Environmentally controlled equipment shelters

The use of an un- insulated metal- walled equipment and battery room (inner shell), surrounded by a ventilated radiation screen and surmounted by a sun- shield roof (heat shield assembly), for a recently constructed Australian telecommunication link, is reported. It was the outcome of research and development work carried out by the Australian Post Office during the investigation stage of the project. The requirement for this type of shelter arose because of the lack of commercial electrical power supplies at most repeater sites. It would, therefore, have been uneconomic to use powered temperature- control equipment.