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Moog Modular System I II III 12 15 35 55

Category: Ring Mod / Synth· Full Synths Drum Synths and Misc Synth
Controls: Fixed Control Voltage · Regeneration
Price: see vendor
Tags: Full Synths Drum Synths and Misc Synth

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Schematic

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Parts list 137 rows

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Check before you build · 6 values the reader of this schematic was not sure of

904-Q*: polarity (2N3392 NPN vs 2N4058 PNP) of Q1, Q2, Q5, Q6, Q17-Q23 judged from emitter arrows on a low-res scan
904-R11-1: drawn 1.8K with 2.2K handwritten over it (select on test)
904-R45: printed .47, unit unclear
904-C3/C4/C9: voltage printed '64V', possibly 6.4V
904 CL-1: unclear component, read as a diode type
904 range caps: four groups of three counted from the ladder drawing

Ref	Value	Normalized	Type	Notes
Resistors 69
903-R1	300K	300k		903A random signal source; read from the schematic by eye
903-R2	47K	47k		903A random signal source; read from the schematic by eye
903-R3	68K	68k		903A random signal source; read from the schematic by eye
903-R4	10	10		903A random signal source; read from the schematic by eye
903-R5	5.6K	5.6k		903A random signal source; read from the schematic by eye
903-R6	22K	22k		903A random signal source; read from the schematic by eye
903-R8	680	680		903A random signal source; read from the schematic by eye
903-R9	270	270		903A random signal source; read from the schematic by eye
903-R10	470	470		903A random signal source; read from the schematic by eye
903-R11	47K	47k		903A random signal source; read from the schematic by eye
903-R12	10K	10k		903A random signal source; read from the schematic by eye
903-R13	6.8K	6.8k		903A random signal source; read from the schematic by eye
903-R14	2.7K	2.7k		903A random signal source; read from the schematic by eye
903-R15	820	820		903A random signal source; read from the schematic by eye
903-R16	330	330		903A random signal source; read from the schematic by eye
903-R17	1MEG	1M		903A random signal source; read from the schematic by eye
903-R18	180K	180k		903A random signal source; read from the schematic by eye
903-R19	680	680		903A random signal source; read from the schematic by eye
903-R20	27	27		903A random signal source; read from the schematic by eye
903-R21	47K	47k		903A random signal source; read from the schematic by eye
903-R22	33	33		903A random signal source; read from the schematic by eye
903-R23	33	33		903A random signal source; read from the schematic by eye
903-R24	33	33		903A random signal source; read from the schematic by eye
903-R25	33	33		903A random signal source; read from the schematic by eye
904-R1	100K	100k		904A low pass filter; read from the schematic by eye
904-R2	100K	100k		904A low pass filter; read from the schematic by eye
904-R3	100K	100k		904A low pass filter; read from the schematic by eye
904-R4	68K	68k		904A low pass filter; read from the schematic by eye
904-R5	68	68		904A low pass filter; read from the schematic by eye
904-R6	2.7M	2.7M		904A low pass filter; read from the schematic by eye
904-R7-1	68K	68k		904A low pass filter; read from the schematic by eye
904-R7-2	1K	1k		904A low pass filter; read from the schematic by eye
904-R9	1.3K	1.3k		904A low pass filter; read from the schematic by eye
904-R10-1	1K	1k		904A low pass filter; read from the schematic by eye
904-R10-2	27K	27k		904A low pass filter; read from the schematic by eye
904-R11-1	2.2K	2.2k		904A low pass filter; select on test for regeneration threshold; drawn 1.8K, overwritten 2.2K; read from the schematic by eye
904-R12-1	51K	51k		904A low pass filter; control node; read from the schematic by eye
904-R12-2	330	330		904A low pass filter; read from the schematic by eye
904-R12	330	330		904A low pass filter; plain R12 printed besides subscripted R12-1/R12-2; read from the schematic by eye
904-R14	100	100		904A low pass filter; read from the schematic by eye
904-R15	10K	10k		904A low pass filter; read from the schematic by eye
904-R16	1K	1k		904A low pass filter; read from the schematic by eye
904-R18	10K	10k		904A low pass filter; read from the schematic by eye
904-R19	100	100		904A low pass filter; read from the schematic by eye
904-R20	8.2K	8.2k		904A low pass filter; read from the schematic by eye
904-R21	1K	1k		904A low pass filter; read from the schematic by eye
904-R23	470	470		904A low pass filter; read from the schematic by eye
904-R25-1	680	680		904A low pass filter; read from the schematic by eye
904-R26	220	220		904A low pass filter; read from the schematic by eye
904-R27	220	220		904A low pass filter; read from the schematic by eye
904-R28	220	220		904A low pass filter; read from the schematic by eye
904-R29	68	68		904A low pass filter; read from the schematic by eye
904-R30	750	750		904A low pass filter; read from the schematic by eye
904-R31	47K	47k		904A low pass filter; read from the schematic by eye
904-R32	33K	33k		904A low pass filter; read from the schematic by eye
904-R33	330K	330k		904A low pass filter; read from the schematic by eye
904-R34	3.3K	3.3k		904A low pass filter; read from the schematic by eye
904-R35	680	680		904A low pass filter; read from the schematic by eye
904-R36	2.2K	2.2k		904A low pass filter; read from the schematic by eye
904-R37	470	470		904A low pass filter; read from the schematic by eye
904-R38	68	68		904A low pass filter; read from the schematic by eye
904-R39	680	680		904A low pass filter; read from the schematic by eye
904-R41	33K	33k		904A low pass filter; read from the schematic by eye
904-R42	330	330		904A low pass filter; read from the schematic by eye
904-R43	47K	47k		904A low pass filter; read from the schematic by eye
904-R44-1	10	10		904A low pass filter; read from the schematic by eye
904-R44-2	330K	330k		904A low pass filter; read from the schematic by eye
904-R45	.47	0.47		904A low pass filter; value printed .47, unit unclear; read from the schematic by eye
904-R46	33	33		904A low pass filter; read from the schematic by eye
Capacitors 28
903-C1	400uF	400u		903A; read from the schematic by eye
903-C2	400uF	400u		903A; read from the schematic by eye
903-C3	2.5uF	2.5u		903A; read from the schematic by eye
903-C4	220pF	220p		903A; read from the schematic by eye
903-C5	200uF	200u		903A; read from the schematic by eye
903-C6	32uF	32u		903A; read from the schematic by eye
903-C7	.005uF	5n		903A; read from the schematic by eye
903-C8	400uF	400u		903A; read from the schematic by eye
903-C9	400uF	400u		903A; read from the schematic by eye
903-C10	0.27uF	270n		903A; read from the schematic by eye
903-C11	0.12uF	120n		903A; read from the schematic by eye
903-C12	0.039uF	39n		903A; read from the schematic by eye
903-C13	0.018uF	18n		903A; read from the schematic by eye
903-C14	.005uF	5n		903A; read from the schematic by eye
903-C15	2.5uF	2.5u		903A; read from the schematic by eye
903-C16	32uF	32u		903A; read from the schematic by eye
904-C1	.005uF	5n		904A; read from the schematic by eye
904-C2	100pF	100p		904A; drawn 100mmf; read from the schematic by eye
904-C3	10uF	10u		904A; voltage printed 64V; read from the schematic by eye
904-C4	10uF	10u		904A; voltage printed 64V; read from the schematic by eye
904-C5	80uF	80u		904A; 25V; read from the schematic by eye
904-C6	400uF	400u		904A; 25V; read from the schematic by eye
904-C7	2.5uF	2.5u		904A; read from the schematic by eye
904-C8	2.5uF	2.5u		904A; read from the schematic by eye
904-C9	10uF	10u		904A; voltage printed 64V; read from the schematic by eye
×4	1.2uF	1.2u		904A ladder range caps, range 1, one per ladder stage (4 stages); read from the schematic by eye
×4	0.3uF	300n		904A ladder range caps, range 2, one per ladder stage (4 stages); read from the schematic by eye
×4	0.075uF	75n		904A ladder range caps, range 3, one per ladder stage (4 stages); read from the schematic by eye
Diodes 4
903-D1	SD10	SD10		903A noise source diode; read from the schematic by eye
×2	1N4004	1N4004		904A supply diodes; read from the schematic by eye
×1	Diode	DIODE		904A output buffer; no part number given; read from the schematic by eye
×2	CL-1	CL-1		904A, at Q6 and in the output buffer; drawn as a diode marked CL-1; read from the schematic by eye
Transistors 27
903-Q1	2N3392	2N3392		903A; all transistors 2N3392; read from the schematic by eye
903-Q2	2N3392	2N3392		903A; all transistors 2N3392; read from the schematic by eye
903-Q3	2N3392	2N3392		903A; all transistors 2N3392; read from the schematic by eye
903-Q4	2N3392	2N3392		903A; all transistors 2N3392; read from the schematic by eye
904-Q1	2N4058	2N4058		904A PNP; read from the schematic by eye
904-Q2	2N4058	2N4058		904A PNP; read from the schematic by eye
904-Q3	2N3392	2N3392		904A NPN; read from the schematic by eye
904-Q4	2N3392	2N3392		904A NPN; read from the schematic by eye
904-Q5	2N3392	2N3392		904A NPN; read from the schematic by eye
904-Q6	2N4058	2N4058		904A PNP; read from the schematic by eye
904-Q7	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q8	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q9	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q10	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q11	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q12	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q13	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q14	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q15	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q16	2N3392	2N3392		904A NPN; filter ladder; read from the schematic by eye
904-Q17	2N3392	2N3392		904A NPN; read from the schematic by eye
904-Q18	2N4058	2N4058		904A PNP; read from the schematic by eye
904-Q19	2N3392	2N3392		904A NPN; read from the schematic by eye
904-Q20	2N3392	2N3392		904A NPN; read from the schematic by eye
904-Q21	2N4058	2N4058		904A PNP; read from the schematic by eye
904-Q22	2N4058	2N4058		904A PNP; read from the schematic by eye
904-Q23	2N3392	2N3392		904A NPN; read from the schematic by eye
Potentiometers 2
Fixed Control Voltage	5K	5k	Potentiometer	904A R11-2; read from the schematic by eye
Regeneration	50K	50k	Potentiometer	904A R22, marked rev. audio; read from the schematic by eye
Trimmers 6
903-R7	25K	25k		903A Gain Set; read from the schematic by eye
904-R8	1K	1k		904A Scale trimpot; read from the schematic by eye
904-R17	10	10		904A wirewound trimpot; read from the schematic by eye
904-R24	2.5K	2.5k		904A 2.0 V Level trimpot (per test procedure); read from the schematic by eye
904-R25	?	?		904A wirewound trimpot; no value printed; read from the schematic by eye
904-R40	1K	1k		904A zero trimpot; read from the schematic by eye
Switches 1
904-S1	SP3T	SP3T		904A Range switch, multi-deck, 3 positions; read from the schematic by eye