Akashic Guitar effects circuit lookup
FREQUENCYRAMP LEVELSINE LEVELSINE SHAPE

Enclosure not stated · 4 knobs

Experimentalists Anonymous

EMS VCS3 Osillator

Category
Ring Mod / Synth· Oscillators LFOs and Signal Generators
Controls
Frequency · Ramp Level · Sine Level · Sine Shape
Price
see vendor
Tags
Oscillators LFOs and Signal Generators
Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 74 rows

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Check before you build · 2 values the reader of this schematic was not sure of
  • Q63: polarity not legible
  • sot resistor: value chosen on test
RefValueNormalizedTypeNotes
Resistors 36
Rx220k220kselected; read from the schematic by eye
R16168k68kread from the schematic by eye
R1761k01kreplace with Q81 TC resistor; read from the schematic by eye
R178220k220kread from the schematic by eye
R17912k12k15k 1% if matrix true summing is fitted; read from the schematic by eye
R18047k47kread from the schematic by eye
R1821k21.2kread from the schematic by eye
R183120k120kread from the schematic by eye
R1848k28.2kread from the schematic by eye
R1854k74.7kread from the schematic by eye
R1868k28.2kread from the schematic by eye
R18710k10kread from the schematic by eye
R18847k47kread from the schematic by eye
R189470R470read from the schematic by eye
R1902k72.7kread from the schematic by eye
R19110k10kread from the schematic by eye
R19222k22kread from the schematic by eye
R19310k10kread from the schematic by eye
R1942k72.7kread from the schematic by eye
R19768k68kread from the schematic by eye
R1989k19.1kread from the schematic by eye
R19922k22kread from the schematic by eye
R20015k15kread from the schematic by eye
R20147k47kread from the schematic by eye
R2025k65.6kread from the schematic by eye
R20310k10kread from the schematic by eye
R20410k10kread from the schematic by eye
R2052k72.7kread from the schematic by eye
R20668k68kread from the schematic by eye
R20727k27kread from the schematic by eye
R208220R220read from the schematic by eye
×15k65.6kundesignated, under D32; read from the schematic by eye
×18k28.2kundesignated, under D33; read from the schematic by eye
×1??undesignated, 'sot' (select on test), in series with the Frequency pot; read from the schematic by eye
×13k33.3kundesignated, Mk II only (to PB2/PB3); read from the schematic by eye
×12k72.7kundesignated, Mk II only (to PB3/PB1); read from the schematic by eye
Capacitors 5
C571000p1nread from the schematic by eye
C5833p33pread from the schematic by eye
C590.015uF15nread from the schematic by eye
C62100p100pread from the schematic by eye
×133p33pundesignated, base of Q69; read from the schematic by eye
Diodes 12
D301N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D311N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D321N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D331N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D341N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D351N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D361N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D371N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D381N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D391N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D401N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
D411N9141N914all diodes 1N914 or 1N4148; read from the schematic by eye
Transistors 14
Q592N51722N5172NPN; Mk II BC169C; with Q60 replace by an LM194CH; read from the schematic by eye
Q602N51722N5172NPN; Mk II BC169C; with Q59 replace by an LM194CH; read from the schematic by eye
Q612N42882N4288PNP; Mk II BC258B; read from the schematic by eye
Q62ME9002ME9002read from the schematic by eye
Q63??polarity not legible on the drawing; 2N5172 (NPN) or 2N4288 (PNP), Mk II BC169C or BC258B; read from the schematic by eye
Q642N51722N5172NPN; Mk II BC169C; read from the schematic by eye
Q652N51722N5172NPN; Mk II BC169C; read from the schematic by eye
Q662N51722N5172NPN; Mk II BC169C; read from the schematic by eye
Q67ME9002ME9002read from the schematic by eye
Q682N42882N4288PNP; Mk II BC258B; read from the schematic by eye
Q692N51722N5172NPN; Mk II BC169C; read from the schematic by eye
Q702N51722N5172NPN; Mk II BC169C; read from the schematic by eye
Q712N51722N5172NPN; Mk II BC169C; differential pair with Q70; read from the schematic by eye
Q722N42882N4288PNP; Mk II BC258B; read from the schematic by eye
Potentiometers 4
FrequencyB10KB10kPotentiometerVR15, 10k lin; read from the schematic by eye
Ramp LevelA5KA5kPotentiometerVR13, 5k log; read from the schematic by eye
Sine LevelA5KA5kPotentiometerVR11, 5k log; read from the schematic by eye
Sine ShapeB10KB10kPotentiometerVR38, 10k lin; read from the schematic by eye
Trimmers 3
PR15100k100kread from the schematic by eye
PR16100R100read from the schematic by eye
PR1710k10ksine purity; adjust before calibrating frequency; read from the schematic by eye