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R1

2M2

C1

56n

D1, D2

*see notes

R2

1M

C2

47pF

D3 - D6

1n914

R3

3k3

C3

15n

D7

1N5817

R4

3k3

C4

56n

R5

4k7

C5

220n

IC1

4558

R6

4k7

C6

220n

R7

4k7

C7

10n

CLIP

DPDT

R8

270k

C8

10n

R9

6k8

C9

1uF

GAIN

250kB

R10

1k

C10

100uF

TONE

25kB

R11

6k8

C11

100uF

VOL

100kA

R12

1M

C12

100n

R13

47k

R14

47k

R15

4k7

R16

680k

Resistors

Caps

Diodes

IC 

Switch

Pots

B.O.M.

 

 
 

 

 

Value

QTY

Type

Rating

1k

1

Metal / Carbon Film

1/4W

3k3

2

Metal / Carbon Film

1/4W

4k7

4

Metal / Carbon Film

1/4W

6k8

2

Metal / Carbon Film

1/4W

47k

2

Metal / Carbon Film

1/4W

270k

1

Metal / Carbon Film

1/4W

680k

1

Metal / Carbon Film

1/4W

1M

2

Metal / Carbon Film

1/4W

2M2

1

Metal / Carbon Film

1/4W

47pF

1

Ceramic / Mica

16v or more

10n

2

Film

16v or more

15n

1

Film

16v or more

56n

2

Film

16v or more

100n

1

Film

16v or more

220n

2

Film

16v or more

1uF

1

Film

16v or more

100uF

2

Electrolytic

16v or more

1n914

4

RED LED 3MM

2

Alt: 1N4001

1N5817

1

4558

1

Or other Dual Op-Amp

DPDT

1

PCB or Solder Lug

On/On

250kB

1

PCB Mount

16mm

25kB

1

PCB Mount

16mm

100kA

1

PCB Mount

16mm

Shopping List

 

 
 
 
 
 
 

Summary of Contents for 8-Ball

Page 1: ...layout tweaks Clip switch can now be either solder lug or PCB pin mount type DPDT Terms of Use You are free to use purchased 8 Ball circuit boards for both DIY and small commercial operations You may not offer 8 Ball PCBs for resale or as part of a kit in a commercial fashion Peer to peer re sale is of course okay ...

Page 2: ... Carbon Film 1 4W 4k7 4 Metal Carbon Film 1 4W 6k8 2 Metal Carbon Film 1 4W 47k 2 Metal Carbon Film 1 4W 270k 1 Metal Carbon Film 1 4W 680k 1 Metal Carbon Film 1 4W 1M 2 Metal Carbon Film 1 4W 2M2 1 Metal Carbon Film 1 4W 47pF 1 Ceramic Mica 16v or more 10n 2 Film 16v or more 15n 1 Film 16v or more 56n 2 Film 16v or more 100n 1 Film 16v or more 220n 2 Film 16v or more 1uF 1 Film 16v or more 100uF ...

Page 3: ...3 ...

Page 4: ...1590B Drill Template 4 44 W x 6 44 H ...

Page 5: ...5 Wiring Guide The indicator LED can be soldered directly to the PCB The enclosure grounds the output jack If testing outside an enclsoure with the jacks wired you must ground the output jack sleeve ...

Page 6: ...t the component value level The stock version has been re voiced to a thicker meaty overdrive via some cap value tweaks The 8 Ball also has more gain on tap Finally the traditionally low output of the stock unit has been increased slightly Note that the 8 Ball is still on the low side of total output so you should expect unity volume at around 1 to 2 o clock on the Volume knob Notes D1 and D2 are ...

Page 7: ...7 Build Pic prototype board ...

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