• Country
• Germany

• Manufacturer / Brand
• Beyer; Berlin, später Beyerdynamic; Heilbronn

• Year
• 1954–1956

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 94355

• Wave bands
• - without

• Power type and voltage
• No Power needed

• from Radiomuseum.org
• Model: M31b - Beyer; Berlin, später

• Dimensions (WHD)
• 30 x 155 x 30 mm / 1.2 x 6.1 x 1.2 inch

• Notes
• Bändchen-Mikrofon; Achtercharakteristik; 40-10000 Hz.
  Im HdB d.Rdf-& Ferns-GrH 1954/55 ohne "b" geführt.

• Net weight (2.2 lb = 1 kg)
• 0.4 kg / 0 lb 14.1 oz (0.881 lb)

• Price in first year of sale
• 280.00 DM

• Source of data
• HdB d.Rdf-& Ferns-GrH 1955/56

• Author
• Model page created by Bernd P. Kieck. See "Data change" for further contributors.

• Other Models

• Here you find 149 models, 140 with images and 55 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Beyer; Berlin, später Beyerdynamic; Heilbronn