Behringer - BO100 Blues Overdrive  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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fws
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Post by fws »

Said to be Boss BD-2 Blues Driver copy, I got both and say they sound different. Behringer is all about mid, while Boss has that treble boost it is known for. Below are complete photos of both sides of PCB, the IC is 4558 (not marked as Behringer's made Cool Audio ones).

Boss BD-2 schematic
http://nakora.org/files/schematy/boss_b ... driver.pdf
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IMG_0321.jpg
IMG_0322.jpg
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The markings on backside should be visible, as for front T2 reads K184 GR 5 E, T1 looks same and has 184 on PCB, all I can make out of D1 is that it ends with like 07. The only markings on pots are FC104A for level and FC103B for tone, all three made by ALPS.

C1 1uF
C2 10uF
C3 10uF
C4 10uF
C5 100uF
C6 47uF
C7 10uF
C8 10uF
C9 100uF
C10 47uF
C11 47uF
C12 possibly 10uF, all I can see is what I think is 0, and there isnt enough space for 100

I can upload some higher resolution photos if needed.

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RnFR
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Post by RnFR »

Thanks for the contribution!
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Post by modman »

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BO100_SCHEMATICS_REV_C.pdf
Behringer BO-100 Blues Overdrive schematic
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