• Country
• Japan

• Manufacturer / Brand
• TONO Corporation

• Year
• 1984 ??

• Category
• Amateur Equipment (Other, but not Key)

• Radiomuseum.org ID
• 136773

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• RF Converter/Adapter (not voltage converter)

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit. / 12-13.8 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Theta 550 - TONO Corporation

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 250 x 55 x 225 mm / 9.8 x 2.2 x 8.9 inch

• Notes
• Decoder for Radioteletype (Baudot/ASCII) / CW, will display RTTY text on a television screen or will print directly to an ASCII printer.

• Net weight (2.2 lb = 1 kg)
• 1.5 kg / 3 lb 4.9 oz (3.304 lb)

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

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 10 models, 9 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from TONO Corporation