Screened Four Screengrid

Burndept Ltd. London

  • Anno
  • 1927/1928
  • Categoria
  • Radio (o sintonizzatore del dopoguerra WW2)
  • Radiomuseum.org ID
  • 77424

 Specifiche tecniche

  • Numero di tubi
  • 4
  • Principio generale
  • A reazione (con rigenerazione); 2 Stadi BF
  • N. di circuiti accordati
  • 2 Circuiti Mod. Amp. (AM)
  • Gamme d'onda
  • Onde medie (OM) e onde lunghe (OL).
  • Tensioni di funzionamento
  • Batterie (di accumulatori e/o a secco) / 100 or 120 or 150 or 180 & 20 & GB & 6 Volt
  • Altoparlante
  • - Questo apparecchio richiede altoparlante/i esterno/i.
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: Screened Four Screengrid - Burndept Ltd. London
  • Forma
  • Soprammobile a cassapanca o cassetta, solitamente con coperchio (NON a leggio)
  • Dimensioni (LxAxP)
  • 19 x 11.5 x 13 inch / 483 x 292 x 330 mm
  • Annotazioni
  • 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.
  • Peso netto
  • 9.5 kg / 20 lb 14.8 oz (20.925 lb)

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Collezioni

Il modello Screened Four fa parte delle collezioni dei seguenti membri.

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