• Year
  • 1934 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 235439

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF with regeneration
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries / 2 & 120 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: B3 - Portadyne, Brand, Dynaport
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • May require HT dry cell with integral Grid bias or a Grid Bias battery.

    Similar circuit to an Ultra 77 which requires a tapped 9V grid battery and a 120V battery with taps according to Trader 109.

  • Author
  • Model page created by Gerry Howe. See "Data change" for further contributors.

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