Browning-Drake Four

Queensland Radio News, The; Brisbane, QLD

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1928
  • Categoría
  • Kit (Partes con instruciones) o Solo Instrucciones
  • Radiomuseum.org ID
  • 331749

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

 Especificaciones técnicas

  • Numero de valvulas
  • 4
  • Principio principal
  • RFS con reacción (regenerativo); Reaction
  • Gama de ondas
  • OM (onda media) solamente
  • Tensión de funcionamiento
  • Baterías recargables o pilas / 6 & 4½ & 2 x 45 Volt
  • Altavoz
  • - Este modelo usa altavoz exterior (1 o más).
  • Material
  • Madera
  • de Radiomuseum.org
  • Modelo: Browning-Drake Four - Queensland Radio News, The;
  • Forma
  • Sobremesa, caja, normalmente con tapa (panel no inclinado).
  • Anotaciones

  • The Queensland Radio News version of the Browning-Drake four valver.
    Unique among four valve circuits, is the Browning-Drake, in that it is the only circuit in this class which has stood the test of time, and emerged, four years after it was first published, with undiminished popularity. There is no doubt in the minds of those who are familiar with the various types of multi-valve sets that the Browning-Drake Four is easily the equal of many five-valve arrangements, and there is a very good reason for its splendid performance
    Glen H. Browning and F. H. Drake, both Harvard University men, and originators of the circuit which bears their name, set out on their experiments with a definite object in view. Their ambition was to design a receiver using a single stage of radio frequency amplification and valve rectifier, and to increase the operating efficiency of this combination to a point which had not hitherto been approached.
    A radio-frequency transformer was designed mathematically in which the windings were so proportioned and disposed that a very large transfer of energy was obtainable without the amplifier becoming unstable. This transformer was later designated the "Regenerformer" (a combination of the two words "regeneration" and "transformer"), and may be described as the foundation of the Browning-Drake receiver. To ensure a high degree of stability in the RF amplifier, this valve is neutralised, while additional amplification almost equal to that provided by a second RF stage is due to the use of regeneration or reaction in the detector circuit; this reaction, it should be noted, is at all times under perfect control. The Queensland Radio News, June 1, 1928, Page 7.

    lnput coil (L1) and Regenerformer (L2) are supplied by Radiokes in the Master Browning  Drake kit

  • Mencionado en
  • -- Original prospect or advert (The Queensland Radio News, June 1, 1928, Page 7)
  • Autor
  • Modelo creado por Gary Cowans. Ver en "Modificar Ficha" los participantes posteriores.

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