin pitch: 5.00mm; Vertical || order number: 1829206 12A 630V Generic Phoenix Contact connector footprint for: MSTBV_2,5/8-GF-5,08; number of pins: 13; pin pitch: 3.50mm; Vertical; threaded flange || order number: 1803536 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/5-GF-5.08; number of pins: 11; pin pitch: 3.50mm; Angled || order number: 1924169 16A (HC Generic Phoenix Contact connector footprint for: GMSTBV_2,5/12-GF-7,62; number of pins: 07; pin pitch: 3.81mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1924473 16A (HC Generic Phoenix Contact.

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