- CPI, Eimac Division
 - Design, development and manufacture of power grid tubes. - Danz Pacific Co. USA
- Network of trade companies with manufacturing industry contacts. Offers supplies including tungsten electrodes and vacuum tubes.
- Freeland Products, Inc.
- Quality rebuilt transmitter tubes and UHF-TV klystrons.
- High Vacuum Apparatus Manufacturing, Inc.
- Stainless steel vacuum valves, fittings and chambers for high-tech related industries.
- Penta Laboratories
- Manufactures and distributes electron tubes for use in broadcast, industrial, military, and medical equipment.
- SAS Audio Labs
- Hand crafted, direct marketed audiophile tube amplifiers and preamps.
- Screenvision, Ltd.
- Manufacturer of cathode ray tubes.
- Thales Electron Devices
- Manufactures electron tubes for professionnal applications including space, telecom, military, and x-ray imaging.
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