Project · Reverb
Stage Center Reverb
This is Craig Anderton's "Stage Center Reverb", which first appeared in the September 1976 Guitar Player Magazine. We have added some minor improvements provided by Mark Price. This project is a spring reverb effect, which means that in addition to the stompbox-sized box with the circuit and connections for guitar, amplifier and power, you will also need a spring reverb tank (as found in most amplifiers that have reverb) and a set if two shielded cables with "RCA" style jacks. We tested this circuit with several different spring reverb tanks and found that these are the identifiers of the reverb spring tanks that work well with this circuit:
Project files
Everything you need to build it
Spring Reverb Ready-For-Transfer Printed Circuit Board Layout
Schematic
Schematic
What you will need
Bill of Materials
Version 2014October28 · Copyright 2014 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
Resistors
| Resistor ID | Value | 3-band Marking | 4-band Marking |
|---|---|---|---|
| R1 | 4k7 (4.7k) | yellow-violet-red | yellow-violet-black-brown |
| R2 | 4k7 (4.7k) | yellow-violet-red | yellow-violet-black-brown |
| R3 | 10k | brown-black-orange | brown-black-black-red |
| R4 | 22k | red-red-orange | red-red-black-red |
| R5 | 33k | orange-orange-orange | orange-orange-black-red |
| R6 | 47k | yellow-violet-orange | yellow-violet-black-red |
| R7 | 500k Trimmer Potentiometer | ||
| R8 | 2M2 (2.2 M) | red-red-green | red-red-black-yellow |
| R9 | 2M2 (2.2 M) | red-red-green | red-red-black-yellow |
| R10 | 50k Linear Potentiometer | ||
| R11 | 50k Linear Potentiometer | ||
| R12 | 2M2 (2.2 M) | red-red-green | red-red-black-yellow |
| R13 | 10k | brown-black-orange | brown-black-black-red |
| R14 | 15k | brown-green-orange | brown-green-black-red |
| R15 | 1k | brown-black-red | brown-black-black-brown |
| R16 | 6k8 (6.8k) | blue-gray-red | blue-gray-black-brown |
| R17 | 1k | brown-black-red | brown-black-black-brown |
Capacitors
| Capacitor ID | Value | Type | Possible Marking |
|---|---|---|---|
| C1 | 25pF | ceramic | 25 |
| C2 | 0.01µF | Film | 103 |
| C3 | 0.47µF | Film | 474 |
| C4 | 0.1µF | Film | 104 |
| C5 | 25pF | ceramic | 25 |
| C6 | 0.47µF | Film | 474 |
| C7 | 1µF | Aluminum Electrolytic or Film | 1µF or 104 |
| C8 | None | ||
| C9 | None | ||
| C10 | 10µF | Aluminum Electrolytic | 10µF |
| C11 | 10µF | Aluminum Electrolytic | 10µF |
Potentiometers
| Part ID | Value | Type |
|---|---|---|
| R7 | 500k | Trimmer Potentiometer |
| R10 - Mix | 50k | Linear Taper Potentiometer |
| R11 - Dwell | 50k | Linear Taper Potentiometer |
Other
| Part ID | Part Name |
|---|---|
| IC1 | NE5532 |
| IC2 | NE5532 |
| IC3 | MAX1044 Charge Pump |
| D3 | Status Indicator LED and holder |
| J1 | Stereo quarter-inch jack |
| J2 | Mono quarter-inch jack |
| J3 | RCA Jack |
| J4 | RCA Jack |
| J5 | DC Jack |
| B1 | 9 volt battery (not included in the Kit) |
| Sw1 | Heavy Duty 3PDT foot switch 9v battery snap, Printed Circuit Board 24 gauge stranded wire, Enclosure, Knobs |
More about this project
Notes, sounds and related links
- 8DB2C1D
- 8EB2C1B
- 8EB3C1B
These are short tanks with input impedance of 310 ohm or 800 ohm (second digit of the tank code is D or E). The 8 ohm and 10 ohm input impedance tanks that are found in many amplifiers (second digit of tank code is A) do not work with this unit, they produce a lot of (bad) distortion and no reverb.