A small square concrete base for a 30 foot tall steel lattice mast, part of an extensive support system for an elevated counterpoise for the 1914 long wave antenna array, installed ca. 1919 to replace a former, buried ground screen. It measures 0.5m square by 0.2m high, with embedded remnant steel lattice feet.

Source: Rowlands, J., Marconi's Carnarvon Station 1912-1939: a journey into early commercial wireless in north Wales' Second Edition, 2023. Dimensions by P.J. Schofield, OANorth, 10th December 2007.

RCAHMW, 2023.