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Cefn Du, Radio Station, Concrete Base XXXI

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NPRN505873
Map ReferenceSH56SW
Grid ReferenceSH5396360466
Unitary (Local) AuthorityGwynedd
Old CountyCaernarfonshire
CommunityWaunfawr
Type Of SitePLATFORM
PeriodModern
Description

A concrete wireless mast stay anchor, anchor 7A for mast 7, of which four were used per 1914 antenna mast. It measures 3.7m long by 3.7m at the base (3.7m x 2m at top) and up to 1.1m high. Mass of ca. 98 tons. Five steel ‘eyes’ providing attachment points for a total of seven guy wire tensioning turnbuckles splayed out and ran deep into the concrete. The form was used widely across the Marconi Empire wireless scheme.

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

RCAHMW, 2023.