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PROJECT NAME
OBERON
BASED ON
Jordan Bosstone
EFFECT TYPE
Boost / distortion
PROJECT SUMMARY
Originally a module that plugged directly into the guitar, this early distortion unit was one of the first
effects to use diode clipping.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
OBERON VINTAGE DISTORTION
BUILD DIFFICULTY
Beginner
DOCUMENT VERSION
1.0.0 (2024-07-04)
1
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Table of Contents
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Summary of Contents for aion OBERON
- Page 1 Originally a module that plugged directly into the guitar, this early distortion unit was one of the first effects to use diode clipping. Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). OBERON VINTAGE DISTORTION...
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Page 2: Table Of Contents
California-Nashville transition between V3 and V4 was the most drastic change. The Oberon is directly based on the original California versions of the Boss Tone, with the NPN-NPN version of the circuit. We have added a toggle switch that selects between two sets of clipping diodes or disables them altogether, but otherwise, it’s a faithful reproduction of the original circuit. -
Page 3: Parts List
DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. BATT Battery snap 9V battery snap Optional. Use the soft plastic type—the hard-shell type will not fit. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. OBERON VINTAGE DISTORTION... -
Page 4: Build Notes
2N3904, but right in the sweet spot for the 2N3903. It may not matter at all since the majority of the clipping comes from the diodes and the transistors are limited to a fixed gain, so don’t focus too much on it. OBERON VINTAGE DISTORTION... -
Page 5: Schematic
SCHEMATIC 100R 1N5817 100uF 100n 6.8M 560k 2N3903 2N3903 OBERON VINTAGE DISTORTION... -
Page 6: Drill Template
INCH 0.625” 0.625” ø3/8” ø3/8” ø1/2” VOLUME ATTACK x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” CLIP x: 0, y: +0.66 ø1/4” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” OBERON VINTAGE DISTORTION... -
Page 7: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B OBERON VINTAGE DISTORTION... -
Page 8: Wiring Diagram
GND +V +V JACK GND JACK GND GND PCB 125B Shown with optional 9V battery. If battery is omitted, both jacks can be mono rather than one being stereo. Leave the far-right lug of the DC jack unconnected. OBERON VINTAGE DISTORTION... -
Page 9: Document Revisions
(In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.0 (2024-07-04) Initial release. OBERON VINTAGE DISTORTION...
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