• Country
• United States of America (USA)

• Manufacturer / Brand
• Sylvania (Hygrade, GTE, Nilco); Emporium (PA)

• Year
• 1951 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 214309

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Cathode Ray Tube Testing Adapter 228 - Sylvania Hygrade, GTE, Nilco;

• Shape
• Miscellaneous shapes - described under notes.

• Notes
• CRT test adapter for Sylvania Tube Testers 139/140 and 219/220.

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

• Other Models

• Here you find 1094 models, 456 with images and 967 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sylvania (Hygrade, GTE, Nilco); Emporium (PA)