• Country
• Europe

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: Europe - see text

• Year
• 1963 ??

• Category
• Medical Technology

• Radiomuseum.org ID
• 325192

• Number of Transistors
• 5

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Hearing aid

• Power type and voltage
• Dry Batteries / AAA: 2 x 1.5 Volt

• Loudspeaker
• - only for Earphone!

• Material
• Metal case

• from Radiomuseum.org
• Model: Hearing aid M G S/77 - Unknown - CUSTOM BUILT: Europe

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

• Dimensions (WHD)
• 64 x 80 x 25 mm / 2.5 x 3.1 x 1 inch

• Notes

• Hearing aid. Internal magnetic microphone. Output for earphones.

• Net weight (2.2 lb = 1 kg)
• 0.088 kg / 0 lb 3.1 oz (0.194 lb)

• Author
• Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

• Other Models

• Here you find 14 models, 12 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: Europe - see text