• Country
• Germany

• Manufacturer / Brand
• UNBEKANNTE FIRMA D / A / CH - Siehe Anleitung unter der «Firma»

• Year
• 1950 ??

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 80076

• • alternative name: Unknown, Custom Built

• Number of Tubes
• 2

• Valves / Tubes
• EF40 EF40

• Power type and voltage
• Alternating Current supply (AC) / 220 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Röhrenmikrofon - UNBEKANNTE FIRMA D / A / CH -

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 70 x 360 x 70 mm / 2.8 x 14.2 x 2.8 inch

• Net weight (2.2 lb = 1 kg)
• 1.5 kg / 3 lb 4.9 oz (3.304 lb)

• Author
• Model page created by Peter Böhm. See "Data change" for further contributors.

• Other Models

• Here you find 466 models, 405 with images and 40 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from UNBEKANNTE FIRMA D / A / CH - Siehe Anleitung unter der «Firma»