570 Ch= 530
Airzone (1931) Ltd.; Sydney
- Country
- Australia
- Manufacturer / Brand
- Airzone (1931) Ltd.; Sydney
- Year
- 1937
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 166419
Click on the schematic thumbnail to request the schematic as a free document.
- 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 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 8 inch = 20.3 cm
- Material
- Wooden case
- from Radiomuseum.org
- Model: 570 Ch= 530 - Airzone 1931 Ltd.; Sydney
- Shape
- Console, Lowboy (legs < 50 %).
- Notes
-
Airzone model "570" is a five-valve broadcast reception console using chassis type "530" and arranged for operation from 200-250 volt A.C. mains. Three controls are fitted, these being for volume, tuning and tone (three positions). This model was introduced late in 1937 and uses an 8-inch, 2,000 ohms field loudspeaker.
The circuit arrangement of this receiver is fairly straightforward, and should present no particular difficulty. Attention should be paid, however, to the use of the oscillator padding condenser (C2) for oscillator grid blocking instead of the conventional grid condenser on the "hot" side of the coil - note also that the oscillator grid resistor (R3) is shunted directly across C2 instead of being wired between the grid and earth. Other points to note are the low value (0.002 mfd (μF)) of the oscillator plate by-pass condenser (C3), and the use of the 75 cathode resistor (R10) as part of the screen voltage divider network. (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 (October 1939, Page 107.)
- Literature/Schematics (2)
- Australian Official Radio Service Manual AORSM (Volume 2, 1939, Page 27 (shown as 530 (chassis type)).)
- Author
- Model page created by Stuart Irwin. See "Data change" for further contributors.
- Other Models
-
Here you find 285 models, 136 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