Logarithmic Amplifier 91H03

Disa Elektronik A/S; Copenhagen

  • Year
  • 1960 ??
  • Category
  • Miscellaneous (Other, Various) - see notes
  • Radiomuseum.org ID
  • 283142

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

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 220 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Logarithmic Amplifier 91H03 - Disa Elektronik A/S;
  • Shape
  • Rack
  • Dimensions (WHD)
  • 93 x 134 x 250 mm / 3.7 x 5.3 x 9.8 inch
  • Notes
  • Logarithmic amplifier for DISA light spot level meter. PPM level meter. 

    • input: +6dBu, 600 ohm
    • Output: 3 mA for moving coil instrument (mirror galvanometer)
    • 6,3V 15 watt for lamp of the light spot meter

    Internal calibration supply generated from 12 VAC secondary of the power transformer, stabilized with a light-bulb bridge. 

  • Literature/Schematics (1)
  • - - Manufacturers Literature (Complete service manual for DISA 19H series log amplifiers and 91D and 91G series light spot meters)
  • Author
  • Model page created by Matti Adolfsen. See "Data change" for further contributors.

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