A trapezoidal concrete wireless mast stay wire anchor, anchor 14B for mast 14, for an antenna extension array, begun in 1923, which used 400’ steel lattice masts to support the inverted-L antenna. Three such anchors per mast were used for single-height staying at 300’ up. Each anchor featured an iron attachment point for turnbuckle tensioners and two iron loops for temporary guying during mast erection, 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.