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Electro Harmonix Small Stone
Based on the Electro-Harmonix Small Stone· 8 other boards clone it
- Category
- Phaser· Phasers
- Price
- see vendor
- Tags
- Phasers
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 23 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- 2N5087 ×3: the LFO has two PNP transistors with a single 2N5087 label pointing at both
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×1 | 100 | 100 | LFO output to the OTA control lines; read from the schematic by eye | |
| ×5 | 1k | 1k | one per phase stage to Vbias, one in LFO; read from the schematic by eye | |
| ×1 | 1.8k | 1.8k | LFO; read from the schematic by eye | |
| ×1 | 3.3k | 3.3k | mixer; read from the schematic by eye | |
| ×4 | 4.7k | 4.7k | two in input buffer, one mixer, one LFO; read from the schematic by eye | |
| ×1 | 7.5k | 7.5k | LFO divider; read from the schematic by eye | |
| ×6 | 10k | 10k | bias, input buffer collector, four phase-stage loads; read from the schematic by eye | |
| ×2 | 15k | 15k | bias supply, LFO; read from the schematic by eye | |
| ×1 | 22k | 22k | LFO; read from the schematic by eye | |
| ×11 | 27k | 27k | seven in the phase stages, two in the mixer, two in the LFO; read from the schematic by eye | |
| ×2 | 30k | 30k | first phase-stage input, input buffer to mixer; read from the schematic by eye | |
| ×1 | 100k | 100k | input; read from the schematic by eye | |
| ×1 | 270k | 270k | color switch feedback; read from the schematic by eye | |
| ×2 | 470k | 470k | bias of input transistor, effect output to ground; read from the schematic by eye | |
| Capacitors 4 | ||||
| ×5 | 0.0068uF | 6.8n | input coupling and one per phase stage, drawn 0.0068; read from the schematic by eye | |
| ×3 | 0.1uF | 100n | two in mixer/feedback, one in LFO, drawn 0.1; read from the schematic by eye | |
| ×1 | 10uF | 10u | electrolytic, input buffer output; read from the schematic by eye | |
| ×2 | 33uF | 33u | electrolytic; bias filter and LFO timing; read from the schematic by eye | |
| Transistors 2 | ||||
| ×1 | 2N5088 | 2N5088 | NPN, input buffer; read from the schematic by eye | |
| ×3 | 2N5087 | 2N5087 | PNP; one input buffer, two in the LFO (one label drawn for the LFO pair); read from the schematic by eye | |
| ICs 1 | ||||
| ×5 | EH1048 | EH1048 | OTA plus Darlington, house-marked; CA3094 substitute; four phase stages and the LFO; read from the schematic by eye | |
| Potentiometers 1 | ||||
| ×1 | 1M | 1M | Potentiometer | LFO rate, unnamed; read from the schematic by eye |
| Switches 1 | ||||
| Color | DPDT | DPDT | color switch, two poles linked; read from the schematic by eye | |
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