Enclosure not stated · 2 knobs
Smallsound/Bigsound Sparkle MotionVerified
Based on the Smallsound/Bigsound Sparkle Motion· 3 other boards clone it
From the post
A request. Info from the manufacturer (one of the good guys who you should support if you have a chance):
the sparkle motion is our take on an iconic treble boost – the rangemaster.
the added controls and circuit modifications keep the original tones of the rangemaster and expand on them. transforming the sparkle motion from a basic treble booster to a mid range boost, dark bass boost, gritty mis-biased overdrive and more! the FIRST (probably) rangemaster-alike that is bass-friendly… wow!
this is NOT an “authentic” rangemaster clone; in fact, it is an ANTI-treble boost. it does not include any secret mojo or anything like that, save for the NPN germanium transistor (which means you can use this RM clone with your standard negative tip power supply).
controls include:
input attenuation, EQ, bias, volume
treble/bass toggle switch, bypass footswitch
note: the “original” bias point of around 7-7.2V has been changed to around 6.5V, because it sounds better there (at least to our ears).
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 16 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
- 100pF ceramic at the bottom centre: partly covered by the 4.7K and the 33uF can, the unit letter is cut off
- 33uF electrolytic right of the transistor: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×1 | 180K | 180k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 10Ω | 10 | read from the layout by eye | |
| Capacitors 5 | ||||
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×2 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 33uF | 33u | electrolytic; read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | NPN Ge | NPN GE | Transistor is NPN Ge, no part number given; read from the layout by eye | |
| Potentiometers 4 | ||||
| Input | A100K | A100k | Potentiometer | read from the layout by eye |
| Eq | B100K | B100k | Potentiometer | dual; read from the layout by eye |
| Bias | B50K | B50k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Treble | SPST | SPST | read from the layout by eye | |
Other boards based on the Smallsound/Bigsound Sparkle Motion
- Smallsound/Bigsound Sparkle Motion Dirtbox Layouts
- Smallsound/Bigsound Sparkle Motion Effects Layouts (blog)
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