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5U4

  • Vintage Vacuum Tube: Sylvania 5U4: Red Letter
    $7.50 Vintage Vacuum Tube: Sylvania 5U4: Red Letter
    This is a vintage Sylvania 5U4 Vacuum Tube with a top mounted halo getter with red lettering on the base. This tube tests "Good" on both plates using a Hickok 600A Tester. This tube is used and is priced accordingly. It is...
  • Vintage Vacuum Tube: Sylvania 5U4: Yellow Letter
    $7.50 Vintage Vacuum Tube: Sylvania 5U4: Yellow Letter
    This is a vintage Sylvania 5U4 Vacuum Tube with a top mounted halo getter with yellow lettering on the base. This tube tests "Good" on both plates using a Hickok 600A Tester. This tube is used and is priced accordingly. It...