The Ye Olde Hurdy-Gurdy Museum of Vintage Radio in Howth boasts many examples of early Morse equipment, gramophones, crystal sets, valve radios and other pieces of equipment.
Pat Herbert, the curator, is always on hand to demonstrate some of the many working exhibits.
Fittingly, the Martello Tower has historic links with Marconi and Lee de Forest, two of the fathers of wireless, who conducted early experiments from the tower in the 1900s. It was also the site where the first communications cable from Holyhead in Wales to Ireland was laid in 1852.
The Howth Martello is one of a network of towers built as lookouts for an expected Napoleonic invasion.