Part of a giant transmitter which played a significant behind the scenes role in World War II has been donated to a museum in Wiltshire.
The tuning coil measures eight-metres wide and is 11m high
The tuning coil made out of copper and wood, and resembling a giant spider's web, will be exhibited at the Science Museum in Wroughton during the summer.
It was once part of the BT Rugby Radio Station in Warwickshire.
The station - callsign GBR - also sent encrypted data to ships and submarines during the Cold War.
A spokesman for the Science Museum said they were delighted to receive the tuning coils.
"They are a wonderful, almost monumental reminder of worldwide radio communications in their early pioneering days," he said.
When GBR opened on 1 January 1926, the station was said to be the most powerful in the world.
Initially it transmitted using Morse code on 16kHz with an aerial power of 350kW derived from thermionic valves.