Sky Master Late

Ever Ready Co. (GB) Ltd.; London

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1964 ?
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 174104

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

 Especificaciones técnicas

  • Numero de transistores
  • 6
  • Principio principal
  • Superheterodino en general; ZF/IF 470 kHz; 2 Etapas de AF
  • Número de circuitos sintonía
  • 7 Circuíto(s) AM
  • Gama de ondas
  • OM y OL
  • Tensión de funcionamiento
  • Pilas / 9 Volt
  • Altavoz
  • Altavoz dinámico (de imán permanente)
  • Material
  • Cuero/Tela/ Plástico sobre otros materiales
  • de Radiomuseum.org
  • Modelo: Sky Master [Late] - Ever Ready Co. GB Ltd.; London
  • Forma
  • Portátil > 20 cm (sin la necesidad de una red)
  • Anotaciones
  • Later production of Sky Master, serial numbers SMR46201 & upwards have a different temperature stabilising circuit for the audio output stage.

    This is a revision of possibly Ever Ready's second transistor set. While the Sky Leader is the first and looks identical, it's actually larger, different internally and uses the PP9 battery rather than the PP7 here.

    A PP3 or 6 x AAA in an "ersatz" PP7 box can be substituted.
    The radio has both a 3.5mm mono earphone jack socket (disconnecting the internal speaker)and a car aerial socket.

    Performance is very good.

    The AF117 are well known to fail. They can be replaced with AF127 or possibly Russian NOS Germanium 60MHz types. For the IF and L.O. often PNP Silicon such as BC557 or 2N3906 often work with no circuit modification as replacement for the unreliable AF117.
  • Procedencia de los datos
  • -- Schematic
  • Referencia esquema
  • Radio and TV Servicing books (R&TVS) book
  • Autor
  • Modelo creado por Keith Staines. Ver en "Modificar Ficha" los participantes posteriores.

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Colecciones

El modelo Sky Master es parte de las colecciones de los siguientes miembros.

 Forum

Contribuciones en el Foro acerca de este modelo: Ever Ready Co. GB: Sky Master

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If removing the chassis, note that after gently easing off the inner tuning knob the tuning must be rotated so the flats on the lower and upper parts of shaft are aligned to ease off the dial.

 

Sky Master Alignment

The dial is keyed, so no mechanical alignment of scale.

1) On MW 600kHz (5 on dial = 500m) adjust L.O. coil
2) Adjust trimmer at 1500kHz (2 on dial = 200m) for HF LO tracking
3) Peak RF reception at 1500kHz (2 on dial = 200m)
repeat / recheck 1 to 3
4) On LW adjust trimmer at 272kHz (11 on dial) or RTE half way between 11 and 13 if no generator.
5) Peak RF reception at 272kHz (11 on dial= ) or on RTE 252kHz
Verify that R4 is slightly off 15 on dial (198kHz = 1515m)

Avoid adjusting IF as the cores are fragile, likely to be seized and unlikely to need adjustment unless a radically different transistor is fitted.

 

Michael Watterson, 06.Jun.12

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