Sky Master Late

Ever Ready Co. (GB) Ltd.; London

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  • Année
  • 1964 ?
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 174104

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 Spécifications techniques

  • No. de transistors
  • 6
  • Principe général
  • Super hétérodyne (en général); FI/IF 470 kHz; 2 Etage(s) BF
  • Circuits accordés
  • 7 Circuits MA (AM)
  • Gammes d'ondes
  • PO et GO
  • Tension / type courant
  • Piles sèches / 9 Volt
  • Haut-parleur
  • HP dynamique à aimant permanent + bobine mobile
  • Matière
  • Cuir / canvas / plastique mais autre matériel en dessous!
  • De Radiomuseum.org
  • Modèle: Sky Master [Late] - Ever Ready Co. GB Ltd.; London
  • Forme
  • Portative > 20 cm (sans nécessité secteur)
  • Remarques
  • 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.
  • Source
  • -- Schematic
  • Source du schéma
  • Radio and TV Servicing books (R&TVS) book
  • Auteur
  • Modèle crée par Keith Staines. Voir les propositions de modification pour les contributeurs supplémentaires.

 Collections | Musées | Littérature

Collections

Le modèle Sky Master fait partie des collections des membres suivants.

 Forum

Contributions du forum pour ce modèle: Ever Ready Co. GB: Sky Master

Discussions: 1 | Publications: 1

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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