1590BBS · 3 knobs
Throat
Based on the Polytone Multivoicer· 1 other board clones it
From the vendor
An overdrive... with a switchable octave up and clean blend. Who woulda thunk! This is a clone board of the rare Polytone Multivoicer. "The what?". Yeah... new one for us too, but thanks to Mike for bringing this one out of the darkness.
We made a couple of mods to make it a bit more builder and user friendly. The original used the old RC4739 op amps, so we swapped those out for some more common types. We also simplified the switching as well.
Schematic
The schematic is in the vendor's build document, page 4. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 58 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 29 | ||||
| R1 | 1msch | 1M | ||
| R2 | 47ksch | 47k | ||
| R3 | 680ksch | 680k | ||
| R4 | 330ksch | 330k | ||
| R5 | 33ksch | 33k | ||
| R6 | 47ksch | 47k | ||
| R7 | 10ksch | 10k | ||
| R8 | 100ksch | 100k | ||
| R9 | 10ksch | 10k | ||
| R10 | 10ksch | 10k | ||
| R11 | 5k1sch | 5.1k | ||
| R12 | 47rsch | 47 | ||
| R13 | 47rsch | 47 | ||
| R14 | 47rsch | 47 | ||
| R15 | 47rsch | 47 | ||
| R16 | 47rsch | 47 | ||
| R17 | 47rsch | 47 | ||
| R18 | 100ksch | 100k | ||
| R19 | 1msch | 1M | ||
| R20 | 10ksch | 10k | ||
| R21 | 47ksch | 47k | ||
| R22 | 47ksch | 47k | ||
| R23 | 13ksch | 13k | ||
| R24 | 10ksch | 10k | ||
| R25 | 10ksch | 10k | ||
| R26 | 5k1sch | 5.1k | ||
| R27 | 5k1sch | 5.1k | ||
| R28 | 5k1sch | 5.1k | ||
| R29 | 5k1sch | 5.1k | ||
| Capacitors 20 | ||||
| C1 | 100nsch | 100n | ||
| C2 | 100nsch | 100n | ||
| C5 | 5nsch | 5n | ||
| C6 | 100psch | 100p | ||
| C7 | 33psch | 33p | ||
| C13 | 100nsch | 100n | ||
| C14 | 100nsch | 100n | ||
| C15 | 100nsch | 100n | ||
| C16 | 100nsch | 100n | ||
| C17 | 100nsch | 100n | ||
| C18 | 100nsch | 100n | ||
| C19 | 100nsch | 100n | ||
| C20 | 50nsch | 50n | ||
| C8 | 1uocr | 1u | ||
| C9 | 1uocr | 1u | ||
| C10 | 1uocr | 1u | ||
| C12 | 1uocr | 1u | ||
| C21 | 1uocr | 1u | ||
| C22 | 1uocr | 1u | ||
| C23 | 1uocr | 1u | ||
| Diodes 1 | ||||
| D5 | 1n4001sch | 1N4001 | ||
| ICs 3 | ||||
| IC1 | NE5532ocr | NE5532 | ||
| IC2 | NE5532ocr | NE5532 | ||
| IC3 | NE5532ocr | NE5532 | ||
| Potentiometers 2 | ||||
| Filter | A10Ksch | A10k | Potentiometer | |
| BLEN | B10Kocr | B10k | Potentiometer | |
| Trimmers 1 | ||||
| TRIM1 | 50ksch | 50k | ||
| Switches 2 | ||||
| Blend | DPDTocr | DPDT | ||
| Bypass | 3PDTocr | 3PDT | ||
Other boards based on the Polytone Multivoicer
- Polytone Multivoicer Dirtbox Layouts