• Country
• Japan

• Manufacturer / Brand
• Kenwood, Trio-Kenwood Inc.; Komagane

• Year
• 1975 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 139587

• • alternative name: Trio Corp.
  • Brand: Jennen

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

• Number of Transistors
• 4

• Semiconductors

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Dry Batteries / 9 Volt

• Loudspeaker
• - only for Earphone!

• Material
• Metal case

• from Radiomuseum.org
• Model: Grid-Dip-Meter DM-81 - Kenwood, Trio-Kenwood Inc.;

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 70 x 45 x 180 mm / 2.8 x 1.8 x 7.1 inch

• Notes
• HF Generator mit einem 1KHz Modulator.
  Das Grid-Dip-Meter DM81 umfasst 7 Frequenz-Bereiche:
  0,7...1,6; 1,5...3,6; 3...7,4; 6,9...17,5; 17...42; 41...110; 83...250 MHz.
  Der Bereichs-Wechsel erfolgt mittels Steck-Spulen.

• Net weight (2.2 lb = 1 kg)
• 0.7 kg / 1 lb 8.7 oz (1.542 lb)

• Source of data
• - - Data from my own collection

• Author
• Model page created by Heinz Höger. See "Data change" for further contributors.

• Other Models

• Here you find 902 models, 836 with images and 251 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kenwood, Trio-Kenwood Inc.; Komagane