Minifon (nicht Miniphon) M51 (Mi51)

• Country
• Germany

• Manufacturer / Brand
• Protona, R. Stach; Hamburg, Hannover (siehe auch Monske)

• Year
• 1951–1955

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 70701

• Picture
• Schematics

Previous Next

Previous Next

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

• Number of Tubes
• 3

• Valves / Tubes
• DF67 DF67 DL67

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Wire Recorder (or -Player)

• Power type and voltage
• Batteries / addl. power jack / 1,5 & 30 & 2 x 4,5 / 9 Volt

• Loudspeaker
• - only for Earphone!

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Minifon M51 - Protona, R. Stach; Hamburg,

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

• Dimensions (WHD)
• 170 x 110 x 35 mm / 6.7 x 4.3 x 1.4 inch

• Notes

• Schaltung aus Radio & Television News, May 1953, bezieht sich auf eine Besprechung des Modelles im Oktober 1952 (Audio Engineering Society).

• Net weight (2.2 lb = 1 kg)
• 0.8 kg / 1 lb 12.2 oz (1.762 lb)

• Price in first year of sale
• 730.00 DM

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• -- Schematic (Radio & Television News, May 1953)

• Literature/Schematics (1)
• R. Schellin, Minifon, ISBN 3-936012-00-8, Verlag Dr. Walz

• Literature/Schematics (2)
• A New Pocket Wire Recorder, Reed, AES, 1952

• Author
• Model page created by Reimund REINHARDT. See "Data change" for further contributors.

• Other Models

• Here you find 34 models, 29 with images and 12 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Protona, R. Stach; Hamburg, Hannover (siehe auch Monske)