A-44

Sonora Phonograph Co., Inc.; New York, N.Y.

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  • Anno
  • 1928
  • Categoria
  • Radio (o sintonizzatore del dopoguerra WW2)
  • Radiomuseum.org ID
  • 58208

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 Specifiche tecniche

  • Numero di tubi
  • 10
  • Principio generale
  • A circuiti accordati (TRF o amplif. diretta in generale)
  • N. di circuiti accordati
  • 5 Circuiti Mod. Amp. (AM)
  • Gamme d'onda
  • Solo onde medie (OM).
  • Particolarità
  • Giradischi o cambiadischi
  • Tensioni di funzionamento
  • Alimentazione a corrente alternata (CA) / 110 Volt
  • Altoparlante
  • AP elettrodinamico (bobina mobile e bobina di eccitazione/di campo)
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: A-44 - Sonora Phonograph Co., Inc.;
  • Forma
  • Console, con gambe d'appoggio basse (< 50%).
  • Annotazioni

  • The model A44 from Sonora Phonograph Co. Inc is a combination set in English Renaissance look with grained butt walnut panels and oak bull overlays. The chassis and schematic are from model A-46. It has a push-pull output stage. The tube RA-1 was made by Arcturus for Sonora. Special indirectly heated tube from 1928 with one end of the 15 volt AC heater connected internally to the cathode. The result was an AC tube with a standard 4 pin base which could be used to "electify" battery receivers. Arcturus made also the other tubes in that model for Sonora.

    Sonora made two versions of the A44 models: one that employed the 15-volt Arcturus tubes, and one, which was a converted job, that employed '27 tubes in all RF stages. In the latter case, the volume knob was used to control cathode bias on the RF amplifiers. This method was unsuitable because of the value of the control used; volume control was not gradual.

  • Prezzo nel primo anno
  • 695.00 $
  • Fonte esterna dei dati
  • Ernst Erb
  • Letteratura / Schemi (1)
  • Radio Craft (March 1931, p. 555)

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