• Country
• United States of America (USA)

• Manufacturer / Brand
• MILITARY U.S. (different makers for same model)

• Year
• 1915–1945

• Category
• Morse-Equipment & TTY, RTTY, TDD etc.

• Radiomuseum.org ID
• 74589

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: General Purpose Key J-45 - MILITARY U.S. different makers

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 73 x 25 x 135 mm / 2.9 x 1 x 5.3 inch

• Notes
• General purpose US-services morse-key J-37 with metal knee-clip for (battle-) field and airborne use. Different manufacturers.
  Later, Post WW2 models are stamped KY-116U.
  A Japanese JJ-45 with a JJ-37 key has been found recently. It was probably a copy.

• Net weight (2.2 lb = 1 kg)
• 0.3 kg / 0 lb 10.6 oz (0.661 lb)

• Mentioned in
• Perera'a "Telegraph Collectors Guide"

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 399 models, 351 with images and 210 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from MILITARY U.S. (different makers for same model)