We do not have dates for the following series of photos, although the Marconi Canada CSR5 receiver, which appears near the bottom of the first photo, was introduced in 1942.
Although it is believed that these photos were taken at Auckland Radio, it is not yet clear whether the racks were at the receiving station (Musick Point) or the transmitting station (Oliver Road). The racks do not appear in any other photos we have of either site.
The racks all appear to have been mounted on top of desks.
All photos courtesy Chris Underwood.