Documentation
The Aries service library, preserved.
Factory manuals, module schematics, and the 1975–1978 catalogs, scanned and organized by purpose. If you are repairing an Aries, start here.
Aries System 300
Old circuits, kept running.
Triangulum Research began with an Aries System 300 rescued from a dumpster. It has grown into a working archive of that instrument: restoration notes from the bench, the factory manuals and schematics as scanned PDFs, and new modules designed in the same spirit.
35+
manuals and schematics preserved
8
restoration and build logs
1
rescued Aries that started it all
What lives here
Documentation, bench notes, and new hardware.
Journal
Restoration and build notes from the bench.
What actually happened during the System 300 restoration: component sourcing, filter repairs, faceplate production problems, and demo recordings along the way.
Instruments
New modules in the Aries tradition.
The AT-327 multimode filter revives the rare AR-327 design as a new instrument, prototyped, demoed, and documented here as it develops.
Entry points
Start where the material is strongest.
About Triangulum
How a synthesizer pulled from a dumpster became a decades-long repair practice, and why the project is named for the constellation next to Aries.
history
repair practice
Resource archive
Owner's manuals, module schematics, factory catalogs, and the best external Aries references, grouped so you can find the document you need.
PDF library
catalogs
references
Restoration journal
The build log in order: restoration milestones, filter prototypes, board revisions, and module demos.
bench notes
demos
Selected journal
See the full journal
Three entries to start with.
Aries System 300 Restoration
The full restoration: new Switchcraft jacks, NOS switches and potentiometers, a rebuilt wiring harness, and a repaired multimode filter.
A Video Demo of the AT-327
The AT-327 multimode filter prototype on video: what the revived AR-327 design sounds like in practice.
Some pictures of an Aries in the wild
A restored System 300 in a working studio: the cabinet, the patch, and the scale of the instrument in a real room.
Have an Aries on your bench?
Corrections to the documentation, scans of material missing from the archive, and repair questions are all welcome.