History of Science Museum: Collection Database Search

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The label simply states that this coherer was used in France. However the date of 14/7/99 would indicate that coherer may also have been used on transmission tests from the battleship Alexandra to the Needles station over a distance of 87 miles. A few months later in September, this coherer was probably used to perform transmissions from Wimereux, France to Dover, England - the first cross-channel wireless communication.

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