• Country
• Australia

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

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 151134

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A8 6K7 6J7 6F6 5Z4 or 5Y3G

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz; Anode bend detection

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 20 cm = 7.9 inch

• Power out
• 3 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 556 Ch= 518 - Airzone 1931 Ltd.; Sydney

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

• Dimensions (WHD)
• 542 x 930 x 292 mm / 21.3 x 36.6 x 11.5 inch

• Notes

• "It may frequently be found that the original metal valve types in this receiver have been replaced by "G" series valves. If this so , or such change is intended, it should be borne in mind that a shield will be necessary on the I.F. amplifier valve, and that complete re-alignment will be necessary in order to compensate for the variation in valve inter-electrode capacitances".

• Price in first year of sale
• 21.00 Aus£

• Circuit diagram reference
• Australian Official Radio Service Manual Vol. I

• Literature/Schematics (1)
• Radio Trade Annual of Australia (6th Edition 1938, Page 232.)

• Literature/Schematics (2)
• (The) Radio Retailer of Australia (1/7/1938, Page 28.)

• Literature/Schematics (3)
• Australian Official Radio Service Manual AORSM (Volume 1, 1938, Page 23.)

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

• Other Models

• Here you find 283 models, 131 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