Enclosure not stated · 1 knob
SpaceHarp Phaser
Based on the Electro-Harmonix Small Stone· 8 other boards clone it
From the vendor
The SpaceHarp is a 4-stage phaser based on the early EHX Small Stone v1, utilizing 3 LM13700 OTA chips rather than out-of-production CA3094’s. Features include an internally-switchable jfet-buffered input, and trimmable lpb-1 boost on the output for crystal clean makeup volume.
Changes for V1.2: pcb error for C8 has been repaired, the color toggle now switches up & down rather than side to side.
Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 69 rows
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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 41 | ||||
| R6 | 27kocr | 27k | ||
| R9 | 100rocr | 100 | ||
| R10 | 15kocr | 15k | ||
| R11 | 1k8ocr | 1.8k | ||
| R12 | 27kocr | 27k | ||
| R13 | 27kocr | 27k | ||
| R14 | 10kocr | 10k | ||
| R15 | 1k8ocr | 1.8k | ||
| R16 | 27kocr | 27k | ||
| R18 | 10kocr | 10k | ||
| R19 | 1k8ocr | 1.8k | ||
| R20 | 27kocr | 27k | ||
| R21 | 27kocr | 27k | ||
| R22 | 10kocr | 10k | ||
| R23 | 1k8ocr | 1.8k | ||
| R24 | 27kocr | 27k | ||
| R25 | 27kocr | 27k | ||
| R26 | 10kocr | 10k | ||
| R27 | 10kocr | 10k | ||
| R28 | 180kocr | 180k | ||
| R29 | 100kocr | 100k | ||
| R30 | 100kocr | 100k | ||
| R31 | 270kocr | 270k | ||
| R32 | 10kocr | 10k | ||
| R33 | 10kocr | 10k | ||
| R34 | 10kocr | 10k | ||
| R35 | 1Mocr | 1M | ||
| R36 | 10kocr | 10k | ||
| R37 | 1Mocr | 1M | ||
| R40 | 470kocr | 470k | ||
| R41 | 47kocr | 47k | ||
| R42 | 390rocr | 390 | ||
| R43 | 10kocr | 10k | ||
| R1 | 100kocr | 100k | ||
| R2 | 1Mocr | 1M | ||
| R3 | 10kocr | 10k | ||
| R4 | 1kocr | 1k | ||
| R5 | 27kocr | 27k | ||
| R7 | 27kocr | 27k | ||
| R8 | 270kocr | 270k | ||
| R17 | 27kocr | 27k | ||
| Capacitors 18 | ||||
| C6 | 6n8ocr | 6.8n | ||
| C9 | 6n8ocr | 6.8n | ||
| C10 | 10uocr | 10u | ||
| C11 | 47nocr | 47n | ||
| C12 | 1uocr | 1u | ||
| C13 | 47uocr | 47u | ||
| C14 | 100nocr | 100n | ||
| C15 | 1uocr | 1u | ||
| C16 | 100nocr | 100n | ||
| C18 | 47uocr | 47u | ||
| C2 | 6n8ocr | 6.8n | ||
| C3 | 6n8ocr | 6.8n | ||
| C4 | 1uocr | 1u | ||
| C5 | 100nocr | 100n | ||
| C7 | 6n8ocr | 6.8n | ||
| C8 | 470uocr | 470u | ||
| C1 | 6n8ocr | 6.8n | ||
| C17 | 100nocr | 100n | ||
| Diodes 1 | ||||
| D1 | 1N4001ocr | 1N4001 | ||
| Transistors 4 | ||||
| Q1 | 2N5087ocr | 2N5087 | ||
| Q2 | 2N5088ocr | 2N5088 | ||
| Q3 | 2N5457ocr | 2N5457 | ||
| Q4 | 2N5088ocr | 2N5088 | ||
| ICs 3 | ||||
| IC1 | LM13700Nocr | LM13700N | ||
| IC2 | LM13700Nocr | LM13700N | ||
| IC3 | LM13700Nocr | LM13700N | ||
| Potentiometers 1 | ||||
| SPEED | 1MCocr | C1M | Potentiometer | |
| Switches 1 | ||||
| Color | DPDTocr | DPDT | ||
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