• Country
• Germany

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

• Year
• 1951–1955

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 71652

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 1

• Valves / Tubes
• AC701 or AC701k

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit. / 4; 120 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Kondensator-Mikrofon M49 [Röhre AC701] - Neumann, Georg, Laboratorium f

• Dimensions (WHD)
• 80 x 163 x 80 mm / 3.1 x 6.4 x 3.1 inch

• Notes
• Kondensatormikrofon mit umschaltbarer Richtcharakteristik Kugel, Niere, Acht. Übertragungsbereich 40 bis 16.000 Hz. Stromversorgung aus Netzgerät NN48/N52 oder Batteriekoffer B9. Heizspannung am Mikrofonsockel 4,0V bei Variante mit AC701.

• Net weight (2.2 lb = 1 kg)
• 0.750 kg / 1 lb 10.4 oz (1.652 lb)

• Price in first year of sale
• 560.00 DM

• Source of data
• -- Original prospect or advert / Radiokatalog Band 2, Ernst Erb

• Author
• Model page created by Werner Raacke. See "Data change" for further contributors.

• Other Models

• Here you find 128 models, 117 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