CBS / CBS Hytron- 6L6G, 7N7, 12B4A, 3UA6, 12A4, 12AT7, 56J, 6JS, 6CN7

Raytheon- 4B27, 6J5, 12AX4GTA

Westinghouse- 6SN7GTB, 6AX5JT, 6SQ7, 3AV6

RCA- 6H6

Emmerson- 12AT6

Sylvania- 5U4GB, 5AV8, 6CF6, 6CB6A, 6BL7GT, 6J6A, 1V2, 1V2, 6BS8, 6BS8, 6BK7A, 6BR8, 12BY2A, 6BF5, 40A1, 2CY5, 6AN4, 6Y6GA

General Electronics- 6BY5GA, 5Y3GT, 6AC7, 5AT8, 12BA6, 6AM8, 12W6GT, 6AS8, 3BZ6, 6CS6, 6AB4, 6C4, 5U8, 6W6GT, 6AUSGT, 6AG7, 6AQ7GT, 5AT8, 12AT7, 6BE6, 6C4, 3CS6, 7AU7, 5AN8, 6T8, 6BA8A, 6CE5, 25W4GT, 3AL5, 6K6GT, 12BQ6GA, 12AX4GTA, 1X2,  6BK7B, 6CM7, 6BC5, 12AT7, 6BL7GT