CN213

Vidor Ltd.; Erith (Kent)

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1934
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 78219

Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.

 Especificaciones técnicas

  • Numero de valvulas
  • 4
  • Principio principal
  • RFS con reacción (regenerativo); 1 Etapas de AF
  • Número de circuitos sintonía
  • 2 Circuíto(s) AM
  • Gama de ondas
  • OM y OL
  • Tensión de funcionamiento
  • Red: Aparato AC/DC. / 200-250 Volt
  • Altavoz
  • Altavoz electrodinámico (bobina de campo)
  • Material
  • Madera
  • de Radiomuseum.org
  • Modelo: CN213 - Vidor Ltd.; Erith Kent
  • Forma
  • Sobremesa apaisado (tamaño grande).
  • Ancho, altura, profundidad
  • 15 x 12.5 x 8 inch / 381 x 318 x 203 mm
  • Anotaciones

  • 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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