Enclosure not stated · 4 knobs
Paul Trombetta Designs Bone MachineVerified
Based on the Paul Trombetta Designs Bone Machine
From the post
Here is a great fuzz pedal similar to the Rockett WTF (which Paul also designed).
A couple of capacitors are unknown.
You need to test different values (shouldn't be too difficult to find the correct ones).
Schematic and original FSB thread are available here.
Paul has also added a Si/Ge transistors switch to his V.2
I've added a second layout with the new extra switch but it's all guesswork.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 24 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- Q2 part number printed clearly as 2n2097A (Ge PNP), unusual part number
- Q1 is taken as the transistor under the '5088' label above the board; it carries no designator
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×1 | 39K | 39k | read from the layout by eye | |
| ×1 | 2K | 2k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×2 | 560K | 560k | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 22n | 22n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×1 | 2n2 | 2.2n | read from the layout by eye | |
| ×1 | 47p | 47p | read from the layout by eye | |
| ×1 | 1n | 1n | read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| C2 | ? | ? | value not given; legend: test values; read from the layout by eye | |
| C4 | ? | ? | value not given; legend: test values; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| D3 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N5088 | 2N5088 | printed 5088; read from the layout by eye | |
| Q2 | 2N2097A | 2N2097A | Ge PNP; read from the layout by eye | |
| Potentiometers 4 | ||||
| Mood | B50K | B50k | Potentiometer | read from the layout by eye |
| Bore | B50K | B50k | Potentiometer | read from the layout by eye |
| Volume | B100K | B100k | Potentiometer | read from the layout by eye |
| Gain | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 2 | ||||
| Range | SPDT | SPDT | toggle, Switch 1; read from the layout by eye | |
| Tone | SPDT on/off/on | SPDT ON/OFF/ON | toggle, Switch 2; read from the layout by eye | |