• Country
• Denmark

• Manufacturer / Brand
• 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.

• Number of Tubes
• 2

• Valves / Tubes
• EBF80 EBF80 90C1 150C2

• 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.

• Other Models

• Here you find 11 models, 9 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Disa Elektronik A/S; Copenhagen