COLUMBUS MODEL 92 (1954)

The Columbus model 92 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1954.

A smaller 'budget' version of the model 90.  The magic ear tone system was removed and replaced with a simple tone control, and while the model 90 featured a 10" speaker, the 92 used the more common 8" model (Note: the photographed model has a Pye oval speaker fitted, this is not the original).

Valves (6 + magic eye): 6K7G, 6K8G, 6K7G, 6B8G, 6V6G, 5Y3G and Y63 Magic Eye

Intermediate Frequency: 455kc/s

Frequency Bands: 5

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

1954 model, however many sighted examples show a first digit of 1 - was there an early version of the model 92?  Or was this an anomoly.

1954 Columbus model 92

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.

Model codes beginning with a 0, for example the model 051, are Osram valve versions of the model without the leading 0. Technically the 0 should be an O (for Osram), however the digit 0 was used throughout the site before this fact was discovered.

The E suffix indicates a magic eye option is fitted (in models which were available with or without, such as the model 25).

A and B suffixes appear to be simply updates to the current model, R also appears to be simply an updated model ('R'edesign, perhaps?)

P indicates either a permanent magnet speaker version of a model which also came with an electromagnet speaker (the model 26 for example), or a portable model (like the model 694P).

N and M indicated miniature valve versions of a model which started with all (or a mix, ie: model 5) of larger valves. One of these two codes may indicate a transitional mixture of octal and miniature - clarification is required.

S often indicates a stereo model.

Finally, other suffixes and prefixes make occasional appearances in the RCNZ lineup - like the 66W (a variant of the long-running model 66) and the 75XA (a 10-valve version of the model 75 with a separate amplifier chassis).