Bill of Material from SP_Tuner_Monitor_1.2.sch, 63 parts, as of 2/21/2011 11:13:21 PM Value Qty Device Part 0.0047u 1 C-US050-025X075 C1 Polystyrene or better/equivalent 0.1u 2 C-US050-025X075 C8, C12 0.01u 1 C-US050-025X075 C9 10u 5 CPOL-USE2.5-5 C2, C4, C5, C7, C11 100u 1 CPOL-USE2.5-6 C3 1.0u Tant 2 CPOL-USE2.5-5 C6, C10 1N4148 2 1N4148 D1, D2 1N4001 2 1N4004 D4, D6 +12V 1 LED_PANEL D3 -10V 1 LED_PANEL D5 LM741 1 LM741 IC1 LM317 1 LM317TS IC2 LM337 1 LM337TS IC3 SIG OUT 1 JACK_ST J1 SIG IN 1 JACK J2 PHONE OUT 1 JACK_ST J3 -10v +12v 1 MTA04-156_12-10 J4 DOEPFER_10 1 DOEPFER_10 J5 2 FE_BEAD L1, L2 2N5172 5 2N5172 Q1, Q2, Q3, Q4, Q6 PN5138 1 PN5138 Q5 180k 1 R-US_0207/10 R1 82k 1 R-US_0207/10 R2 47k 2 R-US_0207/10 R3, R13 68k 2 R-US_0207/10 R5, R10 22k 3 R-US_0207/10 R6, R14, R16 2.2k 1 R-US_0207/10 R7 51k 1 R-US_0207/10 R8 2.2M 1 R-US_0207/10 R9 1.2k 1 R-US_0207/10 R11 1k 2 R-US_0207/10 R22, R26 5.1k 1 R-US_0207/10 R15 25k REF TUNE 1 PANEL_POT R4 This may have to be bigger to let you tune it to 523.3 Hz. I used a 100k pot which was perfect for me. 25k PHONE LEV 1 PANEL_POT R17 68 3 R-US_0207/10 R18, R20, R24 10k 2 R-US_0207/10 R19, R25 5k XOVER 1 R_TRIM_Y R12 100k +12V 1 R_TRIM_Y R21 100k -10V 1 R_TRIM_Y R23 SW_SP4T 1 SW_SP4T SW1, SW2, SW3 (Each "SW" is 1/3 of SW_4P4T)