• Country
• United States of America (USA)

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

• Year
• 1940 ??

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 176855

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Quartz FT-171-B - MILITARY U.S. different makers

• Dimensions (WHD)
• 38 x 75 x 19 mm / 1.5 x 3 x 0.7 inch

• Notes
• Quartz crystal holder for HF range crystals. Used in US military radio sets. Known usage in BC-325, BC-610 transmitters and SC-669 receiver.

• Source of data
• - - Data from my own collection

• Author
• Model page created by Götz Linss † 27.06.21. 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)