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SH5460 : Frontal view of the old Marconi building on Cefn DuSH5460 : Building V, Marconi Wireless Station, Cefn DuSH5460 : Olion gorsaf radio Marconi / Remains of the Marconi wireless stationSH5460 : Roofless former Marconi building on the western summit of Cefn Du

Olion gorsaf radio Marconi
Remains of Marconi's radio station

Relics of the first successful Marconi long wave transmitting station are situated on the west-northwest slopes of Cefn Du. Much of the complex has survived on the hillside, thanks to the rugged nature of the concrete constructed footings. The extensive site, approached from the village of Waunfawr to the west, ranges over 2 square kilometres. The transmitter house still exists at the end of the entry drive, and on the high ground to the east are substantial remains of numerous radio mast bases, access tracks and ancillary buildings. Fragments of metal and ceramic insulators still litter the landscape. The station was in use from before the First World War until 1938 and was for many years the most important long wave station in Britain, handling worldwide communications. It was complemented by a receiving station at Tywyn in Merioneth SH5800.

Harri Williams, Marconi and his Wireless Stations in Wales. Llanrwst: Gwasg Carreg Gwalch, 1999
John Rowlands, Marconi's Carnarvon Station 1912-1939. 2022, 2nd ed. 2023

Coflein