• Country
• Germany

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

• Year
• 1955

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 126116

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

• Number of Tubes
• 4

• Valves / Tubes
• EF804S EF804S EL42 EL42

• Number of Transistors

• Semiconductors
• Tr.Gl.=Metal-rectif.

• Main principle
• Audio-Amplification; 2 AF stage(s)

• Wave bands
• - without

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

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 4 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: 4 Watt Lautsprecherverstärker V73 - Maihak AG, H.; Hamburg -

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 94 x 134 x 280 mm / 3.7 x 5.3 x 11 inch

• Notes
• Entwicklung der Zentraltechnik des NWDR für die ARD. Betriebseinführung 1955, Fertigung bis in die 60er Jahre. Vollsymmetrischer Gegentakt-Verstärker. Anwendung als Kommando- und Abhör-Verstärker.

• Net weight (2.2 lb = 1 kg)
• 4.5 kg / 9 lb 14.6 oz (9.912 lb)

• Source of data
• -- Original-techn. papers.

• Mentioned in
• ARD-Braunbuch

• Author
• Model page created by Bernhard Nagel. 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