• Country
• Australia

• Manufacturer / Brand
• Airzone (1931) Ltd.; Sydney

• Year
• 1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 164155

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

• Number of Tubes
• 9

• Valves / Tubes
• 58 57 58 56 57 56 59 59 80

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 200-230; 230-250 Volt

• Loudspeaker
• 2 Loudspeakers

• Material
• Wooden case

• from Radiomuseum.org
• Model: 909 Ch= 900 - Airzone 1931 Ltd.; Sydney

• Shape
• Console, Lowboy (legs < 50 %).

• Notes

• Autodyne frequency changer. First type 56 connected as diode detector. Second type 57 used as noise suppressor.

  As shown in the schematic this radio has two electromagnetic speakers connected in parallel.

  One 10 inch and one 7 inch.

• Price in first year of sale
• 49.50 Aus£

• Author
• Model page created by Stuart Irwin. See "Data change" for further contributors.

• Other Models

• Here you find 283 models, 130 with images and 154 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Airzone (1931) Ltd.; Sydney