L-740 De Luxe Beam-a-Scope

General Electric Co. (GE); Bridgeport CT, Syracuse NY

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  • Année
  • 1941/1942
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 42473
    • Brand: Musaphonic

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

 Spécifications techniques

  • No. de tubes
  • 7
  • Principe général
  • Super hétérodyne avec étage HF; FI/IF 455 kHz
  • Gammes d'ondes
  • PO et 2 x OC
  • Tension / type courant
  • Alimentation Courant Alternatif (CA) / 110-125 Volt
  • Haut-parleur
  • HP dynamique à aimant permanent + bobine mobile / Ø 6.5 inch = 16.5 cm
  • Puissance de sortie
  • 5.5 W (qualité inconnue)
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: L-740 De Luxe Beam-a-Scope - General Electric Co. GE;
  • Forme
  • Modèle de table avec boutons poussoirs.
  • Dimensions (LHP)
  • 17 x 11.5 x 11 inch / 432 x 292 x 279 mm
  • Remarques
  • The model General Electric L-740 De Luxe Beam-a-Scope has dial lamps: 2 Mazda Nº44. This three-band set covers the broadcast frequencies from 550-1720 Khz and shortwave from 1.7 - 5.2 and 5.2 - 18.1 Mhz. With seven tubes including an RF amplifier, it is a good receiver. Two 6K6 tubes work in a push-pull configuration.

    Some info found on Internet by "Chas" (in S. Dartmouth, MA) about the Beam-a-Scope: "The rotatable loops in the later model consoles are usually model specific in design. They utilized different types of input circuitry built within the loop. Often the loop itself was shielded with a wire cage or foil. Sometimes an external antenna coupler is built in. Can be either extra turns on the main coil or a smaller inductor nested within the larger coil. If you want the full performance of the G-E try to find the correct Beam-A-Scope for that radio." We can add to that: Sometimes you will find two loop antennas called "Beam-s-Scopes" by General Electric. Then the second Beam-a-Scope comes into operation if the user chooses the highest shortwave band. With that, a better shortwave reception is achieved without a long wire antenna (which still would be better).
  • Prix de mise sur le marché
  • 54.95 $
  • Source extérieure
  • Ernst Erb
  • Source du schéma
  • Rider's Perpetual, Volume 13 = 1942 and before
  • Schémathèque (1)
  • General Electric Radio Service Notes 1939-1942

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