• Country
• New Zealand-Aotearoa

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

• Year
• 1938/1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 167335

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

• Number of Tubes
• 7

• Valves / Tubes
• 1A4 1C6 1A4 1A4 6N5 1F6 1F4

• Main principle
• Superhet with RF-stage; ZF/IF 456 kHz; 2 AF stage(s)

• Tuned circuits
• 9 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Storage and/or dry batteries / 135 & 6 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Columbus 68B - Columbus Brand; Radio Centre

• Shape
• Console, Lowboy (legs < 50 %).

• Notes
• Battery version of 68V. 6N5 and dial lights separately switched.

• Circuit diagram reference
• Australian Official Radio Service Manual Vol. I I

• Author
• Model page created by Stuart Irwin. See "Data change" for further contributors.

• Other Models

• Here you find 158 models, 117 with images and 147 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbus (Brand); Radio Centre Ltd.; Wellington