• Country
• Australia

• Manufacturer / Brand
• Astor (brand), Radio Corporation Pty., Ltd.; Melbourne

• Year
• 1959–1962

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 233482

• • alternative name: Radio Corp.of Australia

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

• Number of Transistors
• 7

• Semiconductors
• 2N486 or. OC44 2N484 or. 2N308 or. OC45 2N484 or. 2N309 or. OC45 2N362 or. 2N363 or. OC75 2N363 or. OC71 or. TS2_STC or. TS3_STC 2N632 or. 2N185 or. OC72 2N632 or. 2N185 or. OC72 1N295 1N295

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm

• Power out
• 0.25 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Transistor 7 GPN - Astor brand, Radio Corporation

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 9 x 6.25 x 3 inch / 229 x 159 x 76 mm

• Notes

• This is an earlier model than the GPN-A using a different transistor selection. The radio uses tag strip construction rather than the printed circuit board of the GPN-A. The plastic case appears (from photographs) to similar or identical to the later model.The weight is without battery. Anything other than the most basic service work requires that the metal chassis be removed from the case.

  There are 8 colour combinations listed in the Technical Bulletin uploaded under Schematics and there are 10 transistor combinations listed with some minor component changes as well as 2 different NTC resistors, again with resulting component changes. A comprehensive list of component parts is also included.

  The case, ferrite rod antenna, tuning gang and speaker are all direct transplants from the (4 Valve) RQ model from 1955 which was still on sale in 1958 as an alternative to the HPN.

  • Comes with shoulder bag.
  • Four dial scales to suit NSW, VIC/TAS, QLD & SA/WA.
  • Rola Type 3C loudspeaker.
  • Battery Eveready Type 276P or equivalent.

  Cabinet front & escutcheon colour combinations: Cherry Red/White, White/Cherry Red, Grey/Cherry Red, Old Rose/Charcoal, Charcoal/Lime, Cherry Red/Grey, Charcoal/Old Rose & Lime/Charcoal.

  Cabinet rear section colours: Cherry Red, Charcoal, White, Old Rose, Grey & Lime.

  Handle and grip assembly colours: Cherry Red, Charcoal, White, Old Rose, Grey & Lime.

• Net weight (2.2 lb = 1 kg)
• 1.410 kg / 3 lb 1.7 oz (3.106 lb)

• Price in first year of sale
• 35.70 AUS £

• Literature/Schematics (1)
• - - Manufacturers Literature (Astor Technical Bulletin GPN-1, 7/10/1959. (Also at KevinChant.com))

• Literature/Schematics (2)
• J.R. Publications Transistor Radio Service Handbook (Vol. 1, 1960, Page A19.)

• Literature/Schematics (3)
• J.R. Publications Transistor Radio Service Handbook (A Series Handbook, Page A59.)

• Literature/Schematics (4)
• Mingay's Price Service (Feb 1960 to Feb 1962.)

• Author
• Model page created by Brian Wilson. See "Data change" for further contributors.

• Other Models

• Here you find 851 models, 465 with images and 357 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Astor (brand), Radio Corporation Pty., Ltd.; Melbourne