• Country
• Italy

• Manufacturer / Brand
• Unda Radio; Como, Dobbiaco

• Year
• 1938/1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 30787

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A7 78 75 6L6G 80

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

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

• Details
• Visual Tuning Indicator pre Eye

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 22 cm = 8.7 inch

• Power out
• 6.5 W (unknown quality)

• Material
• Wooden case

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

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

• Dimensions (WHD)
• 625 x 335 x 330 mm / 24.6 x 13.2 x 13 inch

• Notes

• Indicatore ottico di sintonia. Controllo di tono. Ingresso per giradischi.
  
  Tuning meter.

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

• Literature/Schematics (1)
• Il Radio Libro (E.D. Ravalico) Edizioni Hoepli

• Literature/Schematics (2)
• Schemario di apparecchi radio a valvole (II edizione, D.E. Ravalico - Hoepli - 1945)

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

• Other Models

• Here you find 242 models, 160 with images and 177 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unda Radio; Como, Dobbiaco