Teslascope
From Tardis Wiki, the free Doctor Who reference
The Teslascope was a device, created by Nikola Tesla. According to Dorothy Skerrit, he used it to intercept the Mars signal in 1903. (TV: Nikola Tesla's Night of Terror)
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In the real world, though Nikola Tesla is purported to have made such a device by this time, it was only later coined the "Tesla scope" by Tesla's apprentice Arthur Matthews, after the two constructed a smaller version together in 1918.
