Enclosure not stated · 3 knobs

MXR Analog Delay 3

Based on the MXR Analog Delay· 2 other boards clone it

Category: Delay· Delay Echo and Samplers
Controls: Mix · Regen · Delay Time
Price: see vendor
Tags: Delay Echo and Samplers

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 121 rows

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Check before you build · 16 values the reader of this schematic was not sure of

R33: could be 8.6K; 5.6K most likely
R42: could be 8.2K
R49: could be 8.1K or 5.1K
C5: electrolytic; drawn '2.2' or '22', smudged
C10: could be 30pF
C14: could be .0028
C16: could be 180pF
C17: drawn '1', leading point unclear; could be 1uF
C24: could be .0015
C30: drawn '1', leading point unclear; could be 1uF
C31: drawn '1', leading point unclear; could be 1uF
C32: drawn '1', leading point unclear; could be 1uF
R6/R8: the input 10K and the 150K beside R9 have similar-looking designators (R6 vs R8)
Q1-Q5: ZTX108, could be ZTX109
CR3: designator smudged
S1: pole count inferred from the dashed linkage

Ref	Value	Normalized	Type	Notes
Resistors 56
R1	43K	43k		read from the schematic by eye
R2	100	100		read from the schematic by eye
R3	10K	10k		read from the schematic by eye
R4	10K	10k		read from the schematic by eye
R5	1M	1M		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	150K	150k		read from the schematic by eye
R9	150K	150k		read from the schematic by eye
R10	470K	470k		read from the schematic by eye
R11	130K	130k		read from the schematic by eye
R12	30K	30k		read from the schematic by eye
R13	1K	1k		read from the schematic by eye
R14	47K	47k		read from the schematic by eye
R16	4.7K	4.7k		read from the schematic by eye
R17	1K	1k		read from the schematic by eye
R18	47K	47k		read from the schematic by eye
R19	240K	240k		read from the schematic by eye
R20	4.7K	4.7k		read from the schematic by eye
R21	470K	470k		read from the schematic by eye
R22	2K	2k		read from the schematic by eye
R23	47K	47k		read from the schematic by eye
R24	4.7K	4.7k		read from the schematic by eye
R25	150	150		read from the schematic by eye
R26	6.8K	6.8k		read from the schematic by eye
R27	39K	39k		read from the schematic by eye
R28	10K	10k		read from the schematic by eye
R30	10K	10k		read from the schematic by eye
R31	470K	470k		read from the schematic by eye
R32	270	270		read from the schematic by eye
R33	5.6K	5.6k		could be 8.6K; 5.6K most likely; read from the schematic by eye
R34	3.3K	3.3k		read from the schematic by eye
R35	270	270		read from the schematic by eye
R36	10K	10k		read from the schematic by eye
R37	68K	68k		read from the schematic by eye
R38	12K	12k		read from the schematic by eye
R39	12K	12k		read from the schematic by eye
R40	270	270		read from the schematic by eye
R41	1K	1k		read from the schematic by eye
R42	3.3K	3.3k		could be 8.2K; read from the schematic by eye
R43	1K	1k		read from the schematic by eye
R44	2K	2k		read from the schematic by eye
R45	10	10		10 ohms, supply feed to the BBD; read from the schematic by eye
R46	200K	200k		read from the schematic by eye
R47	3.9K	3.9k		read from the schematic by eye
R48	10K	10k		read from the schematic by eye
R49	9.1K	9.1k		could be 8.1K or 5.1K; read from the schematic by eye
R50	2K	2k		read from the schematic by eye
R51	100K	100k		read from the schematic by eye
R52	3.9K	3.9k		read from the schematic by eye
R53	10K	10k		read from the schematic by eye
R54	5.6K	5.6k		read from the schematic by eye
R57	100K	100k		read from the schematic by eye
R58	43K	43k		read from the schematic by eye
R63	22K	22k		read from the schematic by eye
R67	2.2K	2.2k		read from the schematic by eye
Capacitors 38
C1	.033uF	33n		read from the schematic by eye
C2	15uF	15u		electrolytic; read from the schematic by eye
C3	100pF	100p		read from the schematic by eye
C4	.033uF	33n		read from the schematic by eye
C5	2.2uF	2.2u		electrolytic; drawn '2.2' or '22', smudged; read from the schematic by eye
C6	4.7uF	4.7u		electrolytic; read from the schematic by eye
C7	.0047uF	4.7n		read from the schematic by eye
C8	.047uF	47n		read from the schematic by eye
C9	750pF	750p		read from the schematic by eye
C10	50pF	50p		could be 30pF; read from the schematic by eye
C11	1uF	1u		electrolytic; read from the schematic by eye
C12	.01uF	10n		read from the schematic by eye
C13	.0047uF	4.7n		read from the schematic by eye
C14	.0022uF	2.2n		could be .0028; read from the schematic by eye
C15	.0022uF	2.2n		read from the schematic by eye
C16	150pF	150p		could be 180pF; read from the schematic by eye
C17	.1uF	100n		drawn '1', leading point unclear; could be 1uF; read from the schematic by eye
C18	62pF	62p		read from the schematic by eye
C19	62pF	62p		read from the schematic by eye
C20	.001uF	1n		read from the schematic by eye
C21	470pF	470p		read from the schematic by eye
C22	470pF	470p		read from the schematic by eye
C23	300pF	300p		read from the schematic by eye
C24	.0018uF	1.8n		could be .0015; read from the schematic by eye
C25	15uF	15u		electrolytic; read from the schematic by eye
C26	47uF	47u		electrolytic; read from the schematic by eye
C27	.001uF	1n		read from the schematic by eye
C28	.033uF	33n		read from the schematic by eye
C29	15uF	15u		electrolytic; read from the schematic by eye
C30	.1uF	100n		drawn '1', leading point unclear; could be 1uF; read from the schematic by eye
C31	.1uF	100n		drawn '1', leading point unclear; could be 1uF; read from the schematic by eye
C32	.1uF	100n		drawn '1', leading point unclear; could be 1uF; read from the schematic by eye
C33	.033uF	33n		read from the schematic by eye
C34	15uF	15u		electrolytic; read from the schematic by eye
C35	33pF	33p		read from the schematic by eye
C36	30pF	30p		read from the schematic by eye
C37	400uF	400u		electrolytic, supply input; read from the schematic by eye
×1	300pF	300p		undesignated, across R4; marked 'Note 3' (wiring assembly); read from the schematic by eye
Diodes 3
CR1	1N914	1N914		read from the schematic by eye
CR2	1N914	1N914		read from the schematic by eye
CR3	1N914	1N914		designator smudged, could be CR8; read from the schematic by eye
Transistors 5
Q1	ZTX108	ZTX108		read from the schematic by eye
Q2	ZTX108	ZTX108		read from the schematic by eye
Q3	ZTX108	ZTX108		read from the schematic by eye
Q5	ZTX108	ZTX108		read from the schematic by eye
Q6	2N4126	2N4126		PNP; read from the schematic by eye
ICs 10
U1	4558	4558		dual op amp; read from the schematic by eye
U2	4558	4558		dual op amp; read from the schematic by eye
U3	4558	4558		dual op amp; read from the schematic by eye
U4	CD4016	CD4016		quad bilateral switch; read from the schematic by eye
U5	4558	4558		dual op amp; read from the schematic by eye
U6	CD4016	CD4016		quad bilateral switch; read from the schematic by eye
U7	CD4013	CD4013		dual D flip-flop, drawn 4013A; read from the schematic by eye
U8	CD4001	CD4001		quad NOR; read from the schematic by eye
J1	RS101	RS101		Reticon RS101 bucket-brigade delay line; read from the schematic by eye
VR1	340T12	340T12		12V regulator (LM340T-12); read from the schematic by eye
Potentiometers 3
Mix	50K	50k	Potentiometer	R65; read from the schematic by eye
Regen	50K	50k	Potentiometer	R66; read from the schematic by eye
Delay Time	50K	50k	Potentiometer	R64; read from the schematic by eye
Trimmers 4
R59	200K	200k		Level; read from the schematic by eye
R60	2K	2k		Balance; read from the schematic by eye
R61	20K	20k		Bias; read from the schematic by eye
R62	20K	20k		Clock; read from the schematic by eye
Switches 1
S1	DPDT	DPDT		Output / Delay Only switching, two ganged sections; read from the schematic by eye
LEDs 1
DS1	LED	LED		no part number given; read from the schematic by eye

Other boards based on the MXR Analog Delay

MXR Analog Delay 1 Experimentalists Anonymous
MXR Analog Delay 2 Experimentalists Anonymous