"Communications and Power Industries, Inc. (CPI). CPI is the former Varian Electron Device Group. CPI manufactures a number of tubes including Eimac power grid tubes, klystrons, magnetrons, traveling wave tubes, etc."
Richardson also list Eimac in their product line.
An online Electron Tubes Online Shopping Mall is available, and Halfin would like their site to become a real center of reference for tube lovers.
Hammond are a Canadian Company, in business since 1917. Hammond are well known for their high quality, conservatively rated, power and audio transformers including tube output transformers rated for up to 280 watts.
"Providing electron tubes, sockets and accessories from one of the world's largest inventories to the avionics, broadcast,communications, industrial, marine, medical, and microwave communications markets."
Svetlana is a very large (25,000 people) Russian company making electron tubes, semiconductors, and various other glass products, which has recently entered the American and world markets. Svetlana produce their own versions of popular power tubes such as the 4CX15000, 4CX250, 3CW30000, etc. They are now entering the audio market, with types such as EL34,6550C, 6L6GC, and a series of power triodes for high-end audio.
"Some of the Lowest Prices on NOS audio vacuum tubes you will see online!!"
"Tejas Tubes was founded by a musician for musicians and audiofiles. I got tired of hearing too much hype and paying too much for audio tubes for my Mesa Boogie and Fender amps!"
"In 1995, Triton acquired the former ITT Electron Technology Division in Easton, Pennsylvania. With 158,000 square feet of manufacturing capability on 52 acres, Triton Electron Technology Division (ETD) offers decades of design and manufacturing experience in the production of electron power devices. Our products include microwave and power grid tubes, klystrons,thyratrons and integrated subsystems for both military and commercial applications."
Over 700 vacuum tube types are available, plus "New Old Stock, Sockets,etc.