• Country
• Australia

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

• Year
• 1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 182047

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A8G 6U7G 6B6G 6V6G 5Y3G

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Alternating Current supply (AC) / 240 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Symphony Leader 5057A Ch= 537A - Airzone 1931 Ltd.; Sydney

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Notes

• Chassis is the same as as the earlier Model 537 with the exception that a 6V6 is used in place of the 6F6.

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

• Mentioned in
• HRSA Radiowaves, No. 46, October 93, page 21

• Literature/Schematics (1)
• Mingay's Radio Diagram & I.F. Index

• 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