• Country
• New Zealand-Aotearoa

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

• Year
• 1941 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 355517

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

• Number of Tubes
• 5

• Valves / Tubes
• 6K8 6K7 6B8G 6K6G 6X5GT

• 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) / 50Hz, 230 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5 inch = 12.7 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Columbus Model 12A - Columbus Brand; Radio Centre

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes

• Columbus 12A

  5-valve broadcast (MW) superhet mantel receiver. 

  See schematics for circuit variations over time (Model 12A is hand drawn).

  Manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd.

  See also Columbus Model 12.

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

• Other Models

• Here you find 167 models, 128 with images and 156 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbus (Brand); Radio Centre Ltd.; Wellington