• Country
• Germany

• Manufacturer / Brand
• Siemens-Reiniger-Werke AG (SRW); Berlin

• Year
• 1957 ??

• Category
• Medical Technology

• Radiomuseum.org ID
• 151749

• Number of Transistors
• 3

• Semiconductors
• OC70 OC70 OC71

• Main principle
• Audio-Amplification; 3 AF stage(s)

• Wave bands
• - without

• Details
• Hearing aid

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - only for Earphone!

• Material
• Metal case

• from Radiomuseum.org
• Model: Phonophor Hörgerät zeta - Siemens-Reiniger-Werke AG SRW;

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

• Dimensions (WHD)
• 46 x 83 x 15 mm / 1.8 x 3.3 x 0.6 inch

• Notes
• Siemens & Reiniger Hörgerät.

• Net weight (2.2 lb = 1 kg)
• 0.1 kg / 0 lb 3.5 oz (0.22 lb)

• Author
• Model page created by Norbert Haselbach. See "Data change" for further contributors.

• Other Models

• Here you find 11 models, 10 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Siemens-Reiniger-Werke AG (SRW); Berlin