SD-1 Mods

Wampler's TS808 Mod:
R1- 1K
C1 - .022UF
R2 - 510K
C2 - 1UF
R4 - 10K
R5 - 51K
GAIN POT - CHANGE TO 500K AUDIO TAPER
D6 - JUMPER
D4 - 1S1588, MA150, OR KEEP STOCK
D5 - 1S1588, MA150, OR KEEP STOCK
R7 - 1K
C4 - .22UF
C6 - REMOVE (DON’T JUMPER)
R9 - 1K
C5 - .22UF
R8 - 220 OHM
R10 - 1K
VOLUME POT - CHANGE TO 100K LINEAR TAPER
C8 - .1UF
R16 - 100 OHM
R17 - 10K
Opamp - If your SD-1 doesn’t have a 4558 type, change it.

More Bass Mod:
C3 - .1UF
R6 - 4.7K

Erik Hansen's TS808 Mod:
C7 - 1UF
C10 - 10UF

Other Mods:
R5 - 10K (Apparently cleans up a lot better with drive all the way down)
R5 - 4.7K ("Better low gain")