Updated BOM for the Karplus Strong board Resistors Value Qty Parts 100 1 R44* 200 2 R15, R16 1k 4 R6, R40, R45*, R46* 2k 1 R12 2.2k 1 R37 5.1k 2 R14, R27* 5.6k 2 R1, R2 10k 6 R10, R26*, R29, R31, R32, R33 20k 1 R17 30k 2 R8***, R13*** 39.9k 1 R11 100k 17 R3, R4, R5, R7, R9, R18, R20, R21, R22, R23, R24, R25, R28, R30, R36, R38, R41 Capacitors Type Value Qty Parts 0.1u 9 C2, C3, C5, C14, C16, C17, C18, C19, C20 0.022u 1 C7 1u 1 C13* 10u 7 C1, C4, C6, C9, C11, C12, C15 18p 1 C8 470p 1 C10 Semiconductors Value Qty Parts LED 2 LED1, LED2 1N4148 4 D1, D2, D6**, D7** Zen-4V7 2 D3, D4 2N2222 2 T1, T2* LM7805 1 IC1 TL074 1 IC2 LM13700 1 IC3 MN3207 1 IC4 MN3102 1 IC5 Potentiometers Type Value Qty Parts Trim 10k 2 R19, R34 Trim 100k 1 R39 Linear 10k 1 R35 Linear 100k 2 R42, R43 Other parts Value Qty Stereo Jack* 2 Mono Jack 6 Switch DPDT** 1 Build options: - For modular use: omit all parts with * - If not using battery power, omit all parts with ** - The configuration shown is for +/-15 V use. If you want another voltage. replace *** with appropriate values. 12V: 24k, 9V: 18k.