Enclosure not stated · 3 knobs
Sola Sound MKIV TonebenderVerified
Based on the Sola Sound MKIV Tonebender
From the post
I think the best description of the differences between the MKIII & MKIV tonebender comes from non-other than the captain:
The origins. Tone Bender MKIII, Tone Bender MKIV. Same party different frock. Aside from the obvious differences in the enclosure type of these pedals any true solid definition of which is what in regards to circuit type is and will always be a little bit of an ambiguous subject. The way I always made sense of it in my head was in regards to the biasing. The early MKIII's were choppy, heavy, clumsy, a fuzzy lump hammer. The later MKIV's were smooth, dynamic, articulate, a distorted boxing glove. In between, you have a foggy transitional period. Even with the those definitions in place it never always runs true.
Couldn't find a video of an original, so I figure the best example of the pedal is going to be the DAM version. Want to be clear, this layout is for an original Tonebender MKIV not the DAM one as travis pointed out.
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 19 rows
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Check before you build · 2 values the reader of this layout was not sure of
- 6.4uF electrolytic at column 12: printed clearly, unusual value
- 25uF electrolytic at top left: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×5 | 10k | 10k | read from the layout by eye | |
| ×1 | 3.3k | 3.3k | read from the layout by eye | |
| ×1 | 18k | 18k | read from the layout by eye | |
| ×1 | 100k | 100k | read from the layout by eye | |
| ×1 | 220k | 220k | read from the layout by eye | |
| ×1 | 680k | 680k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 220pF | 220p | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 6.4uF | 6.4u | electrolytic; read from the layout by eye | |
| ×1 | 25uF | 25u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N270 | 1N270 | Ge diode; read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | PNP Ge | PNP GE | legend: Q1-Q3: PNP Ge, type not given; read from the layout by eye | |
| Q2 | PNP Ge | PNP GE | legend: Q1-Q3: PNP Ge, type not given; read from the layout by eye | |
| Q3 | PNP Ge | PNP GE | legend: Q1-Q3: PNP Ge, type not given; read from the layout by eye | |
| Potentiometers 3 | ||||
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Sustain | B100K | B100k | Potentiometer | read from the layout by eye |