• Country
• Germany

• Manufacturer / Brand
• Maihak AG, H.; Hamburg - Winterhude

• Year
• 1950

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 158607

• Number of Tubes
• 3

• Valves / Tubes
• EF12 EF12 EF12

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Tape Recorder

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

• Loudspeaker
• - For headphones or amp.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Reportofon MMK1 - Maihak AG, H.; Hamburg -

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

• Dimensions (WHD)
• 350 x 230 x 110 mm / 13.8 x 9.1 x 4.3 inch

• Notes
• Maihak Reportofon MMK1;
  Rundfunkbezeichnung: R25a. Entwicklung in Zusammenarbeit mit der Zentraltechnik des NWDR, Hamburg. Laufwerksantrieb mit Federwerkmotor, Laufdauer 4,5 min. pro Aufzug. Aufnahmezeit je nach Bandmaterial 10-15 Minuten. Bandgeschwindigkeit 19,05 cm/s, Frequenzumfang 50-6500 Hz +/- 2dB.
  Maihak Reportofon MMK1, a portable tape recorder for broadcast applications. Spring-loaded tape drive, tape speed: 19,05 cm/sec.

• Net weight (2.2 lb = 1 kg)
• 7.5 kg / 16 lb 8.3 oz (16.52 lb)

• Mentioned in
• Braunbuch-Beschreibung (ARD, IRT) (1950)

• Literature/Schematics (1)
• Heckenast-Zsadánszky: Mágneses hangrögzítés, Budapest 1954.

• Literature/Schematics (2)
• Die Allgemeine Rundfunk-Technik (8/1951, S.192)

• Author
• Model page created by Sándor Selyem-Tóth. See "Data change" for further contributors.

• Other Models

• Here you find 22 models, 20 with images and 10 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Maihak AG, H.; Hamburg - Winterhude