The Columbus model 85 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1938.

5-valve dual-wave set, available in Columbus and Courtenay only as the agreements with all other brands had been terminated leaving Pacific, CQ, Stella and the other brands to either find new manufacturers or disappear.

Valves (5): 6A8, 6K7, 6B7, 42, 80

Frequency Bands: 2

Chassis Notes(most schematics can be clicked to download a full size version)

Radio Corp NZ - Columbus and Courtenay model 85 Schematic

General Construction Notes for Radio Corporation of New Zealand Ltd: The first digit of the serial number typically indicates the year of manufacture of RCNZ chassis' (although not the decade - that requires a little knowledge of the valves, construction, etc). Sets from around 1934 onwards were often (but not always) constructed in a distinctive pressed 'baking pan' style chassis, seemingly unique to RCNZ.

All documented models using this chassis (2 in total)

1938Columbus model 85 - this set
1938Courtenay model 85