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PROJECT NAME
PLASMA
BASED ON
Colorsound Overdriver
EFFECT TYPE
Boost / drive
PROJECT SUMMARY
A reproduction of a boost pedal from the early 1970s that featured a two-band tone stack.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
PLASMA VINTAGE DRIVE
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.1 (2020-07-20)
1

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Summary of Contents for aion PLASMA VINTAGE DRIVE

  • Page 1 Boost / drive 1.0.1 (2020-07-20) PROJECT SUMMARY A reproduction of a boost pedal from the early 1970s that featured a two-band tone stack. Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). PLASMA VINTAGE DRIVE...
  • Page 2: Table Of Contents

    10 Document Revisions INTRODUCTION The Plasma Vintage Drive is a clone of the Colorsound Overdriver, a transistor-based boost/drive pedal with 2-band tonestack that was first sold in 1972. The Overdriver was an updated version of the Power Booster from 1970. The Power Booster ran at 18V using two batteries in series.
  • Page 3: Parts List

    Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm 100n Film capacitor, 7.2 x 2.5mm 10uF Electrolytic capacitor, 5mm 100pF MLCC capacitor, NP0/C0G 22uF Electrolytic capacitor, 5mm 220n Film capacitor, 7.2 x 2.5mm PLASMA VINTAGE DRIVE...
  • Page 4 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. PLASMA VINTAGE DRIVE...
  • Page 5: Build Notes

    European convention which is reversed. If using any of the BC-series transistors, you’ll likely need to rotate them 180 degrees, but check the datasheet or measure them with a transistor tester to be sure. PLASMA VINTAGE DRIVE...
  • Page 6: Schematic

    SCHEMATIC 100R 5817 100uF 100n BASS 100kB 220pF 2N5088 100pF 2N5088 2N5088 150k 22uF 22uF TREBLE 100kB GND GND GND GND 22uF PLASMA VINTAGE DRIVE...
  • Page 7: Drill Template

    BASS TREBLE x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” VOLUME DRIVE x: -0.65, y: +0.41 x: 0.65, y: +0.41 ø9/32” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” PLASMA VINTAGE DRIVE...
  • Page 8: Enclosure Layout

    ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B PLASMA VINTAGE DRIVE...
  • Page 9: 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. PLASMA VINTAGE DRIVE...
  • Page 10: 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 1.0.1 (2020-07-20) Updated link to parts list spreadsheet. 1.0.0 (2020-07-03) Initial release. PLASMA VINTAGE DRIVE...

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