• Año
  • 1932/1933
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 43625

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 Especificaciones técnicas

  • Numero de valvulas
  • 11
  • Principio principal
  • Superheterodino con paso previo de RF; ZF/IF 175 kHz
  • Número de circuitos sintonía
  • 7 Circuíto(s) AM
  • Gama de ondas
  • OM (onda media) solamente
  • Tensión de funcionamiento
  • Red: Corriente alterna (CA, Inglés = AC) / 117 Volt
  • Altavoz
  • Altavoz electrodinámico (bobina de campo)
  • Material
  • Metálico
  • de Radiomuseum.org
  • Modelo: Majestic Ch= 300 Twin Speaker - Grigsby-Grunow -Hinds Co.
  • Forma
  • Chasis (tambien de autoradio)
  • Anotaciones
  • The series 300 models are fitted either with a large G-14-F speaker or have twin speaker G-19-B and G-19-C. Grigsby-Grunow uses here the first time their "Automatic Synchro-Silent Tuning", variing a tuning light by a reactor with 3 legs of iron core. Two legs are connected in series with the pilot light, while the winding on the center leg is connected in series with the plates of the RF First Detector, and IF tubes. An electrolytic condenser (C-5) shunts the center winding for not getting any AC if there are unbalances. They call the system also "Reactance Resonance Indicator". When a station is tuned in, an automatic bias voltage is built across Resistor R-9, causing the pilot light to dim.
  • Ext. procedencia de los datos
  • Ernst Erb
  • Referencia esquema
  • Rider's Perpetual, Volume 3 = 1933 and before
  • Mencionado en
  • Rider's Changes 7-11

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