Download
Share
Print this page
  1. Manuals
  2. Brands
  3. aion Manuals
  4. Accessories For Music Instruments
  5. SAPPHIRE
  6. Manual

aion SAPPHIRE Manual

Amp-like overdrive
Hide thumbs Also See for SAPPHIRE:

Advertisement

Quick Links

Download this manual
PROJECT NAME
SAPPHIRE
BASED ON
®
BOSS
BD-2 Blues Driver
EFFECT TYPE
Amp-like overdrive
PROJECT SUMMARY
One of the most popular pedals in the BOSS lineup, it uses their distinctive "discrete op-amp" topology
to deliver an amp-like drive resembling vintage Fender tweed or blackface amps.
Actual size is 2.3" x 2.42" (main board) and 1.78" x 0.86" (bypass board).
SAPPHIRE AMP OVERDRIVE
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2021-11-26)
1

Advertisement

loading
Need help?

Need help?

Do you have a question about the SAPPHIRE and is the answer not in the manual?

Questions and answers

Related Manuals for aion SAPPHIRE

Summary of Contents for aion SAPPHIRE

  • Page 1 One of the most popular pedals in the BOSS lineup, it uses their distinctive “discrete op-amp” topology to deliver an amp-like drive resembling vintage Fender tweed or blackface amps. Actual size is 2.3” x 2.42” (main board) and 1.78” x 0.86” (bypass board). SAPPHIRE AMP OVERDRIVE...

  • Page 2: Table Of Contents

    The Sapphire is based on the stock BD-2 circuit converted to true bypass. The bass boost has been made variable, so it can be adjusted between the stock value and the Galaxie value.

  • Page 3: Parts List

    Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W 470k Metal film resistor, 1/4W 100k Metal film resistor, 1/4W Metal film resistor, 1/4W 100k Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W SAPPHIRE AMP OVERDRIVE...
  • Page 4 Galaxie mod: omit (leave empty). See build notes for full mod. 1N914 512-1N914 Galaxie mod: omit (leave empty). See build notes for full mod. 1N914 512-1N914 Galaxie mod: omit (leave empty). See build notes for full mod. SAPPHIRE AMP OVERDRIVE...
  • Page 5 Switchcraft 111X or equivalent. 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent. 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. SAPPHIRE AMP OVERDRIVE...

  • Page 6: Build Notes

    All surface-mount JFETs use the same pinout, so this configuration will fit any type that we’re aware of. However, always check the datasheet if you’re uncertain—they’re difficult to desolder. Using through-hole adapters If you’re not confident in your ability to work with surface-mount parts, Aion FX offers 2SK209-GR JFETs (the SMD version of 2SK184-GR and 2SK117-GR) that come pre-soldered to adapters for use in through-hole designs.
  • Page 7 82n or 68n may be better alternates if you have them. R24: In the Galaxie Mod, this resistor is changed to 33k. However, the Sapphire’s bass control is a variable resistor in series with R24, and at max rotation it’s nearly 33k in value (6.8k + 25k = 31.8k). It’s recommended to leave R24 as the stock 6.8k, but you could increase it to 8.2k if you want full clockwise...
  • Page 8 Electronics, who carries a straight-pin knurled-shaft type. These can be made to fit the Sapphire PCB with some effort, but it’s much easier to just use a 500kA dual potentiometer which is readily available in the right-angle format used in this project.

  • Page 9: Schematic

    47uF 100uF 100uF 47uF 100n 47uF 330k 2N3906 2SK209-GR Q2 Q3 47pF 47pF 2SK209-GR 100n 100k GAINB 250kA 150n OMIT (510k) 2N3906 Q5 Q6 100pF 100pF 2SK209-GR GAINA 250kA IC1B JRC4558D 2N5088 OMIT (510k) BASS 25kB 2N5088 SAPPHIRE AMP OVERDRIVE...

  • Page 10: Drill Template

    VOLUME GAIN x: -0.65, y: +1.71 x: +0.65, y: +1.71 ø9/32” ø9/32” BASS TREBLE x: -0.65, y: +0.41 x: +0.65, y: +0.41 ø9/32” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.775 x: 0, y: -1.775 ø5/16” ø15/32” SAPPHIRE AMP OVERDRIVE...

  • Page 11: Enclosure Layout

    ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B SAPPHIRE AMP OVERDRIVE...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM NC OUT GND +V +V JACK GND JACK GND GND PCB 125B SAPPHIRE AMP OVERDRIVE...

  • Page 13: 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 (2021-11-26) Initial release. SAPPHIRE AMP OVERDRIVE...