• Anno
  • 1927 ?
  • Categoria
  • Altoparlante, cuffia o auricolare
  • Radiomuseum.org ID
  • 187287

 Specifiche tecniche

  • Gamme d'onda
  • - senza
  • Tensioni di funzionamento
  • Alimentazione a corrente alternata (CA)
  • Altoparlante
  • AP elettrodinamico (bobina mobile e bobina di eccitazione/di campo)
  • Materiali
  • Mobile di metallo
  • Radiomuseum.org
  • Modello: Rice-Kellogg Loudspeaker RK - BTH B.T.H., British Thomson-
  • Forma
  • Chassis o in scatola da montaggio
  • Dimensioni (LxAxP)
  • 310 x 310 x 240 mm / 12.2 x 12.2 x 9.4 inch
  • Annotazioni
  • Since 1926 BTH manufacures the moving coil loudspeaker. For use with either AC or DC, the unit incorporates the output amplifier as well as the mains equipment giving the necessary high anode voltage, exceeding 400, while the grid bias is also obtained from the mains. The electro-magnet is of large diameter, the pole being about 1 5/8 inch across. A supple centring device holds the coil in position, and the diaphragm is about 6 inch in diameter. Plunger operated contacts break all current supply circuits by the act of removing the unit from its containing cabinet.
    Excitation field with Selenium rectifier. R-K = Rice-Kellogg.
    A video about the first Rice-Kellogg Prototype at YouTube.
  • Peso netto
  • 13.6 kg / 29 lb 15.3 oz (29.956 lb)
  • Autore
  • Modello inviato da Sándor Selyem-Tóth. Utilizzare "Proponi modifica" per inviare ulteriori dati.

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