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β22 Bill of materials
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Signal boards2TOTAL$ 434.20£129.38
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Ground boards1
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PartPBPart detailsQTPart nameSupplierOrder codeUnit price ($)Unit price (£)Line Total ($)Line Total (£)Mouser BOMDigi key BOMCPC BOMDatasheetBCHKPCHKORDRCV
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Circuit board
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-1β22 printed circuit board3AMB$ 12.00$ 36.00YYYY
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Resistors$ 0.00
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R111/8W 1% metal film resistor 475Ω (L/R 8x gain)2Mouser71-RN55D4750F/R£0.05£0.1071-RN55D4750F/R|2YY
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R211/8W 1% metal film resistor 1MΩ (L/R 8x gain)2Mouser71-RN55D-F-1.0M£0.05£0.1071-RN55D-F-1.0M|2YY
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R311/8W 1% metal film resistor 182Ω (L/R 8x gain)2Mouser71-RN55D-F-182£0.05£0.1071-RN55D-F-182|2YY
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R411/8W 1% metal film resistor 1.21KΩ (L/R 8x gain)2Mouser71-RN55D-F-1.21K£0.05£0.1071-RN55D-F-1.21K|2YY
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R1- (G 2x gain)
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GR211/8W 1% metal film resistor 1KΩ (G 2x gain)1Mouser71-RN55D-F-1.0K£0.05£0.0571-RN55D-F-1.0K|1YY
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GR3,421/8W 1% metal film resistor 2.49KΩ (G 2x gain)2Mouser71-RN55D-F-2.49K£0.05£0.1071-RN55D-F-2.49K|2YY
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R5,621/8W 1% metal-film resistor 49.9Ω6Mouser71-RN55D-F-49.9£0.05£0.3071-RN55D-F-49.9|6YY
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R7,821/8W 1% metal-film resistor 56.2Ω6Mouser71-RN55D-F-56.2£0.05£0.3071-RN55D-F-56.2|6YY
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R9-12,25,2661/8W 1% metal-film resistor 2.21KΩ18Mouser71-RN55D-F-2.21K£0.05£0.9071-RN55D-F-2.21K|18YY
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R13,LED+,LED-31/8W 1% metal-film resistor 10KΩ9Mouser71-RN55D-F-10K£0.05£0.4571-RN55D-F-10K|9YY
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R14,1521/8W 1% metal-film resistor 121Ω6Mouser71-RN55D1210F£0.22£1.3171-RN55D1210F|6YY
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R16-1941/8W 1% metal-film resistor 10Ω12Mouser71-RN55D-F-10£0.05£0.6071-RN55D-F-10|12YY
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R20,2121/8W 1% metal-film resistor 249Ω6Mouser71-RN55D-F-249£0.05£0.3071-RN55D-F-249|6YY
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R22,2721/8W 1% metal-film resistor 562Ω6Mouser71-RN55D-F-562£0.05£0.3071-RN55D-F-562|6YY
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R23,2421/8W 1% metal-film resistor 1.82KΩ6Mouser71-RN55D-F-1.82K£0.05£0.3071-RN55D-F-1.82K|6YY
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R30, R3120Ω (wire jumper)Y
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R28,29,3231/8W 1% metal-film resistor 75Ω9Mouser71-RN55D-F-75£0.05£0.4571-RN55D-F-75|9YY
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R3311/8W 1% metal-film resistor 33.2Ω3Mouser71-RN55D-F-33.2£0.05£0.1571-RN55D-F-33.2|3YY
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R34,3522W 5% metal-oxide resistor 0.47Ω (see notes below) (inc to 1R)6Xicon 282-1.0-RCMouser282-1.0-RC£0.14£0.86282-1.0-RC|6YY
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Rz22W 5% metal-oxide resistor 22Ω (Zobel resistor, see Wiring & ground)) (1 per output channel)2Xicon 282-22-RCMouser282-22-RC£0.14£0.29282-22-RC|2YY
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Rg15W wirewound resistor 10Ω (Ground loop breaker resistor, see Wiring & ground))Y
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Potentiometers
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VR113/8" multi-turn cermet trimpot 200Ω3Mouser72-T93YA-200£1.09£3.2772-T93YA-200|3YY
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VR213/8" multi-turn cermet trimpot 500Ω3Mouser72-T93YA-500£1.09£3.2772-T93YA-500|3YY
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VR313/8" multi-turn cermet trimpot 5KΩ3Mouser72-T93YA-5K£1.09£3.2772-T93YA-5K|3YY
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Volume150K TKD 2CP-25111Private sale$ 80.00$ 80.00http://www.tkd-corp.com/products/att/pdf/cp2500as-e.pdfY
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Capacitors
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C1-55multilayer ceramic capacitor 33pF (L/R, 8x gain) + Ground C111Kemet C315C330J1G5TAMouser80-C315C330J1G£0.30£3.3080-C315C330J1G|11YY
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GC2-55multilayer ceramic capacitor 100pF (G, 2x gain)5Kemet C315C101J1G5TAMouser80-C315C101J1G£0.30£1.5080-C315C101J1G|5YY
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C6-C8, C13, C14, C17, C187metallized polyester capacitor 1µF21Wima MKS2 AMB$ 0.90$ 18.90YYY
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C9-C124aluminum electrolytic capacitor 100µF 50V12Panasonic EEU-FC1H101Digi-keyP10323-ND£0.38£4.5712,P10323-NDYY
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C15, C162aluminum electrolytic capacitor 470µF 50V6Panasonic EEU-FC1H471Digi-keyP10328-ND£0.71£4.276,P10328-NDYY
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Cz2metallized polyester or X7R multilayer ceramic capacitor 0.047µF 100V (Zobel capacitor) 1 per channel2Vishay MKT1818347014Mouser75-MKT1818347014£0.31£0.6275-MKT1818347014|2YY
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Cg1metallized polyester capacitor 0.1µF 250VAC class X or YY
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Transistors
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Q1, Q22N-channel JFET 2SK170BL6AMB$ 2.50$ 15.00YYY
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Q3, Q42P-channel JFET 2SJ74BL6AMB$ 2.50$ 15.00YYY
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1JFET matching3AMB$ 4.00$ 12.00YYY
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Q5, Q6, Q11, Q12, Q15, Q16, Q17, Q258NPN small signal BJT BC550C24AMB$ 0.20$ 4.80YYY
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Q7, Q8, Q9, Q10, Q13, Q14, Q18, Q268PNP small signal BJT BC560C24AMB$ 0.20$ 4.80YYY
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Q19, Q202N-channel JFET PN43926AMB$ 0.25$ 1.50YYY
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Q21, Q232International Rectifier N-channel power MOSFET IRFZ24N6AMB$ 1.75$ 10.50YYY
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Q22, Q242International Rectifier P-channel power MOSFET IRF9Z34N6AMB$ 1.75$ 10.50YYY
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Diodes
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D1, D2, D5-D10812V 500mW zener diode BZX55C1224AMB$ 0.25$ 6.00YYY
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D3,42small signal diode 1N41486Mouser512-1N4148£0.06£0.36512-1N4148|6YY
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D11,1221A rectifier diode 1N40046Mouser512-1N4004£0.09£0.51512-1N4004|6YY
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LED+,-2Amber LED 2V 800mcd@20mA6Mouser604-WP7113SED£0.16£0.97604-WP7113SED|6YY
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CR1-CR88Current regulator diode 0.56mA 1N529124AMB$ 5.00$ 120.00YYY
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Miscellaneous
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-4TO-220 extruded heatsink Aavid-Thermalloy 529802B00000 1.5" (1 MISSING)12AMB$ 2.00$ 24.00YYY
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1TO-220 extruded heatsink Aavid-Thermalloy 529802B00000 1.5"1Digi-keyHS276-ND£0.971,HS276-NDYY
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2RCA phono jacks, panel-mount (white)2Neutrik NF2D-B-9CPCAV11153£2.75£5.50AV11153,2YY
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-2RCA phono jacks, panel-mount (red)2Neutrik NF2D-B-2CPCAV11149£2.91£5.82AV11149,2YY
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-21/4"" stereo phone jack, panel-mount2Neutrik NJ3FP6CCPCCN02847£3.89£7.78CN02847,2YY
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-1Ebay 4xbinding posts1Ebay£7.45£7.45
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-8circuit board standoffs or spacers2425 10mm spacersCPCPC00142£0.09£2.10PC00142,24YY
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-1chassis case (your choice, see below)1Galaxy 1GX388modushop1GX388£31.50£31.50Y
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-4rubber feet for chassis case4Galaxy PDAMMGOMMAmodushopPDAMMGOMMA£3.50£14.00Y
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J1, J21Molex KK 0.100" 2-circuit header3Molex 22-11-2022Digi-keyWM2700-ND£0.62£1.863,WM2700-NDYY
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1Molex KK 0.100" 2-circuit plug3Molex 22-01-3027Digi-keyWM2000-ND£0.22£0.663,WM2000-NDYY
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2Molex KK 0.100" crimp terminals6Molex 08-55-0102Digi-keyWM2312-ND£0.17£1.006,WM2312-NDYY
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550MBC550C for device matching100Mouser512-BC550CBU£0.02£2.30512-BC550CBU|100YY
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560MBC560C for device matching100Mouser512-BC560CTA£0.04£4.00512-BC560CTA|100YY
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1Amphenol Eco|Mate (C16-M) female chassis mount1C016 20G003 100 12CPCCN10970£5.81£5.81CN10970,1YY
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1Amphenol Eco|Mate (C16-M) male cable mount1C016 20H003 110 10CPCCN10959£6.51£6.51CN10959,1YY
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LM1LED mounting1Mouser749-CR-174L£0.12£0.12749-CR-174L|1http://www.bivar.com/images/cart/CR-174L.pdfYY
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1Volume knob 121Ebay$ 7.20$ 7.20Y
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AMB P&P$68
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β22
ε22
ε12
σ22
σ11
Sheet10
Other tools
Connectors