A trapezoidal concrete wireless mast stay wire anchor 14C for mast 14, for the 1923 antenna extension array, which used 400’ steel lattice masts to support the inverted-L antenna. Three such anchors per mast were used for single-height staying. Each anchor featured an iron attachment point for turnbuckle tensioners and two iron loops, used for temporary guying during construction, either side. It measures 3.5 m long by 2.6m wide and 0.75m high.

Source: Rowlands, J., Marconi's Carnarvon Station 1912-1939: a journey into early commercial wireless in north Wales' Second Edition, 2023.

RCAHMW, 2023.