Radio-Star 560 Ch= 521

Airzone (1931) Ltd.; Sydney

  • Year
  • 1937
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • ID
  • 109116

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

 Technical Specifications

  • Number of Tubes
  • 5
  • 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) / 200-250 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 6.5 inch = 16.5 cm
  • Material
  • Bakelite case
  • from
  • Model: Radio-Star 560 Ch= 521 - Airzone 1931 Ltd.; Sydney
  • Shape
  • Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.
  • Notes
  • Airzone model "560" is a five-valve receiver, using chassis type "521", which is designed for dual-wave coverage and operating from 200-250 volts A.C. mains. This receiver is housed in a moulded cabinet of the mantel type, and is fitted with four controls - volume, tuning, wave-change (with wave-band indication by dial-scale illumination), and tone (3 positions). The loadspeaker fitted to this receiver is a 6½ inch unit with a field coil resistance of 1,500 ohms. This receiver was introduced during 1937.

    The design of this receiver is quite conventional and circuit analysis should present no particular difficulty. Points to watch are the shunt-fed oscillator feed-back system; the section of the wave-change switch which short-circuits the broadcast oscillator grid coil when the receiver is adjusted for S.W. operation; and the bleed bias system for the type 75 triode section. (RADIO TECHNICIAN)

  • Price in first year of sale
  • 19.95 AUS £
  • Circuit diagram reference
  • Australian Official Radio Service Manual Vol. I I
  • Author
  • Model page created by Peter Hughes. See "Data change" for further contributors.

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The model Radio-Star is part of the collections of the following members.