• Country
• Germany

• Manufacturer / Brand
• Neumann, Georg, Laboratorium für Elektroakustik GmbH; Berlin

• Year
• 1955 ?

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 150309

• Wave bands
• - without

• Details
• Power Supply (not only Batt.El.)

• Power type and voltage
• Storage and/or dry batteries / 4; 120 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Batteriespeisegerät BB9 - Neumann, Georg, Laboratorium f

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 220 x 100 x 120 mm / 8.7 x 3.9 x 4.7 inch

• Notes
• Batteriespeisegerät zu den Mikrophonen M49, M50, KM53/54, MM3. Mit angestecktem Ladegerät BL 1 für die 4 eingebauten DEAC-Zellen.

• Net weight (2.2 lb = 1 kg)
• 1.3 kg / 2 lb 13.8 oz (2.863 lb)

• Source of data
• -- Original-techn. papers.

• Author
• Model page created by Nikolaus Löwe. See "Data change" for further contributors.

• Other Models

• Here you find 128 models, 118 with images and 47 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Neumann, Georg, Laboratorium für Elektroakustik GmbH; Berlin