Note Filter 358

MIM, Marconi International Marine; Chelmsford Essex

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1930 ??
  • Categoría
  • Amplificador de audio o mezclador
  • Radiomuseum.org ID
  • 257257

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 Especificaciones técnicas

  • Numero de valvulas
  • 3
  • Válvulas
  • Principio principal
  • Amplificador de Audio
  • Gama de ondas
  • - no hay
  • Tensión de funcionamiento
  • Baterías recargables o pilas / 2 or 4 or 6 & 72 Volt
  • Altavoz
  • - - No hay salida de sonido.
  • Material
  • Metálico
  • de Radiomuseum.org
  • Modelo: Note Filter 358 - MIM, Marconi International
  • Forma
  • Boatanchor (militar, profesional >20 kg).
  • Anotaciones

  • The note filter Type 358 consists of three stages of AF transformers with variable cores, the secondary of each transformer being tuned in each case to the required AF frequency range. It may be tuned to accept any "note" from approx. 800 to 1,200 cycles.

    The device is specifically designed for operation with receiver Type 352, and suitable for working with either 2, 4, or 6-volt valves, the anode voltage being of the order of 72 volts.

    A three-position switch determines the mode of operation. In mode "in", the note filter follows the AF valve of the 352 receiver. In the "off" position, filaments are disconnected and there is no through circuit to the headphones. Position "out" has the filaments equally disconnected, but a through circuit is arranged between the telephones and the receiver.

    Amplification and selectivity of the note filter can be controlled by means of a filament rheostat.

  • Mencionado en
  • - - Manufacturers Literature

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