• Country
• United States of America (USA)

• Manufacturer / Brand
• Beltone Hearing Aid Company; Chicago (IL)

• Year
• 1948

• Category
• Medical Technology

• Radiomuseum.org ID
• 216438

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Hearing aid

• Power type and voltage
• Dry Batteries / 1,4 & 22.5 Volt

• Loudspeaker
• - only for Earphone!

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Symphonette Hörgerät Mono-Pac Model "S" - Beltone Hearing Aid Company;

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

• Dimensions (WHD)
• 2.25 x 3.625 x 0.875 inch / 57 x 92 x 22 mm

• Notes
• Beltone Hearing Aid Model Symphonette Mono-Pac Model "S".
  Required batteries:
  1.4 V Mercury RM-3 as "A" battery, 22.5 V No. 412E "B" battery.

• Net weight (2.2 lb = 1 kg)
• 0 lb 6 oz (0.375 lb) / 0.170 kg

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 4 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Beltone Hearing Aid Company; Chicago (IL)