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.
I recently updated the board with a few minor changes. You can order the updated board from PCBWay.com.
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 |
Wiring
Build your own! Or buy this one at my Reverb shop.
Finished 
Wired up 
Wiring is simple and easy 
Poss and LED mount to the PCB 
Milled the enclosure 
Soldered the parts 
Bottom side 
Top side
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