Longest functioning tin can telephone

Longest functioning tin can telephone
Who
John Hems
What
373.79 metre(s)
Where
United Kingdom (Sidmouth)
When

The longest functioning tin can telephone is 373.79 m (1,226 ft 4 in) and was achieved by John Hems and Sidmouth Science Festival (both UK), in Sidmouth, Devon, UK, on 8 October 2022.


This attempt was organised to promote STEM subjects into the community, and was just one of many highlights during the 10-day festival.