Duoforte 90E C81

Amalgamated Wireless (Australasia) Ltd. (AWA); Sydney

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  • Year
  • 1931
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 164777

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

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • TRF without regeneration; 2 AF stage(s); Screengrid 1926-1935
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Details
  • Record Player (not changer)
  • Power type and voltage
  • Alternating Current supply (AC) / 240 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Duoforte 90E C81 - Amalgamated Wireless
  • Shape
  • Console, Lowboy (legs < 50 %).
  • Dimensions (WHD)
  • 28.5 x 44.5 x 16.5 inch / 724 x 1130 x 419 mm
  • Notes

  • 8 Valve, AC powered, Screen Grid, TRF Radiogram with Linear Power Detection and two stages of audio amplification with the final stage being Push-Pull.
    AWA advertised for £99/- in 1931.

    Chassis:
    The chassis has a power socket on the rear for the gramophone motor connection and also incorporates a Radio/Phono change over switch. Two large boxes on the rear of the chassis house the Power Transformer in one and the power supply filtering.

    Phonograph:
    Electric Induction motor driven 78RPM turntable, automatic stop and Tone arm with volume control incorporated.

    Cabinet:
    Large Walnut console, style cabinet with phonograph lid on top and swing, Burr Walnut, doors on the front. Tuning, Volume and Tone controls and Radio/Phono switch on the front panel

     

  • Price in first year of sale
  • 99.00 AUS £
  • Literature/Schematics (1)
  • - - Manufacturers Literature (AWA Service Instruction 1931)
  AWA Duoforte 90E Pamphlet 1143 KB
  AWA Duoforte 90 C81 Service Data 150 KB
  • Documents regarding this model
  • Author
  • Model page created by Stuart Irwin. See "Data change" for further contributors.

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