• Country
• Brazil

• Manufacturer / Brand
• Douglas Radioelétrica S.A.; São Paulo

• Year
• 1950 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 276833

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

• Number of Tubes
• 5

• Valves / Tubes
• 12SA7 12SK7 12SQ7 50L6 35Z5

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• AC/DC-set / 220 Volt

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

• from Radiomuseum.org
• Model: 33S circuit 3 - Douglas Radioelétrica S.A.;

• Notes

• The model 33S from Douglas Radiioelétrica has 5 distinct versions

  MODEL	CHARACTERISTIC
  33S circuit 1	6SA7 converter, series connected filaments, ac dc, 220V
  33S circuit 2	12SA7 converter, series connected filaments, ac dc, 220V
  33S circuit 3	12SA7 converter, series connected filaments, ac dc, 220V
  33S circuit 4	6SA7 converter, parallel connected filaments, ac, 115V
  33S circuit 5	12SA7 converter, series connected filaments, ac dc, 105V

  2 sections variable capacitor (2x 410 pF), Tone control.
  Supplied in kit format.
  Rádio receptor de duas faixas fornecido em kit

• Literature/Schematics (1)
• - - Manufacturers Literature

• Author
• Model page created by Antonio Rabitti. See "Data change" for further contributors.

• Other Models

• Here you find 69 models, 17 with images and 69 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Douglas Radioelétrica S.A.; São Paulo