• Country
• Australia

• Manufacturer / Brand
• Birks, Charles & Co. Ltd. (Airvoyce, Rocket); Adelaide, SA

• Year
• 1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 291050

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Wave bands
• Broadcast only (MW).

• 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: Airvoice Chum - Birks, Charles & Co. Ltd.

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Notes

• Advertised in The Adelaide Advertiser (SA) 30 January 1933, Page 9 for Aus£8/15/-.

• Price in first year of sale
• 8.75 Aus£

• Mentioned in
• The Adelaide Advertiser (SA) 30 January 1933, Page 9

• Author
• Model page created by Gary Cowans. See "Data change" for further contributors.

• Other Models

• Here you find 7 models, 7 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Birks, Charles & Co. Ltd. (Airvoyce, Rocket); Adelaide, SA