Columbus 5A

Columbus (Brand); Radio Centre Ltd.; Wellington

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  • Année
  • 1951 ?
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 304547

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

 Spécifications techniques

  • No. de tubes
  • 5
  • Principe général
  • Super hétérodyne (en général); 2 Etage(s) BF
  • Circuits accordés
  • 6 Circuits MA (AM)
  • Gammes d'ondes
  • PO uniquement
  • Tension / type courant
  • Alimentation Courant Alternatif (CA) / 50Hz, 230 Volt
  • Haut-parleur
  • HP dynamique à électro-aimant (électrodynamique) / Ø 5 inch = 12.7 cm
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: Columbus 5A - Columbus Brand; Radio Centre
  • Forme
  • Modèle de table sans poussoirs, modèle cheminée
  • Remarques

  • Columbus Model 5A

    The model 5 series was in production for a few years and was released in four different variants with two valve lineups.  The models were the 5, 5A, 5B and 5M.

    The model 5 was originally specified to use an octal 6K6** output valve, although its likely that most have a 6V6.  There is also a release note stating it would most likely change to be a 6AQ5 in time.  It also showed an octal 6X5GT rectifier.  All subsequent models have a full miniature valve lineup.  The early schematic showing octal output and rectifier valves has no date or drawing number and may be a draft drawing, or an unofficial release to meet requests from service departments around the country.  A subsequently released 'Model 5' drawing dated August 1951, almost a year after the release note, shows all miniature valves.  Its unclear if RCNZ was referring to the original model 5 or all available variants at that time (although not all variants had the shown loop antenna).

    The later versions also had a better spread of the frequency band as can be seen on the dial scales.

    The model 5B has a wider dial, with a narrower speaker grill to compensate, and uses a standard aerial coil rather than the loop aerial the other models have.

  • Auteur
  • Modèle crée par Stuart Irwin. Voir les propositions de modification pour les contributeurs supplémentaires.

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