Microphone Amplifier 91B27 - 91B28 - 91B29

Disa Elektronik A/S; Copenhagen

  • Year
  • 1964 ??
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 283066

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

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110, 220 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Microphone Amplifier 91B27 - 91B28 - 91B29 - Disa Elektronik A/S;
  • Shape
  • Rack
  • Dimensions (WHD)
  • 45 x 113 x 270 mm / 1.8 x 4.4 x 10.6 inch
  • Notes
  • Trensistorized microphone amplifier from the DISA 19B series. (91B27 and 91B29 are line level amplifiers with higher input impedance). Transistorized, direct replacement for the TAB V-72 modules. Designed for installation in standard DIN rack in broadcast mixing desks. 

    This amp has built-in power supply (110/220V) and can be hot-swapped by the user in case of failure, even when the studio is on-air. 

    3 step gain control in front panel (6dB steps)

  • Literature/Schematics (1)
  • - - Manufacturers Literature (complete sercive manual for Disa 91 series mic/line amplifiers)
  • Author
  • Model page created by Matti Adolfsen. See "Data change" for further contributors.

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