Screened Four Screengrid

Burndept Ltd. London

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  • Année
  • 1927/1928
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 77424

 Spécifications techniques

  • No. de tubes
  • 4
  • Principe général
  • Récepteur TRF - par réaction (régénératif); 2 Etage(s) BF
  • Circuits accordés
  • 2 Circuits MA (AM)
  • Gammes d'ondes
  • PO et GO
  • Tension / type courant
  • Piles (rechargeables ou/et sèches) / 100 or 120 or 150 or 180 & 20 & GB & 6 Volt
  • Haut-parleur
  • - Ce modèle nécessite des HP externes
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: Screened Four Screengrid - Burndept Ltd. London
  • Forme
  • Modèle de table boitier avec vouvercle
  • Dimensions (LHP)
  • 19 x 11.5 x 13 inch / 483 x 292 x 330 mm
  • Remarques
  • Burndept Wireless Ltd., London (from Witt Brunham of Burnham & Co.) has manufactured a few early screen grid radios under the name of "Screened". They first used the double ended valve S625 but in the next year the single ended 220SG was used. See also Bowyer-Lowe Co. Ltd. in Letchworth for such sets.

    This model Screened Four has a mahogany case with sloping exposed mahogany control panel and hinged fielded panel lid. The early double-ended S625 screened grid valve from Marconi-Osram (designer H.J. Round, MO Valve Co. Ltd.) is visible in the top of the cabinet after lifting the lid. At the back there is an opening which leads to terminal board with 12 posts with clamping screws: Aerial, +/- Loudspeaker, +/- GB (Grid Bias), HIgh Tension 2 (HT2 +) with possible GB values for 100 (10.5), 120 (15), 150 (22.5) and 180 (30), High Tension 1 (HT1 +) and HT-, Heater 6 V +/-, Gram and Earth. There is a sticker with the mentioned valves including the Heater Resistors and the Grid Bias for the given HT2-values.
  • Poids net
  • 9.5 kg / 20 lb 14.8 oz (20.925 lb)

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Le modèle Screened Four fait partie des collections des membres suivants.

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