• Country
• Italy

• Manufacturer / Brand
• Unda Radio; Como, Dobbiaco

• Year
• 1937/1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 30785

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A7 78 75 42 80

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 90-260 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Mono Unda 538 - Unda Radio; Como, Dobbiaco

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Notes
• Sensibilità 15 uV.

• Source of data
• Guida Pratica Antique Radio (1) 1999

• Literature/Schematics (1)
• Il Radio Libro (E.D. Ravalico) Edizioni Hoepli (D.E. Ravalico: Servizio Radiotecnico vol. II. Radioriparazioni. 8^ Edizione. Hoepli, Milano, 1952.)

• 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