UBE Screamer PCB v1.1

This is the second version of the UBE Screamer board. This version fixes a mistake with the reverse polarity diode. I’m calling this ready for public consumption and will add it to the OSH Park projects pages soon.

The enclosure is grounded through the jacks. The bottom cover though doesn’t make an electrical connection to the main enclosure body due to the powder coat. I used a drill bit to remove the powder coat inside the count sink recess, this allows the screw to make contact with the back cover for full shielding.

Order PCBs at OSH Park

Partslist

Capacitors
C1      10n
C2      2n2
C3        470n
C4       100n
C5        1n5
C6        150p
C7         100n
C8       100n
C9        100n
C10       100u
Diodes
D1        1n4148
D2         1n4148
D3         1n5817
D4             LED
IC
IC1      CD4049UBE
Resistors
R1       1M 1M
R2         470k
R3          470k
R4        100k
R5          100k
R6        10k
R7        1m
R8       10k
R9        100k
R10       100k
R11       100k
R12       220k
R13      Rx  (see note)
R14       330
R15         RLED
Pots
TONE   B500k 16MM      
VOL      B100k 16MM    
GAIN    B500k 16MM
UBE Screamer Parts list

Wiring

Build your own! Check out my OSH Park projects page. Or buy this one at my Reverb shop.

UBE Screamer by RunOffGroove

This UBE Screamer by RunOffGroove.com is a unique twist on the venerable Ibanez Tube Screamer TS-808. It replaces the op-amps and transistor stages with a single hex inverter using an inverter in place of each op-amp and transistor. This has a great sound that stands up to all of the other overdrives. Read more about it over at RunOffGroove.com

Well worth the effort, build it yourself! I’ve created a public project at OSH Park. Order boards and follow the build docs.