Gordon Cooper adds:
“Sometime in the 1950s, CAA installed two new Collins Type 231D-20 3KW auto-tune transmitters for the voice air/ground service. Neither of these are in the photos above. The transmitting station needed a change of layout to fit these into the floor space, so this picture and the control racks photo were probably taken before that happened. Those possible STC transmitters do not quite fit my memory of them. Collier & Beale made something that looked similar with lots of square holes in the front doors to help cooling.”
Notes to photo above:
View of the transmitting hall from the entrance. On the left can be seen three AWA HF transmitters: #68, #536 and #67. At the rear are three Collier & Beale HF transmitters. In the right corner is AWA #100, then coming up the right hand side are C&B #666 (500 kc/s), C&B #873 (HF), AT3 (HF), Collins #3 (500W) and Collins #15 (3kW). At the desk is Ron Turner, with Owen Pepper and Keith Bone working on #67.1
– Doug Morris
The transmitting station comprised a main transmitting hall (approx. 17 metres by 13 metres) an engine room (approx. 4 metres by 3 metres), a workshop (approximately 5 metres by 3 metres), kitchen, storage room and toilets.
MPRG member Paul Chamberlain ZL1BBR, who was a technician at Auckland Radio ZLD, recalls that the following MW and SW tranmitters were in use up until the station’s closure in 1993.
“When weather and other main broadcasts were being made, all three SSB transmitters were in operation simultaneously, covering various frequencies,” says Paul.
“The operators could use either of the MCW transmitters,” says Paul. “Both were always kept functional.
“The advantage of the Nautel [compared to the Dansk] was that if any of the sixteen power supplies or power amps failed, the others carried on. That was good for technicians.”
The Harris transmitter, being fairly new, was sold when Auckland Radio closed in 1993. All of the other transmitters are now in the Vintage Transmitters collection of the Musick Point Radio Group.
1. Morris, D.C. (2002). Auckland Radio, Alpha & Omega. Waitakere City, NZ: Copy Out West. p. 65.