• Anno
  • 1934
  • Categoria
  • Radio (o sintonizzatore del dopoguerra WW2)
  • Radiomuseum.org ID
  • 78219

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 Specifiche tecniche

  • Numero di tubi
  • 4
  • Principio generale
  • A reazione (con rigenerazione); 1 Stadi BF
  • N. di circuiti accordati
  • 2 Circuiti Mod. Amp. (AM)
  • Gamme d'onda
  • Onde medie (OM) e onde lunghe (OL).
  • Tensioni di funzionamento
  • Alimentazione universale (doppia: CC/CA) / 200-250 Volt
  • Altoparlante
  • AP elettrodinamico (bobina mobile e bobina di eccitazione/di campo)
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: CN213 - Vidor Ltd.; Erith Kent
  • Forma
  • Soprammobile basso, con andamento orizzontale (grosse dimensioni).
  • Dimensioni (LxAxP)
  • 15 x 12.5 x 8 inch / 381 x 318 x 203 mm
  • Annotazioni
  • C1 is Barretter rather than true tube.

    SG, Det, Audio TRF, but all Pentodes. Volume is via V1 cathode bias affecting control and screen Grids.

    UR2 / CY2 rectifiers wired in parallel to lower resistance (esp. on DC mains), it is in series with a 500mA MES lamp bulb as fuse. In all such series applications the current rating is more important than voltage.

    Early versions "shunt feed" the Speaker field winding. Later versions use the field coil as PSU choke instead of L11. Two versions of Electrodynamic speaker used, early (shunt) 7,500 Ohms Field coil and later (series) 820 Ohms field coil.

    External Aerial and Earth sockets (required).

    Warning
    Live Chassis and Aerial and Earth only capacitor isolated.  As the aerial series capacitor is a rear panel trimmer (175pf max) putting 2.2nF 1kV ceramic in series should be considered. The C1 20nF "Earth Isolation" capacitor can be a 630V or more Y rated 22nF part. Operation is unsafe otherwise.

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