Enclosure not stated · 5 knobs
Magnetic Echo
Based on the Keeley Magnetic Echo· 5 other boards clone it
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- Delay
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- Keeley
From the vendor
Keeley - Magnetic Echo
corrected version (non-working led lfo due to missing capacitor)
Schematic
The schematic image is on the project page. Open it at PCBWay.
Parts list 33 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×9 | 10k | 10k | read from the schematic by eye | |
| ×4 | 4k7 | 4.7k | includes LED resistor; read from the schematic by eye | |
| ×3 | 100k | 100k | read from the schematic by eye | |
| ×3 | 47k | 47k | read from the schematic by eye | |
| ×3 | 1k | 1k | read from the schematic by eye | |
| ×3 | 220k | 220k | read from the schematic by eye | |
| ×2 | 120k | 120k | read from the schematic by eye | |
| ×1 | 1M | 1M | read from the schematic by eye | |
| ×1 | 12k | 12k | read from the schematic by eye | |
| ×1 | 15k | 15k | read from the schematic by eye | |
| Capacitors 11 | ||||
| ×5 | 1u | 1u | read from the schematic by eye | |
| ×5 | 100n | 100n | read from the schematic by eye | |
| ×2 | 22n | 22n | read from the schematic by eye | |
| ×2 | 2n2 | 2.2n | read from the schematic by eye | |
| ×2 | 47u | 47u | electrolytic; read from the schematic by eye | |
| ×2 | 100u | 100u | electrolytic; read from the schematic by eye | |
| ×1 | 47n | 47n | read from the schematic by eye | |
| ×1 | 330n | 330n | read from the schematic by eye | |
| ×1 | 10n | 10n | read from the schematic by eye | |
| ×1 | 10u | 10u | electrolytic; read from the schematic by eye | |
| ×1 | 4u7 | 4.7u | electrolytic; read from the schematic by eye | |
| Diodes 2 | ||||
| ×2 | 1N4148 | 1N4148 | repeat-path clipping diodes; read from the schematic by eye | |
| ×1 | 1N5817 | 1N5817 | reverse polarity; read from the schematic by eye | |
| ICs 4 | ||||
| ×1 | OPA2134 | OPA2134 | two sections of one dual op-amp; read from the schematic by eye | |
| ×1 | PT2399 | PT2399 | echo processor; read from the schematic by eye | |
| ×1 | LM358N | LM358N | two sections: LFO and buffer; read from the schematic by eye | |
| ×1 | 78L05 | 78L05 | 5 V regulator for the PT2399; read from the schematic by eye | |
| Potentiometers 5 | ||||
| Level | B100k | B100k | Potentiometer | read from the schematic by eye |
| Regen | A100k | A100k | Potentiometer | read from the schematic by eye |
| Time | B50k | B50k | Potentiometer | read from the schematic by eye |
| Speed | B50k | B50k | Potentiometer | modulation rate; read from the schematic by eye |
| Depth | B100k | B100k | Potentiometer | modulation depth; read from the schematic by eye |
| Trimmers 1 | ||||
| ×1 | 100k | 100k | unlabelled trimmer in the input stage feedback; read from the schematic by eye | |
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