• Country
• United States of America (USA)

• Manufacturer / Brand
• Sterling Manuf. Co.; Cleveland, Ohio

• Year
• 1927 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 220881

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Home Tube Tester R-411 - Sterling Manuf. Co.; Cleveland

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes
• Tube Tester, for 4-pin UX style tubes, with adapter cable to plug into the radio to enable test.

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 60 models, 37 with images and 31 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sterling Manuf. Co.; Cleveland, Ohio