Enclosure not stated · 3 knobs

DOD FX90

Based on the DOD FX90

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

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 54 rows

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

25pF: cap at MN3101 drawn '25pf', handwriting could be 25pF or 250pF
1M variable resistor: drawn with an adjust arrow, assumed a trimmer

Ref	Value	Normalized	Type	Notes
Resistors 15
×1	51Ω	51		no designator on drawing; read from the schematic by eye
×1	100Ω	100		no designator on drawing; read from the schematic by eye
×1	3.3K	3.3k		no designator on drawing; read from the schematic by eye
×2	4.7K	4.7k		no designator on drawing; read from the schematic by eye
×12	10K	10k		no designator on drawing; read from the schematic by eye
×1	18K	18k		no designator on drawing; read from the schematic by eye
×7	22K	22k		no designator on drawing; read from the schematic by eye
×9	27K	27k		no designator on drawing; read from the schematic by eye
×2	47K	47k		no designator on drawing; read from the schematic by eye
×4	100K	100k		no designator on drawing; read from the schematic by eye
×1	150K	150k		no designator on drawing; read from the schematic by eye
×1	330K	330k		no designator on drawing; read from the schematic by eye
×2	470K	470k		no designator on drawing; read from the schematic by eye
×4	1M	1M		no designator on drawing; read from the schematic by eye
×1	2.7M	2.7M		no designator on drawing; read from the schematic by eye
Capacitors 17
×1	25pF	25p		no designator on drawing; read from the schematic by eye
×2	120pF	120p		no designator on drawing; read from the schematic by eye
×4	470pF	470p		no designator on drawing; read from the schematic by eye
×1	.0018uF	1.8n		no designator on drawing; read from the schematic by eye
×2	.0022uF	2.2n		no designator on drawing; read from the schematic by eye
×1	.005uF	5n		no designator on drawing; read from the schematic by eye
×2	.0068uF	6.8n		no designator on drawing; read from the schematic by eye
×1	.0082uF	8.2n		no designator on drawing; read from the schematic by eye
×2	.01uF	10n		no designator on drawing; read from the schematic by eye
×1	.033uF	33n		no designator on drawing; read from the schematic by eye
×1	.047uF	47n		no designator on drawing; read from the schematic by eye
×2	.1uF	100n		no designator on drawing; read from the schematic by eye
×1	.33uF	330n		no designator on drawing; read from the schematic by eye
×4	.56uF	560n		no designator on drawing; read from the schematic by eye
×3	1uF	1u		no designator on drawing; read from the schematic by eye
×4	10uF	10u		no designator on drawing; read from the schematic by eye
×2	47uF	47u		no designator on drawing; read from the schematic by eye
Diodes 3
×1	1N4001	1N4001		polarity protection; no designator on drawing; read from the schematic by eye
×3	1N4148	1N4148		no designator on drawing; read from the schematic by eye
×2	1N751A	1N751A / 5V1		zener, drawn '751A'; no designator on drawing; read from the schematic by eye
Transistors 8
TR1	2N5089	2N5089		per note TR1-TR5 = 2N5089; read from the schematic by eye
TR2	2N5089	2N5089		per note TR1-TR5 = 2N5089; read from the schematic by eye
TR3	2N5089	2N5089		per note TR1-TR5 = 2N5089; read from the schematic by eye
TR4	2N5089	2N5089		per note TR1-TR5 = 2N5089; read from the schematic by eye
TR5	2N5089	2N5089		per note TR1-TR5 = 2N5089; read from the schematic by eye
TR6	2N4124	2N4124		per note; read from the schematic by eye
TR7	J113	J113		JFET, per note; read from the schematic by eye
TR8	2N4124	2N4124		per note; read from the schematic by eye
ICs 5
×1	TL022	TL022		dual op amp, both halves used; no designator on drawing; read from the schematic by eye
×1	NE570	NE570		compander, both halves used; no designator on drawing; read from the schematic by eye
×1	MN3101	MN3101		BBD clock driver; no designator on drawing; read from the schematic by eye
×1	MN3005	MN3005		4096-stage BBD; no designator on drawing; read from the schematic by eye
×1	CD4007	CD4007		no designator on drawing; read from the schematic by eye
Potentiometers 3
Repeat	100K	100k	Potentiometer	read from the schematic by eye
Mix	100K	100k	Potentiometer	read from the schematic by eye
Delay	100K	100k	Potentiometer	470K in parallel; read from the schematic by eye
Trimmers 2
×2	5K	5k		drawn '5K TRIM'; read from the schematic by eye
×1	1M	1M		variable resistor beside the MN3101 (clock); layout shows trimmers P1-P3; read from the schematic by eye
LEDs 1
×1	LED	LED		no part number given; read from the schematic by eye