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Saltash & District Amateur Radio Club (SADARC)

Captain Henry Jackson's Radio Experiments

HMS Defiance, Wearde Quay, Saltash. Picture courtesy of the Saltash Heritage Collection
The group of vessels which formed the HMS Defiance Torpedo School, off Wearde Quay, Saltash, when Captain Henry Jackson was in command, 1895-1897. Some of Jackson's experiments involved a gunboat, HMS Scourge (a tender to Defiance), making radio transmissions while steaming up the Lynher estuary for a distance of two miles, and down the Hamoaze for three miles.
(Picture courtesy of the Saltash Heritage Collection)



Captain Henry Jackson RN, 1897. Picture courtesy of the Saltash Heritage Collection
Captain Henry Jackson on board Defiance in 1897.
In that year he completed his experiments in wireless telegraphy, and demonstrated continuous communication with another vessel up to three miles away. He also set up a permanent radio link between Defiance and Admiralty House at Mount Wise, Devonport..
(Picture courtesy of the Saltash Heritage Collection)



. Picture courtesy of the Saltash Heritage Collection
Captain Jackson's receiver of 1897, in an incomplete state. Possibly it is an early reproduction, not the original set. It is kept at HMS Collingwood, near Fareham, Hampshire.
(Picture courtesy of the Saltash Heritage Collection)



. Picture courtesy of the Saltash Heritage Collection
Captain Jackson built this wireless transmitter in 1897. It is preserved in the wireless museum at HMS Collingwood, near Fareham, Hampshire.
(Picture courtesy of the Saltash Heritage Collection)



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