Historical information

Radio Telephone was minuted during the war. it was approved in 1944 for the State Electricity Commission of Victoria's use only. it was completed by the end of 1946. used by the State Electricity Commission of Victoria at Bogong during the construction of the Kiewa Hydro Electric Scheme to connect with head office in Melbourne. It allows one conversation at a time using traffic controls in an unusual system of radio telephone providing communication. At the time it was unique in Australia and installed by the S.E.C.V. technicians. It provided unattended shortwave radio link between two ordinary telephone switchboards, connecting any of the S.E.C.V.'s internal lines with the telephone system at Bogong and the construction camps beyond. From Bogong, radio phones connected to the outpost stations on the High Plains far above the snow-line. In operation, the service was similar to a normal telephone system but dispensed with the physical connection of wires and poles between the main terminals.

Significance

Historical: This headphone set superseded headphones with two earpieces and those without a microphone. This one may have been used by operators on the switchboard at Bogong or Mt Beauty or one of the construction camps on the Kiewa Hydro Electric Scheme. The S.E.C.V. installed this unique system of communication to operate their branches especially at Bogong and beyond where the distance was great and often limited by the terrain and weather.

Physical description

Radio Telephone for SECV switchboard. Black plastic earpiece with microphone. Ear side circular with inscription on outer side then formed into elongated shape narrowing to the curved speaker piece at the narrow end. On top of the narrow end a long rubber cord is attached to a thick brass pin. On top of the wider end a thin stiff wire is attached to curve around the head to a blank rubber earpiece. This head piece has a piece of rectangular rubber attached at the top for comfort.

Inscriptions & markings

'4408A IW61 / 1'