• Country
• New Zealand-Aotearoa

• Manufacturer / Brand
• Columbus (Brand); Radio Centre Ltd.; Wellington

• Year
• 1940

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 368286

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

• Number of Tubes
• 5

• Valves / Tubes
• 6K8G 6K7G 6B8G 6F6G 5Y3

• 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
• Alternating Current supply (AC) / 50 Hz, 230 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 22 - Columbus Brand; Radio Centre

• Shape
• Tablemodel, with any shape - general.

• Notes

• Columbus Model 22

  5-valve broadcast (MW) superhet table model receiver.

  See also:

  • Columbus O22 using some Osram valves.
  • Courtenay 22

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

• Other Models

• Here you find 176 models, 138 with images and 164 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbus (Brand); Radio Centre Ltd.; Wellington