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COMET VINTAGE DISTORTION

3

PARTS LIST

This parts list is also available in a spreadsheet format which can be imported directly into Mouser for 
easy parts ordering. Mouser doesn’t carry all the parts—notably potentiometers—so the second tab lists 
all the non-Mouser parts as well as sources for each.

View parts list spreadsheet

 

→ 

PART VALUE

TYPE 

NOTES

R1

1k

Metal film resistor, 1/4W

R2

470k

Metal film resistor, 1/4W

R3

10k

Metal film resistor, 1/4W

R4

100k

Metal film resistor, 1/4W

R5

470k

Metal film resistor, 1/4W

R6

10k

Metal film resistor, 1/4W

R7

22R

Metal film resistor, 1/4W

R8

100k

Metal film resistor, 1/4W

R9

47k

Metal film resistor, 1/4W

R10

100k

Metal film resistor, 1/4W

R11

4k7

Metal film resistor, 1/4W

R12

2k2

Metal film resistor, 1/4W

R13

6k8

Metal film resistor, 1/4W

R14

2k2

Metal film resistor, 1/4W

R15

6k8

Metal film resistor, 1/4W

R16

10k

Metal film resistor, 1/4W

R17

1M

Metal film resistor, 1/4W

R18

10k

Metal film resistor, 1/4W

R19

1k

Metal film resistor, 1/4W

R20

100k

Metal film resistor, 1/4W

R21

10k

Metal film resistor, 1/4W

R22

10k

Metal film resistor, 1/4W

R23

100R

Metal film resistor, 1/4W

RPD

2M2

Metal film resistor, 1/4W

Input pulldown resistor.

LEDR

4k7

Metal film resistor, 1/4W

LED current-limiting resistor. Adjust value to change LED brightness.

C1

47n

Film capacitor, 7.2 x 2.5mm

C2

47n

Film capacitor, 7.2 x 2.5mm

C3

250pF

Ceramic capacitor, X5F

C4

OMIT

Use 100n for the Big Muff clipping mod. Leave empty otherwise.

C5

68n

Film capacitor, 7.2 x 2.5mm

C6

100pF

MLCC capacitor, NP0/C0G

C7

470n

Film capacitor, 7.2 x 3mm

Summary of Contents for COMET

Page 1: ...UMENT VERSION BOSS DS 1 Distortion A classic distortion pedal that has been in continuous production for over 40 years blending ideas from the Big Muff RAT and Distortion Distortion 1 0 0 2021 10 22 B...

Page 2: ...ame time reducing the bass and lowering the clipping threshold slightly The result is that there is a significant difference between the pre 1994 and post 1994 versions of the circuit The pre 94 versi...

Page 3: ...tor 1 4W R11 4k7 Metal film resistor 1 4W R12 2k2 Metal film resistor 1 4W R13 6k8 Metal film resistor 1 4W R14 2k2 Metal film resistor 1 4W R15 6k8 Metal film resistor 1 4W R16 10k Metal film resisto...

Page 4: ...mm red diffused Q1 2N5088 BJT transistor NPN TO 92 Substitute Original uses 2SC2248 Q2 2N5088 BJT transistor NPN TO 92 Substitute Original uses 2SC2248 Q3 2N5088 BJT transistor NPN TO 92 Substitute Or...

Page 5: ...roviding more contrast between the up and down positions IC selection The DS 1 has undergone a few other minor circuit changes after the major revision in 1994 mostly related to the IC 1994 2000 Rohm...

Page 6: ...14 GND VA GND 100k 250pF 4k7 1uF GND 2k2 470n 10n 6k8 22n 2k2 6k8 100n 10k 47n 1M VB 2N5088 VA 10k 1k 1uF GND 100k GND VB VB VB VB VB VB VB IN OUT RPD D1 C15 1 2 3 DISTORTION LEVEL 1 2 3 TONE 1 2 3 C1...

Page 7: ...e of closed frame jacks like the Switchcraft 111X If you d rather use open frame jacks please refer to the Open Frame Jack Drill Template for the top side LED hole drill size assumes the use of a 5mm...

Page 8: ...COMET VINTAGE DISTORTION 8 ENCLOSURE LAYOUT Enclosure is shown without jacks See next page for jack layout and wiring 125B...

Page 9: ...RAM 125B IN V GND N C N C OUT PCB IN GND V V JACK GND JACK OUT IN GND GND PCB OUT Shown with optional 9V battery If battery is omitted both jacks can be mono rather than one being stereo Leave the far...

Page 10: ...as suggestions based on the experience and opinions of others Projects may be used for commercial endeavors in any quantity unless specifically noted No attribution is necessary though a link back is...

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