Enclosure not stated · 2 knobs
MXR Blue BoxVerified
Based on the MXR Blue Box· 6 other boards clone it
- Category
- Octave / Pitch
- Build
- Vero· 19×23· 26 cuts, 17 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- MXR, Octave
From the post
So. It's April already. This one is the last post from me for today. I do believe there lots of you who have been waiting to get your hands on a doable octave down circuit. Here it is. You should probably try this with a fuzz in front of it :)
Edit! Here's a link to John K's modded layout, which will sound cleaner and has 1/2 octaves on a switch:
http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/BlueBox/MXR_BlueBox-Final-Verified.png
Huge thank you John!
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 22 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×11 | 56K | 56k | read from the layout by eye | |
| ×1 | 56K | 56k | 56K* at the bottom, a link in some units; read from the layout by eye | |
| ×5 | 1M | 1M | read from the layout by eye | |
| ×3 | 10K | 10k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 330pF | 330p | read from the layout by eye | |
| ×2 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D1 | 1N914 | 1N914 | read from the layout by eye | |
| D2 | 1N914 | 1N914 | read from the layout by eye | |
| Transistors 1 | ||||
| ×3 | PN2222 | PN2222 | Transistors are PN2222, 2N3904 or similar; read from the layout by eye | |
| ICs 2 | ||||
| IC1 | JRC4558 | JRC4558 | read from the layout by eye | |
| IC2 | CD4013 | CD4013 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Blend | B25K | B25k | Potentiometer | read from the layout by eye |
| Level | B50K | B50k | Potentiometer | read from the layout by eye |
Other boards based on the MXR Blue Box
- MXR Blue Box Dirtbox Layouts
- MXR Blue Box w. mods Dirtbox Layouts
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- Blue Box Octave Fuzz PCBWay: Glory to Ukraine
- Mantle Fuzz PedalPCB · 125B · $8.00
- MXR Blue Box Tonepad · $11.00