789

Stromberg-Carlson (Australasia) Pty. Ltd. Sydney

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  • Année
  • 1937
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 165398

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 392 kHz; 3 Etage(s) BF
  • Circuits accordés
  • 7 Circuits MA (AM)
  • Gammes d'ondes
  • PO et OC
  • Tension / type courant
  • Piles (rechargeables ou/et sèches) / 135 & 2 Volt
  • Haut-parleur
  • HP dynamique à aimant permanent + bobine mobile / Ø 10 inch = 25.4 cm
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: 789 - Stromberg-Carlson Australasia
  • Forme
  • Console avec pieds bas < 50% de la hauteur
  • Remarques

  • Model 789 Stromberg-Carlson Seven-Valve DW battery powered Superhet.

    High sensitivity and low noise level are outstanding features of the latest Model 789 Stromberg-Carlson seven-valve dual-wave release.

    Exceptionally high sensitivity is assured by the use of a 1A4 as RF amplifier, and of two stages of intermediate frequency amplification (also using 1A4's). A KK2 is used as a mixer, with a 1B5 as a second detector, AVC, and first audio stage feeding a 30 driver with a KDDI as class "B" power output stage.

    Throughout the entire design, particular attention has been paid to keeping current consumption as low as possible. A special switch is also incorporated, enabling the dial lights to be extinguished when the set is in operation, further reducing battery drain.

    An edge-lit vertical straight line tuning dial, identical to that used in the eight and nine valve A.C. receivers, is fitted. The stations are marked in large clear-cut figures and are divided vertically into States, while the four international overseas channels are grouped on the left-hand side of the dial.

    The tuning range is from 175-570 metres on the broadcast band and 16.8 to 51 metres on the short waves. A large control knob gives speedy, easy tuning, having dual dial ratios of sixty and ten to one.

    A 10" dust-proof permanent magnetic dynamic speaker is fitted, which, combined with the outstanding acoustic properties of the Concert Grand Cabinet, gives the  789 a high degree of tonal quality and faithfulness of reproduction under a wide range of atmospheric conditions and · geographical obstructions.

    An additional feature is the variable tone control.
    Controls from left to right are as follows:-

    • On-off and dial lights switch,
    • Volume
    • Tone
    • station selector
    • wave changer and gram switch.

    Altogether, the 789 is a dual-wave battery receiver that will fill the demand for a deluxe radio for the man on the land.

    Australasian Radio World, Sep 1, 1937. Page 36.

     

  • Source du schéma
  • Australian Official Radio Service Manual Vol. I
  • Littérature
  • Australasian Radio World, Sep 1, 1937. Page 36.
  • Auteur
  • Modèle crée par Stuart Irwin. Voir les propositions de modification pour les contributeurs supplémentaires.

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