Originally it appears (from advertising in March/April 1930) that the receiver was just called the 'Courtenay' or the 'Courtenay Local Receiver', however by November advertising shows there were two models. The 3-valve model was now known as the Courtenay Jr. and a new model was introduced, the Courtenay Snr, with several variants. By the following year the 3-valve offering would be renamed again, to the model 6 (one of aound five different models available by the end of 1931).
Intermediate Frequency: TRF
Chassis Notes(most schematics can be clicked to download a full size version)