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PROJECT NAME
ORPHEUS GE
BASED ON
Mosrite
Fuzzrite (germanium)
®
EFFECT TYPE
Germanium fuzz
PROJECT SUMMARY
The definitive American response to the fuzz effects coming out of the UK in the mid-1960s, featuring
two germanium transistors in a unique blending arrangement.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
This documentation is for the germanium version of the project. There is also a
based on the later Fuzzrite circuit. While the names are similar, the schematic and part numbering
are different. Confirm your PCB looks like the one above and is labeled "Orpheus Germanium" or
just "Orpheus" before proceeding.
ORPHEUS GERMANIUM FUZZ
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.0 (2024-07-04)
IMPORTANT NOTE
silicon
version,
1
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Table of Contents
Related Manuals for aion ORPHEUS GE
Summary of Contents for aion ORPHEUS GE
- Page 1 PROJECT NAME ORPHEUS GE BASED ON BUILD DIFFICULTY Mosrite Fuzzrite (germanium) ® Easy EFFECT TYPE DOCUMENT VERSION Germanium fuzz 1.0.0 (2024-07-04) PROJECT SUMMARY The definitive American response to the fuzz effects coming out of the UK in the mid-1960s, featuring two germanium transistors in a unique blending arrangement.
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Page 2: Table Of Contents
Mosrite ® is a registered trademark of Mosrite USA, LLC. Aion FX has no affiliation with Mosrite USA or Catalinbread. USAGE The Orpheus Germanium has two knobs and one toggle switch: • Depth blends between the output of the first transistor and the second transistor. Since the second transistor is where most of the distortion takes place, it acts as a drive control. -
Page 3: Parts List
PARTS LIST This parts list is also available in a spreadsheet format which can be imported directly into Mouser for easy parts ordering. Mouser doesn’t carry all the parts—notably potentiometers—so the second tab lists all the non-Mouser parts as well as sources for each. →... - Page 4 PARTS LIST, CONT. PART VALUE TYPE NOTES DEPTH 500kC 16mm right-angle PCB mount pot See build notes for other potentiometer values. VOLUME 50kA 16mm right-angle PCB mount pot See build notes for other potentiometer values. MODE DPDT on-on Toggle switch, DPDT on-on 1/4"...
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Page 5: Build Notes
BUILD NOTES Potentiometer values The original Fuzzrite used a 350k potentiometer for Depth and 33k for Volume. These are non-standard values, so R7 and R8 have been added in parallel with these pots to allow standard types to be used. •... - Page 6 BUILD NOTES (CONT.) Variants The germanium Fuzzrite did not have the widespread clones and variants of the silicon version, but it did have one in particular, the Orpheum Fuzz (which also had a better-known silicon version). Orpheum Fuzz To build an Orpheum Fuzz, make the following substitutions: •...
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Page 7: Schematic
SCHEMATIC 1N5817 100uF 100n 10uF LT1054CP 100n 47uF MODE A Ge PNP Ge PNP MODE B ORPHEUS GERMANIUM FUZZ... -
Page 8: Drill Template
DRILL TEMPLATE Cut out this drill template, fold the edges and tape it to the enclosure. Before drilling, it’s recommended to first use a center punch for each of the holes to help guide the drill bit. Ensure that this template is printed at 100% or “Actual Size”. You can double-check this by measuring the scale on the printed page. -
Page 9: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B ORPHEUS GERMANIUM FUZZ... -
Page 10: Wiring Diagram
WIRING DIAGRAM N.C. N.C. OUT 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. ORPHEUS GERMANIUM FUZZ... -
Page 11: Document Revisions
LICENSE & USAGE Mosrite ® is a registered trademark of Mosrite USA, LLC. No direct support is offered for these projects beyond the provided documentation. It’s assumed that you have at least some experience building pedals before starting one of these. Replacements and refunds cannotbe offered unless it can be shown that the circuit or documentation are in error.
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