• Country
• Australia

• Manufacturer / Brand
• Australectric Ltd.; Sydney, NSW

• Year
• 1918

• Category
• Commercial Receiver (may include amateur bands)

• Radiomuseum.org ID
• 299112

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

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• TRF with regeneration

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Batteries / addl. power jack / 6 V, 160 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Expanse Triple Magnifying Receiver 103 - Australectric Ltd.; Sydney,

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Notes

• The Model 103 was the first Marine Valve receiver designed by AWA and manufactured by Australectric Co. for Australian ships. It consisted of one stage of RF, a detector and an audio stage.  The set covered reception from 300 to 6000 metres. Additional inductance could be added to increase the coverage to 15000 metres.

  The Model 103A was also available which covered 300 to 15000 metres.

  The radio incorporates a crystal detector which can be switched into circuit for use as an Emergency Crystal Receiver should the valve circuit fail.

  The receiver can be switched to receive either “undamped” or “damped” spark radio waves.

  Results from land based and ship based stations were included in the manufacturers literature for this receiver on page 5.

  Land Station

  Aerial 120 ft long, 70 ft high, at Wahroonga, NSW, Australia.
  First direct messages, England to Australia, received at 1:15PM, Sept 23, 1918.

  Signals from:-
  Carnarvon, Wales            12,000 miles
  Nauen, Germany             11,000 miles

  Ship Stations

  1. Aerial 90 ft high, 160 ft long.
  Darien                    8,000 miles
  Nauen                  11,000 miles
  Pearl harbour        4,000 miles daylight

  2. Aerial 60ft high 90 ft long
  Darien                    8,000 miles
  Nauen                  11,000 miles
  Pearl harbour        4,000 miles daylight

  See uploaded page 5 for more results.
  An excellent example of this receiver is preserved in Museum Victoria, article 12665.

• Mentioned in
• - - Manufacturers Literature (Receiver Operators Handbook)

• Author
• Model page created by Gary Cowans. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 6 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Australectric Ltd.; Sydney, NSW