Enclosure not stated · 1 knob
Vox Repeat PercussionVerified
Based on the Vox Repeat Percussion· 6 other boards clone it
From the post
.. awaits comments asking what the bloody hell is that! :o)
I think a few people will like this, a really great sounding tremolo. The 2N2646's are obsolete but still available from a number of places, RS, Farnell, Mouser and a few sellers on eBay. They're not as cheap as the more common silicon transistors but definitely worth getting in for this.
Original:
Modified to include a depth pot and altered values for more output.
Version with all of the above and a couple of extras including a Tone switch which switches the input cap to give you an option to prevent any low end loss, and a Fast/Slow rate switch.
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 20 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| ×2 | 1M | 1M | read from the layout by eye | |
| ×2 | 330K | 330k | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 3K3 | 3.3k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 82K | 82k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 33R | 33 | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 47n | 47n | read from the layout by eye | |
| ×1 | 4n7 | 4.7n | read from the layout by eye | |
| ×1 | 68n | 68n | read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N2646 | 2N2646 | unijunction; read from the layout by eye | |
| Q2 | MPSA18 | MPSA18 | read from the layout by eye | |
| Q3 | MPSA18 | MPSA18 | read from the layout by eye | |
| Potentiometers 1 | ||||
| Rate | B50K | B50k | Potentiometer | read from the layout by eye |
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