Enclosure not stated · 4 knobs
Pearl OD-5 Overdrive
Based on the Pearl OD-05 Overdrive· 4 other boards clone it
From the post
Do not start building this one yet as it contains errors. Norwichbadger's amazing footwork on the comments will tell you how to fix yours, if you've built it already. I'll be fixing the layout or redrawing it at some point...
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Olav's relentless requesting took a few things before i got it done. First, he stated that he's happy with the PCB layout he found on the internet. :) And about four months. Told you it was going to be huge.
Transistor pins are once again made for modern everyday transistors like 2N3904, 2N5088 and so on. Original unit has 2SC2240s in it, so if you want to use those, just mind the pinout. Anyway. Here it is. Let's just hope it is correct. And happy easter for everyone!
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 35 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×3 | 1K | 1k | read from the layout by eye | |
| ×5 | 10K | 10k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×7 | 22K | 22k | read from the layout by eye | |
| ×2 | 2.2K | 2.2k | read from the layout by eye | |
| ×2 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 680K | 680k | read from the layout by eye | |
| ×1 | 270K | 270k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| Capacitors 11 | ||||
| ×1 | 470pF | 470p | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 15nF | 15n | read from the layout by eye | |
| ×1 | 33nF | 33n | read from the layout by eye | |
| ×1 | 68nF | 68n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×3 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 4 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| D3 | 1N4001 | 1N4001 | read from the layout by eye | |
| D4 | 5.1V zener | 5V1 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | 2N3904 | 2N3904 | 2N3904, 2N5088 or similar (original has 2SC2240s); read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | 2N3904, 2N5088 or similar (original has 2SC2240s); read from the layout by eye | |
| Q3 | 2N3904 | 2N3904 | 2N3904, 2N5088 or similar (original has 2SC2240s); read from the layout by eye | |
| Q4 | 2N3904 | 2N3904 | 2N3904, 2N5088 or similar (original has 2SC2240s); read from the layout by eye | |
| ICs 2 | ||||
| IC1 | JRC4558 | JRC4558 | read from the layout by eye | |
| IC2 | JRC4558 | JRC4558 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Eq Gain | B10K | B10k | Potentiometer | read from the layout by eye |
| Frequency | C100K | C100k | Potentiometer | dual; read from the layout by eye |
| Overdrive | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | B10K | B10k | Potentiometer | read from the layout by eye |
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