• Country
• Italy

• Manufacturer / Brand
• Unda Radio; Como, Dobbiaco

• Year
• 1938/1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 30786

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A8 6K7 6Q7 6L6 80

• Main principle
• Superheterodyne (common); ZF/IF 450 kHz

• Wave bands
• Broadcast plus 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Power out
• 5.5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Tri Unda 539 - Unda Radio; Como, Dobbiaco

• Shape
• Tablemodel, low profile (big size).

• Notes

• Controllo di tono. Ingresso Pick-Up.

• Source of data
• Guida Pratica Antique Radio III (2000)

• Literature/Schematics (1)
• Schemario di apparecchi radio a valvole (II edizione, D.E. Ravalico - Hoepli - 1945)

• Literature/Schematics (4)
• Il Radio Libro (E.D. Ravalico) Edizioni Hoepli

• Author
• Model page created by Alessandro De Poi. See "Data change" for further contributors.

• Other Models

• Here you find 243 models, 162 with images and 179 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unda Radio; Como, Dobbiaco