• Country
• Italy

• Manufacturer / Brand
• Unda Radio; Como, Dobbiaco

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 30778

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

• Number of Tubes
• 3

• Valves / Tubes
• 6B7 41 80

• Main principle
• TRF with diode detector; Reflex

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

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

• Power out
• 3 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Mono Unda 337 - Unda Radio; Como, Dobbiaco

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

• Notes

• Una gamma d'onde: medie (500-1500 KHz).

  Regolazione del volume con attenuazione del segnale all'antenna.
  Ingresso per giradischi.

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

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

• Literature/Schematics (1)
• Collezione di Schemi, Scuola Radio Elettra 1953 (pag. 17)

• 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