The Columbus model 45 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1953.

5-valve broadcast band table radio - not that much fun to work on, and seemingly fragile as the author has found them to be quite problematic to get going with dodgy N78 output valves and burned out power transformers.  Also watch the dial glass as these are not always properly captive and can easily slip out and break.  Dual wave version is the 46.

Valves (5): 6BE6, 6BA6, 6AV6, 6AQ5 (or N78), 6X4

Intermediate Frequency: 455kc/s

Frequency Bands: 1

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

1953 Columbus and Courtenay model 45

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)

1953Courtenay model 45
1953Columbus model 45 - this set