457B

Airzone (1931) Ltd.; Sydney

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  • Year
  • 1948
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 187301

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 90 & 1.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: 457B - Airzone 1931 Ltd.; Sydney
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 10.5 x 10.375 x 6.75 inch / 267 x 264 x 171 mm
  • Notes

  • MODEL: 457B.

    Features: 4V, B/C portable; AVC; 5" speaker; movement of door switches set on and off; aerial countersunk in outside of case; separate aerial and earth terminals; door-fastening clip opens with single finger pressure; moulded plastic handle; uses one 741 and two 482 batteries. Cabinet finished in leather cloth; various colours; fitted with four rubber feet; measures 10⅜" high, 10½" wide, 6¾" deep; weight (with batts.) 19 lbs.

    Retail selling price: £25/19/6 (incl. batts.); £1 extra in WA & NQ.

    Battery types used:

    • (A) 1 x 741 (Eveready) or 3741 (Diamond)
    • (B) 2 x 482 (Eveready) or 3482 (Diamond)

    See also Peal model P457B & Philco model 48/4SP.

  • Price in first year of sale
  • 25.95 AUS £
  • Circuit diagram reference
  • Australian Official Radio Service Manual Vol. VII
  • Mentioned in
  • Radio Electrical Weekly, Portables Supplement, 29/10/1948.
  • Author
  • Model page created by Stuart Irwin. See "Data change" for further contributors.

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