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Radio-Star 560 Ch= 521

Radio-Star 560 Ch= 521; Airzone 1931 Ltd.; (ID = 280516) Radio
Radio-Star 560 Ch= 521; Airzone 1931 Ltd.; (ID = 270159) Radio Radio-Star 560 Ch= 521; Airzone 1931 Ltd.; (ID = 270160) Radio
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Radio-Star 560 Ch= 521; Airzone 1931 Ltd.; (ID = 270159) Radio
Airzone 1931 Ltd.;: Radio-Star 560 Ch= 521 [Radio] ID = 270159 515x700
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For model Radio-Star 560 Ch= 521, Airzone (1931) Ltd.; Sydney
Country:  Australia
Manufacturer / Brand:  Airzone (1931) Ltd.; Sydney
Year: 1937 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 6A7 6D6 75 42 80
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
Power out
from Model: Radio-Star 560 Ch= 521 - Airzone 1931 Ltd.; Sydney
Material Bakelite case
Shape Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

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
Literature/Schematics (1) Radio Technician (August 1939.)
Literature/Schematics (2) Australian Official Radio Service Manual AORSM (Volume 2, 1939, Page 22 (shown as 521 (chassis type)).)

Model page created by Peter Hughes. See "Data change" for further contributors.

All listed radios etc. from Airzone (1931) Ltd.; Sydney
Here you find 288 models, 98 with images and 147 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.