Quadriunda 837 Radiofono

• Country
• Italy

• Manufacturer / Brand
• Unda Radio; Como, Dobbiaco

• Year
• 1937/1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 30783

• Picture
• Schematics

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

• Number of Tubes
• 8

• Valves / Tubes
• 6D6 6A7 6D6 75 56 42 or 45 42 or 45 80

• Main principle
• Superhet with RF-stage; ZF/IF 450 kHz

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and 2 x Short Wave.

• Details
• Record Player (not changer)

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

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

• Power out
• 10 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Quadriunda 837 [Radiofono] - Unda Radio; Como, Dobbiaco

• Shape
• Console: Chairside Radio.

• Dimensions (WHD)
• 550 x 952 x 387 mm / 21.7 x 37.5 x 15.2 inch

• Notes
• Indicatore optomeccanico di sintonia. Selettività: 1/1200. Sensibilità: 5 uV.
  Meter.

• Price in first year of sale
• 2,850.00 ITL

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

• Mentioned in
• Il Radio Libro (E.D. Ravalico) Edizioni Hoepli

• Literature/Schematics (1)
• -- Original-techn. papers. (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