- Belling Lee (BLP), Newmarket, Suffolk, UK, +44 1638 665161
- Braden Shielding Systems, Tulsa, OK, USA, 918-624-2888
- Chomerics, div. of Parker Hannifin Corp., Woburn, MA, USA, 781-935-4850
- Comtest Engineering B.V., Zoeterwoude, The Netherlands, +31 71 5417531
- Dayton T. Brown Inc., Engineering, Test, & Manufaturing Div., Bohemia, NY, USA, 631-589-6300
- Elite Electronic Engineering Co., Downers Grove, IL, 630-495-9770
- EMC Technologies, Tullamarine (Melbourne), Victoria, Australia, +613 9335 3333
- EMCC Dr. Rasek, Ebermannstadt, Germany, +49 9194 9016
- Emcon Emanation Control Ltd., Ottawa, ON, Canada, 613-723-1838
- Equipto Electronics Corp., Aurora, IL, USA, 800-204-7225
- ETS-Lindgren UK, Stevenage, Herts, UK, +44 1438 730700
- The Howland Company, Inc., Buford, GA, USA, 678-546-5680
- National Technical Systems Inc., Calabasas, CA, USA, 800-270-2516
- Nemko, San Diego, CA, USA, 858-755-5525
- OSPL Nederland BV, Eindhoven, The Netherlands, +31 402462309
- Panashield Inc., Norwalk, CT, USA, 203-866-5888
- Radiation Sciences Inc., Harleysville, PA, USA, 215-256-4133
- Rainford EMC Systems, Wigan, UK, +44 1942 212077
- Scientific Hardware Systems, Gilroy, CA, USA, 408-848-8868
- Security Engineering Services Inc., Chesapeake Beach, MD, USA, 301-855-4565
- TRW/ESL, Sunnyvale, CA, USA, 408-752-2495
- TUV Product Service Ltd., BABT, Fareham, Hampshire, UK, +44 1489 558100
- Washington Laboratories Ltd., Gaithersburg, MD, USA, 301-417-0220
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