Electro Harmonix Bass/Guitar Synth free download

File name electro harmonix_b_gsynth.pdf

+V C5 0.0018 R15 +V 8 A2A A2B 5 7 6 RC4558 4 D2 1N914 2 6 7 5 A3B RC4558 C12 0.47 TANT. C13 OCTAVE 100K LIN R28 4 R29 8.2K 4 A4A 1 3 RC4558 8 +V D3 7 6 8 RC4558 3 1 2 PEAK FOLLOWER R41 220 SQUARE WAVE MODULATOR -V A6B Q1 5 7 6 2N5087 RC4558 0 TO -7V DEPENDING ON SIGNAL D11 1N914 R38 22K 7 R40 6.8K 1 2 5 13K 3 6 7 TO ADAPTIVE SCHMITT TRIGGER TO VCA SWEEP GENERATOR TO VCF SWEEP GENERATOR TO SUB-OCTAVE TRACK & HOLD MODULATOR (A18) & OUTPUT 4 5 TO VCF (A10) ELECTRO HARMONIX DESIGNED BY: D.COCKERELL REVISION: 12/12/78 D9 1N914 C16 4.7 R39 120K D8 1N914 D10 1N914 6 HIGH ON SILENCE R42 820K RC4558 R43 1K 4 -V R45 470 ATTACK DETECTOR NORMALLY -8V PULSES HIGH ON ATTACK R44 330K 5 7 6 7 A7B RC4558 A5A SQUELCH SMALL SIGNAL DETECTOR +V 1N914 -V +V R32 390K -V R30 2.2K R25 22K C11 1.0 -V TANT. TRIGGER R31 100K LIN 4 2 3 R33 330 A7A RC4558 0.082 R27 4.7K GUITAR R6 100K LIN D1 R5 13K 1N914 8 +V PREAMP GAIN R3 10K R4 470 RC4558 0.47 TANT. C1 0.1 C2 0.022 C3 0.0022 10K 10K 7.5K R10 2 3 RC4558 R12 C4 FULL WAVE RECTIFIER R11 3 4 A3A 1 R7 2.2K 700 HZ LOW PASS FILTER R8 R9 3.3K 33K 1 R13 15K -V -V 3.3M R14 100K SQUELCH R16 27K J1/INPUT 1/4" PHONEJACK R2 3 4.7K 2 1 R1 68K -V D4 D5 D6 D7 1N914 1N914 A4B LOG AMP 5 7 C10 0.1 6 1K RC4558 R23 47K R24 2 -V 1N914 1N914 R26 820 R18 27K 560 3.3K 2.2K C8 2.2 22K C9 1.0 R19 SMOOTHING FILTER R20 R21 R22 -V A6A 1 A5B 5 C7 4.7 TANT. R17 C6 4 STOP DETECTOR 1 2 2.7K 1.0 3 RC4558 SQUARE WAVE SHAPER 8 NORMALLY LOW 8 PULSES HIGH AT END OF NOTE +V +V +V C14 SQUARE WAVE R36 100K LIN R37 R34 3 1.0 4 CA3094 (or EH1040) 2.7K C15 0.047 R35 2 A8 1 8 6 5 10K -V SQUARE WAVE SHAPER * ALL CAPACITOR VALUES IN MICROFARADS Title ELECTRO HARMONIX BASS MICRO SYNTHESIZER Size Document Number A DRAWN BY: FABIAN P. HARTERY Date: September 28, 1996 Sheet 1 of REV 1 3 ADAPTIVE SCHMIDT TRIGGER R49 220 2 SUB-OCTAVE TRACK & HOLD MODULATOR -V 1 +V R57 27K 3 2 A18 8 R56 47K C21 0.1 -V 7 +V D16 1N914 R70 22M -V R68 1K +V +V Q3 2N5087 R71 680K 7 3 R72 1K 2 3 A13 1 8 6 5 5 6 8 1 0.0033 7 C25 4 A10 CA3094 /EH1040 2 R75 3.3K R76 8.2K R77 47K R78 1K R69 12K -V -V A11 CA3094 /EH1040 2 3 4 R79 3.3K -V -V A12 CA3094 /EH1040 R80 8.2K R81 5 6 8 1 0.0033 C26 7 47K 2 R82 1K 3 2.2K D17 1N5235 6.8V R73 SWEEP RATE R74 100K LIN R64 10K -V R59 470 -V R60 27K R62 12K -V 4 4 R55 3.9K R58 470 2 1 0 A17B CD4013 5 D CLK R Q 11 9 3 12 +V CLK 13 Q S D 6 5 47K Q R A17A 6 CD4013 1 S Q CA3094 EH1040) 7 (OR 1 8 6 C22 5 +V 3 47K 8 C19 4.7 TANT. R48 10K 4 -V R46 1N914 R47 3 5 3.3K 3.3K A15B RC4558 D13 7 A15A RC4558 R53 1 6 D12 1N914 C17 0.0033 +V 0.0033 R50 6.8K R52 220 R51 10K C20 4.7 TANT. A16B RC4558 R54 7 8 Q2 2N4302 C23 R61 100K LIN SUB-OCTAVE 1.0 3 1N914 D14 1N914 A16A RC4558 D15 1 C18 0.1 2 4 -V S-R FLIP FLOP & DIVIDE BY TWO SPECIAL NOTE: PIN 14 IS CONNECTED TO THE POWER SUPPLY GROUND AND PIN 7 IS CONNECTED TO THE -V SUPPLY. -V R63 10K +V STOP FREQUENCY R66 8 U9A RC4558 C24 0.082 3 R65 100K LIN 3.3K 1 2 R6