The Ultimate COU was manufactured by Radio (1936) Ltd in 1939.
All-wave radio, 6 or 7 valve (exact specs unknown) with magic eye tuning.
Similar to the model CNU
Valves (6 (or 7?) + magic eye): Probably similar to CNU
Intermediate Frequency: 256kc/s
Chassis Notes (most schematics can be clicked to download a full size version):
No schematic currently held, check model CNU as it should be very similar (both same year, both same design, both all-wave)
General Construction Notes for Radio (1936) Ltd: Early Radio Ltd. schematics did not show the models, just the year, valves and bands, so some sleuthing is required to find the right one.
Early 30's Ultimate models with three digit model numbers indicated both the number of valves in the set, and the price it retailed for - for example, the model 856 was an 8-valve radio which retailed for $56 pounds. The equivalent Courier models were reversed, so an Ultimate 856 was a Courier 568 (theoretically, at least). This was the Auckland price though, and often the sets would retail for 1 or 2 pounds more in other centres, presumably to cover the freight cost of moving them around the country from the Auckland factory.
Note the use of old resistance terminology on older schematics: ω means ohms and Ω means megohms.
Some 1936-onward 3-letter chassis codes vary the last letter between brands, for example:
BBU - Ultimate model BB
BBR - Rolls (and Golden Knight) model BB
BBC - Courier model BB
All use the same chassis.
Golden Knight, Courier and Rolls appear to use the same copper-painted chassis while Ultimate chassis' are painted silver