CPI International

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CPI International, Inc.
Communications & Power Industries
Industry Diversified electronics
Predecessor Varian Associates
Founded 1995
Headquarters Palo Alto, California, United States
Key people
O. Joe Caldarelli, CEO
Products Vacuum tubes and microwave devices
Services Vacuum tube repair
Revenue $340 million (FY2006)
Number of employees
Website http://www.cpii.com/

CPI International, Inc. is the holding company for Communications & Power Industries, the largest[citation needed] manufacturer and rebuilder of electron devices (primarily vacuum tubes) in the United States. CPI was founded in 1995[2] when Varian Associates sold its electron-device business (the original business of its founders) to concentrate on medical systems. Its major subsidiaries include Eimac (which manufactures new vacuum tubes for the broadcasting, radar, medical systems, and other applications), Econco (a vacuum-tube rebuilder), Beverly Microwave Systems, and Radant Technologies. CPI International made its initial public offering in April, 2006.[3]

CPI's Econco division remanufactures Eimac and Machlett power tubes.

In February 2011, an affiliate of Veritas Capital, a private equity investment firm which invests in companies that provide critical products and services to governments worldwide, acquired CPI for approximately $525 million. CPI International ceased trading on The Nasdaq Stock Market.

In fiscal 2013, CPI employed approximately 1,670 people and generated approximately $420 million in sales.[citation needed]


  1. ^ "Company Profile for CPI International Inc (CPII)". Retrieved 2008-10-22. 
  2. ^ "SEC Info - Varian Medical Systems Inc - ‘8-K’ for 8/11/95". www.secinfo.com. Retrieved 2015-12-07. 
  3. ^ CPI International. "Company Information: History". Retrieved 2007-05-26. 

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