Project · Octave
Dan Armstrong™ Green Ringer™ Replica
This is the Dan Armstrong™ Green Ringer™ Replica project, an easy to build, great sounding pedal project. There are no controls on this thing which makes it somewhat unique, and easier/less expensive to build. This is our favorite "octave" stompbox.
Project files
Everything you need to build it
Green Ringer™ Replica Ready-For-Transfer Printed Circuit Board Layout - For use only if you are a complete DIY person who wants to etch and drill your own PCB. Otherwise, we recommend you ignore this PCB mask and buy the Ready-to-Solder Printed Circuit Board or Complete Kit.
Parts layout
Parts Layout / Wiring Diagram
What you will need
Bill of Materials
Version 2009June21 · Copyright 2006 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 | 560k | green-blue-yellow | green-blue-black-orange |
| R2 | 160k | brown-blue-yellow | brown-blue-black-orange |
| R3 | 18k | brown-gray-orange | brown-gray-black-red |
| R4 | 6k2 (6.2k) | blue-red-red | blue-red-black-brown |
| R5 | 10k | brown-black-orange | brown-black-black-red |
| R6 | 10k | brown-black-orange | brown-black-black-red |
| R7 | 68k | blue-gray-orange | blue-gray-black-red |
| R8 | 68k | blue-gray-orange | blue-gray-black-red |
| R9 | 22k | red-red-orange | red-red-black-red |
| R10 | 22k | red-red-orange | red-red-black-red |
| R11 | 10k | brown-black-orange | brown-black-black-red |
| R12 | 47k | yellow-violet-orange | yellow-violet-black-red |
| R13 | 1M5 (1.5M) | brown-green-green | brown-green-black-yellow |
| R14 | 1k | brown-black-red | brown-black-black-brown |
Capacitors
| Capacitor ID | Value | Type | Possible Marking |
|---|---|---|---|
| C1 | 0.047µF | Film | 473 |
| C2 | 0.047µF | Film | 473 |
| C3 | 0.047µF | Film | 473 |
| C4 | 100µF | Aluminum Electrolytic | 100µF |
| C5 | 0.1µF | Film | 104 |
Other
| Part ID | Part Name |
|---|---|
| Q1 | 2N5088 or 2N5089 Transistor |
| Q2 | 2N3906 or Other Low gain PNP Transistor |
| Q3 | 2N5088 or 2N5089 Transistor |
| D1 | 1N914 |
| D2 | 1N914 |
| D3 | Status Indicator LED and holder |
| J1 | Stereo quarter-inch jack |
| J2 | Mono quarter-inch jack |
| J3 | 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 |
How to build it
Instructions
Version 2007May30 · Copyright 2006 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
This is a replica of the Dan ArmstrongTM Green RingerTM Octave (pseudo Ring Modulator) referred to as GRO in these documents. This Octave effect does not have any control knobs or switches, it doesn't need any, it's got a very nice octave sound somewhat unique from the other octave effects we have played. Use the project documents provided, starting with the General Build Instructions. You should use a very low gain transistor for Q2, we believe the octave effect is more pronounced with a low gain transistor here. Q1 and Q3 type and selection is not critical to the sound. D1 and D2 can be just about any type of diode. Please Note: the PCB shows a 470k resistor value in the bottom right area of the PCB, this should be 47k. Here's an inside view of the unit we built to give you some general ideas if needed.
Comments and questions are welcome and can be sent to [email protected] Here is a chart of voltages taken at the transistor pins. This information can be used to help you find and fix problems if your GRO doesn't work when you test it.
Component
Location
9 volt power supply Q1
Q2
Voltage
8.8
Collector
5.5
Base
1.8
Emitter
1.1
Collector
2.6
Q3
Base
5.5
Emitter
6.2
Collector
8.8
Base
4.0
Emitter
3.4
More about this project
Notes, sounds and related links
Ready to build? We have the kit.
Buy a Green Ringer™ Replica Complete Kit. Includes all the parts and materials you need to build one, all for about the price you would pay for a PCB and parts.
Would you like a Ready to Solder Circuit Board for this project? Note: If you buy the kit, the Ready-to-Solder Printed Circuit Board (RTS PCB) is included in the kit. You do not need to purchase this Ready to Solder Circuit Printed Board if you buy the kit.