COLUMBUS MODEL 27 (1948)

The Columbus model 27 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1948, production ran for 3 years.

5-valve dual-wave set.  Superseded by the model 27N which used miniature valves.

Valves (5): 6K8, 6K7, 6Q7, 6V6, 6X5GT

Intermediate Frequency: 455kc/s

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

Original lab drawing for the model 27, 6 November 1947.  These lab schematics were distributed as photographs, presumably the quickest way at the time for them to mass copy information to allow Columbus Radio Centres and Turnbull & Jones service agents access to service info before the official documentation had been prepared and printed.

1949 Columbus model 27 lab schematic

Official schematic, 2 September 1948 - almost one year later.

RCNZ Model 27 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)

YEARMODEL NAME
1948Columbus model 27 - this set
1948Courtenay model 27