• Año
  • 1952/1952 ?
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 51044

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

 Especificaciones técnicas

  • Numero de valvulas
  • 5
  • Principio principal
  • Superheterodino con paso previo de RF; ZF/IF 265 kHz; 2 Etapas de AF
  • Número de circuitos sintonía
  • 7 Circuíto(s) AM
  • Gama de ondas
  • OM (onda media) solamente
  • Tensión de funcionamiento
  • Red / Baterías o pilas / AC/DC 110-120 / 90 & 9 Volt
  • Altavoz
  • Altavoz dinámico (de imán permanente) / Ø 4.5 inch = 11.4 cm
  • Potencia de salida
  • 0.18 W (unknown quality)
  • Material
  • Plástico moderno (Nunca bakelita o catalina)
  • de Radiomuseum.org
  • Modelo: 52-643 - Philco, Philadelphia Stg. Batt
  • Forma
  • Portátil > 20 cm (sin la necesidad de una red)
  • Ancho, altura, profundidad
  • 11.25 x 8.5 x 5.5 inch / 286 x 216 x 140 mm
  • Anotaciones
  • Selenium Rectifier. Color: Brown.

    Following is replacement information for internal capacitors C4 (inside RF transformer Z1), TC2 and TC3 (inside I.F. transformer Z2), and TC4 and TC5 plus two 100pF (inside I.F. transformer Z3).  These capacitors often fail due to silver migration shorts.  Shorting of these capacitors usually results in poor reception and continuous noise. The values listed were determined for Philco part numbers 32-4399, 32-4160-2, and 32-4240-6.

       C4:  10pF on schematic but plate area appears to be in the 3 to 5pF range.  Try a smaller value if 10pF causes problems.

       TC2, TC4, and two additional in Z3:  100pF

       TC3 and TC5:  75pF

    Note that the input and output windings of the I.F. transformers are not the same and care must be taken to avoid reversing the transformers when replacing the capacitors.  Typically, all of the capacitors are removed from the aluminum enclosures and new capacitors are wired to the transformer terminals after they are remounted on the radio chassis.

  • Ext. procedencia de los datos
  • Ernst Erb
  • Referencia esquema
  • Beitman Radio Diagrams Vol. 12, 1952
  • Documentación / Esquemas (3)
  • Philco Folder 180-3436 for 1952.

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