John French at JRF Magnetic Sciences — Tape heads, rebuilding, special projects, New Jersey

Joe Dundovic’s Magnetic Head Company — A wide selection of tape heads, Minnesota

Jay McKnight’s Magnetic Reference Lab — Audio test tapes, information resource (on original Watergate tape panel), California

John Austin at Sprague Magnetics — Tape heads, tape recorder parts, California

Roger Ginsley (email) for factory authorized Studer service and support, Toronto, Canada

Ontario Audio-Video Service — Digital and analog (cassette) recorder repair in the Greater Toronto Area. PH–905-791-2020 FX–905-791-2121 TOLL FREE–888-791-2899 Speak with Rick

A. F. (Fred) Thal at ATAE (email) North American Studer specialist reconditioning and re-manufacturing type A80, A820 and A827 master recorders for professional applications.

Mike Spitz at ATR Services in York, PA supplies remanufactured Ampex ATR-100 machines and repairs other brands.

Precision European Hand Tools for Studer (and other) maintenance.