3-valve broadcast band mains powered receiver.
This was the first mains powered radio from Courier and used a screen grid detector, pentode for the output and a rectifier valve. Advertising began in late 1929 but it is generally accepted as being a 1930 model.
John Stokes noted in an article for the NZVRS (bulletin 16.4) that this model used a wavetrap to overcome the inherent lack of selectivity resulting from the use of a single tuned circuit.
NEW ZEALAND HERALD 31 OCTOBER 1929
Valves (3):
Intermediate Frequency: TRF
Frequency Bands: 1
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