Enclosure not stated · 2 knobs
Runoffgroove "Big Grace"Verified
Based on the Run Off Groove Big Daddy and the Run Off Groove Grace Overdrive· 4 other boards clone one of them
- Category
- Distortion
- Build
- Vero· 15×11· 13 cuts, 5 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Distortion, Overdrive, Runoffgroove
From the post
Big Daddy and Grace circuits have this at the end of their document page: The two circuits are very similar and it may be possible to use a switching system to alternate between the buffer and the gain stage versions. (ROG)
Now did i really have a choice? :) Instead of using some monstrous 4PDT switch, i thought it would be just easier to accomodate both, the JFET buffer and JFET gain stages, on the same board and use 2PDT switch to switch between them. Takes more components, but i think you can build three of these circuits for the price of a single four poled switch.. So. I dubbed it, the "Big Grace".
Demo of his build by Madferret. Thanks mate :o)
New demos by Geiri.
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 14 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×2 | 4.7M | 4.7M | read from the layout by eye | |
| ×2 | 15K | 15k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 4 | ||||
| ×2 | 6.8nF | 6.8n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N4001 | 1N4001 | polarity protection (1N4001 or 1N5817); read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | J201 | J201 | JFET; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | LM386 | LM386 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Drive | B1K | B1k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Big Daddy/Grace | DPDT on/on | DPDT ON/ON | toggle; read from the layout by eye | |
Other boards based on the Run Off Groove Big Daddy or the Run Off Groove Grace Overdrive
- Run Off Groove Big Daddy/Grace Effects Layouts (blog) · 1590A
- FuzzPup Daddy Grace Drive/Distortion Fuzz Dog · 1590A · £21.60
- Runoffgroove Big Daddy Tagboard Effects
- Runoffgroove Grace Overdrive Tagboard Effects