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8-Ball

FX TYPE: Overdrive 

Based on the Marshall® Blues Breaker™ 

© 2015 madbeanpedals 

 

1.95” W x 1.91”H 

2015 update: Minor 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. 

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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