Majestic 181 Ch= 180

Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1929
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 43608

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

 Especificaciones técnicas

  • Numero de valvulas
  • 9
  • Principio principal
  • RFS sin reacción; 3 Etapas de AF; Neutrodyne
  • Número de circuitos sintonía
  • 4 Circuíto(s) AM
  • Gama de ondas
  • OM (onda media) solamente
  • Especialidades
  • Tocadiscos (sin cambiador autom)
  • Tensión de funcionamiento
  • Red: Corriente alterna (CA, Inglés = AC) / 90-130 Volt
  • Altavoz
  • Altavoz electrodinámico (bobina de campo) / Ø 8 inch = 20.3 cm
  • Material
  • Madera
  • de Radiomuseum.org
  • Modelo: Majestic 181 Ch= 180 - Grigsby-Grunow -Hinds Co.
  • Forma
  • Consola baja, patas más cortas del 50%.
  • Anotaciones

  • This radio is a cascade of 3 individual TRF stages, each with its own feedback coil forming a Wheatstone bridge acting as a Hazeltine neutralization for the triode (described as the RFL circuit in contemporary sources). The feedback polarity is reversed with respect to the signal polarity through the Cag Miller-capacitance, in effect neutralising the triode tendency to oscillate.

    The antenna circuit has a separate tuning coil, to be readjusted with each tuned frequency.

    The tuning scale is graduated with 2 scales: One in frequency from 550 to 1500 kHz and the other as a linear scale from 0 to 100. 

    LF coupling between stages is done by transformers - Push-pull output.

    The unit contains a separate 8P6 or 8P3 power supply unit with individual transformers for the filaments and the 425 Volt anode supply. A current regulator is included in the primary circuit of the power transformers to compensate for mains voltage changes between 90 and 130 Volt AC.

  • Precio durante el primer año
  • 265.00 $
  • Ext. procedencia de los datos
  • Ernst Erb
  • Referencia esquema
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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