• Country
• United States of America (USA)

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

• Year
• 1951–1982 ??

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 73065

Click on the schematic thumbnail to request the schematic as a free document.

• Power type and voltage
• No Power needed

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch

• Power out
• 2.5 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Loudspeaker LS-166/U - MILITARY U.S. different makers

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 125 x 125 x 75 mm / 4.9 x 4.9 x 3 inch

• Notes
• Used for many NATO and german forces (Bundeswehr) millitary radio applications. Built-in input-transformer 600 Ohm : 8 Ohm, switch for low/high level volume. Case with bracket mounting. Many different manufacturers in US and Germany. Matches GRC-6, SEM 25/35 or RT 66/67/68 and many others. Cord is terminated with U-77/U plug. Good for use with SP-600 and R-390(A)/URR.

• Net weight (2.2 lb = 1 kg)
• 1.8 kg / 3 lb 15.4 oz (3.965 lb)

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Literature/Schematics (1)
• TM11-291 dated 1951

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

• Other Models

• Here you find 394 models, 346 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)