Twin

Bogen (-Presto), David Co., Inc.; New York, NY / Paramus, NJ

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  • Année
  • 1953
  • Catégorie
  • Emetteur / récepteur commercial (TRX non amateur)
  • Radiomuseum.org ID
  • 145568

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 Spécifications techniques

  • No. de tubes
  • 3
  • No. de transistors
  • Principe général
  • 3 Etage(s) BF
  • Circuits accordés
  • 1 Circuits MA (AM)
  • Gammes d'ondes
  • Bandes en notes
  • Tension / type courant
  • Appareil tous courants (CA / CC) / 110 - 120 Volt
  • Haut-parleur
  • HP dynamique à aimant permanent + bobine mobile / Ø 3.5 inch = 8.9 cm
  • De Radiomuseum.org
  • Modèle: Twin - Bogen -Presto, David Co., Inc.
  • Forme
  • Modèle de table générique
  • Remarques

  • The David Bogen Model Twin is an AC/DC Operated Two or More Station Wireless Intercommunication System.

    The system operates by modulating the AC power line (or GND if using an AC with GND plug) with an Amplitude Modulated (AM) frequency between 160-196kHz.  Therefore, all units must be connected to the same phase AC power line, such as in a single building.  A single slug-tuned oscillator tunes to the desired transmit/receive frequency channel between 160 - 196kHz. (nominal is 175kHz).

    Another independent net of units may also operate on the same AC power line by tuning the first net units to the low end, near 160kHz, and the second net units to the upper end, near 196kHz.

    A "Silent Watchman" mode may be enabled by pressing the Push-to-Talk button down and to the left to lock one unit to the Transmit mode; thus, all other units may continuously and silently listen to that one unit, much like a baby monitor is used today.

  • Auteur
  • Modèle crée par Egon Penker. Voir les propositions de modification pour les contributeurs supplémentaires.

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