125B · 3 knobs
Chasm Echo Reverb
Based on the EarthQuaker Devices Ghost Echo· 4 other boards clone it
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From the vendor
Reverb pedal on Accutronics BTDR-2H module and IC PT2399. The pedal is capable of creating subtle echoes to create the effect of "otherworldly" presence, as well as boundless atmospheric passages. The reverb has a character somewhat reminiscent of a spring, but it’s hard to call it “spring emulation” - the sound is painfully original - melancholy, causing goosebumps. True bypass. Power supply: regulated mains adapter 9 VDC. The dimensions of the PCB 50 x 50 mm. Enclosure type: Hammond 125B.
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 27 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×1 | 470 | 470 | Metal film resistor 1/4W 470 Ohm | |
| ×1 | 1k | 1k | Metal film resistor 1/4W 1k | |
| ×8 | 10k | 10k | Metal film resistor 1/4W 10k | |
| ×1 | 12k | 12k | Metal film resistor 1/4W 12k | |
| ×3 | 15k | 15k | Metal film resistor 1/4W 15k | |
| ×3 | 22k | 22k | Metal film resistor 1/4W 22k | |
| ×1 | 33k | 33k | Metal film resistor 1/4W 33k | |
| ×1 | 100k | 100k | Metal film resistor 1/4W 100k | |
| ×2 | 1M | 1M | Metal film resistor 1/4W 1M | |
| Capacitors 9 | ||||
| ×1 | 1n | 1n | Film capacitor (R=5mm) 1n 63V | Film capacitor |
| ×1 | 2n2 | 2.2n | Film capacitor (R=5mm) 2n2 63V | Film capacitor |
| ×1 | 10n | 10n | Film capacitor (R=5mm) 10n 63V | Film capacitor |
| ×6 | 100n | 100n | Film capacitor (R=5mm) 100n 63V | Film capacitor |
| ×3 | 470n | 470n | Film capacitor (R=5mm) 470n 63V | Film capacitor |
| ×1 | 1u | 1u | Electrolytic capacitor 1µ 50V | Electrolytic capacitor |
| ×1 | 2u2 | 2.2u | Electrolytic capacitor 2µ2 25V | Electrolytic capacitor |
| ×3 | 10u | 10u | Electrolytic capacitor 10µ 16V | Electrolytic capacitor |
| ×3 | 100u | 100u | Electrolytic capacitor 100µ 16V | Electrolytic capacitor |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | Diode 1N4001 | |
| ICs 3 | ||||
| ×2 | TL072 | TL072 | IC TL072 DIP8 | |
| ×2 | 78L05 | 78L05 | IC 78L05 TO-92 | |
| ×1 | PT2399 | PT2399 | IC PT2399 DIP16 | |
| Potentiometers 3 | ||||
| ×1 | B2k | B2k | Potentiometer Alpha RV16AF-41-17K-B2k | |
| ×1 | B5k | B5k | Potentiometer Alpha RV16AF-41-17K-B5k | |
| ×1 | B10k | B10k | Potentiometer Alpha RV16AF-41-17K-B10k | |
| LEDs 1 | ||||
| ×1 | LED | LED | LED 5mm | 5mm |
| Other 1 | ||||
| ×1 | Belton/Accutronics BTDR-2H | BELTON/ACCUTRONICS BTDR-2H | IC Belton/Accutronics BTDR-2H | |
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