EIA codes to ID USA tubes

EIA codes you might find on a tube. Great resource to have when the log is gone and you have a generic logo. See the post for all the codes

  • 111 = Amperex
  • 125 = Bendix
  • 158 = DuMont
  • 162 = Eimac (Eitel-McCullough, Inc)
  • 169 = Electronic Tube Corp
  • 188 = GE / KEN-RAD 188-4, 188-5 (KEN-RAD factory), 188-20 (NY)
  • 210 = CBS Hytron
  • 231 = Machlett
  • 247 = National Union
  • 274 = RCA (Radio Corp of America)
  • 280 = Raytheon
  • 310 = Superior Tube Co
  • 312 = Sylvania (Hygrade Sylvania Corp)
  • 322 = Tung-Sol (USA)
  • 323 = United Electronics
  • 336 = Western Electric
  • 337 = Westinghouse
  • 343 = Zenith Radio Corp (CRT’s)
  • 423 = Nortn American Philips Corp
  • 713 = Taylor (aka Cetron-Taylor)
  • 722 = Sylvania-manufactured for OEM equipment makers (Allen Organ)
  • 738 = Lewis & Kaufman
  • 749 = National Electronics (also Cetron)
  • 771 = Penta Laboratories
  • 781 = Vacuum Tube Products
  • 809 = Varian Associates
  • 879 = Litton Industries
  • 935 = Electrons, Inc
  • 1022 = Fisher branded Mullard/Telefunken/Amperex
  • 1109 = Raytheon (Japan)
  • U.S.A.3 (found on the glass envelope) = Tung-Sol
  • 8I = Toshiba (Tokyo Shibaura Electric)

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