COURTENAY MODEL 19 'AJAX' (1950)

The Courtenay model 19 was manufactured for Turnbull & Jones Ltd by Radio Corporation of New Zealand Ltd in 1950.

5-valve broadcast band tablegram - for further details see Columbus version.

Valves (5):
19 & 19R: 6A8, 6K7 or 6U7, 6Q7, 6K6, 6X5
19N & 19P: 6BE6, 6BA6, 6AV6, 6AQ5, 6X4

Intermediate Frequency: 455kc/s

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

19 : gram switch is toggle beside platter

19R : gram switch changed to rotary type, incorporated with tone control

19N : Updated to use miniature valves

19P : 3-speed RCNZ belt-drive turntable

1949 Columbus model 19 Schematic

1949 Columbus model 19R Schematic

1949 Columbus model 19N 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.

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).

All documented models using this chassis (2 in total)

YEARMODEL NAME
1949Columbus model 19
1950Courtenay model 19 - this set