Enclosure not stated · 3 knobs

Maestro Envelope Modifier

Based on the Maestro Envelope Modifier

Category: Wah / Envelope· Guitar Synth and Misc Signal Shapers
Controls: Sensitivity · Decay · Attack
Price: see vendor
Tags: Guitar Synth and Misc Signal Shapers

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 81 rows

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Check before you build · 2 values the reader of this schematic was not sure of

R40: no control name; listed as a trimmer
Q1-Q13: types not given and the scan is too small to confirm every arrow direction

Ref	Value	Normalized	Type	Notes
Resistors 36
R1	180K	180k		read from the schematic by eye
R2	200K	200k		read from the schematic by eye
R3	56K	56k		read from the schematic by eye
R4	1K	1k		read from the schematic by eye
R5	1K	1k		read from the schematic by eye
R6	10K	10k		read from the schematic by eye
R7	10K	10k		read from the schematic by eye
R8	10K	10k		read from the schematic by eye
R9	1.5M	1.5M		read from the schematic by eye
R10	10K	10k		read from the schematic by eye
R11	470	470		read from the schematic by eye
R13	15K	15k		read from the schematic by eye
R14	390K	390k		read from the schematic by eye
R15	2.4K	2.4k		read from the schematic by eye
R16	10K	10k		read from the schematic by eye
R17	47K	47k		read from the schematic by eye
R18	1.5M	1.5M		read from the schematic by eye
R19	82K	82k		read from the schematic by eye
R20	1K	1k		read from the schematic by eye
R21	220K	220k		read from the schematic by eye
R22	100K	100k		read from the schematic by eye
R23	10K	10k		read from the schematic by eye
R24	330K	330k		read from the schematic by eye
R25	10K	10k		read from the schematic by eye
R26	200K	200k		read from the schematic by eye
R27	100K	100k		read from the schematic by eye
R28	10K	10k		read from the schematic by eye
R29	10K	10k		read from the schematic by eye
R30	4.7K	4.7k		read from the schematic by eye
R31	390K	390k		read from the schematic by eye
R32	6.8K	6.8k		read from the schematic by eye
R33	47K	47k		read from the schematic by eye
R34	680K	680k		read from the schematic by eye
R35	2K	2k		read from the schematic by eye
R36	6.8K	6.8k		read from the schematic by eye
R37	4.7K	4.7k		read from the schematic by eye
Capacitors 17
C1	.05uF	50n		read from the schematic by eye
C2	22uF	22u		electrolytic, 16V; read from the schematic by eye
C3	1uF	1u		electrolytic, 50V; read from the schematic by eye
C4	.025uF	25n		read from the schematic by eye
C5	1uF	1u		50V; read from the schematic by eye
C6	22uF	22u		electrolytic, 16V; read from the schematic by eye
C7	.047uF	47n		read from the schematic by eye
C8	.01uF	10n		read from the schematic by eye
C9	22uF	22u		electrolytic, 16V; read from the schematic by eye
C10	.01uF	10n		read from the schematic by eye
C11	.22uF	220n		read from the schematic by eye
C12	.047uF	47n		read from the schematic by eye
C13	.047uF	47n		read from the schematic by eye
C14	22uF	22u		electrolytic, 10V; read from the schematic by eye
C15	3.3uF	3.3u		electrolytic, 35V; read from the schematic by eye
C16	10uF	10u		electrolytic, 35V; read from the schematic by eye
C17	6.8uF	6.8u		electrolytic, 16V; read from the schematic by eye
Diodes 8
CR1	Diode	DIODE		no part number given; read from the schematic by eye
CR2	Diode	DIODE		no part number given; read from the schematic by eye
CR3	Diode	DIODE		no part number given; read from the schematic by eye
CR4	Diode	DIODE		no part number given; read from the schematic by eye
CR5	Diode	DIODE		no part number given; read from the schematic by eye
CR6	Diode	DIODE		no part number given; read from the schematic by eye
CR7	Diode	DIODE		no part number given; read from the schematic by eye
CR8	Diode	DIODE		no part number given; read from the schematic by eye
Transistors 13
Q1	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q2	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q3	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q4	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q5	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q6	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q7	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q8	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q9	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q10	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q11	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q12	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Q13	?	?		bipolar transistor, NPN by symbol, type not given; read from the schematic by eye
Opto 1
P1	?	?		LED/LDR optocoupler, type not given; read from the schematic by eye
Potentiometers 3
Sensitivity	25K	25k	Potentiometer	R39; read from the schematic by eye
Decay	B100K	B100k	Potentiometer	R42, drawn 100K LIN; read from the schematic by eye
Attack	B1M	B1M	Potentiometer	R41, drawn 1M LIN; read from the schematic by eye
Trimmers 2
R38	100K	100k		labeled TRIM; read from the schematic by eye
R40	B280K	280k		drawn 280K LIN, unlabeled internal adjustment; could be a panel pot; read from the schematic by eye
Switches 1
S2	SPDT	SPDT		TRS BOW / PERC mode selector; read from the schematic by eye