Radio in Mines
A WIRELESS aerial may soon become a familiar sight :.t every pithead in the coal districts in England, as a result of enterprising experiments conducted in one area. The apparatus has been installed both for humanitarian and commercial purposes. A telephony transmitter and receiver at the pithead maintains communication with transmitters and receivers far underground in different sections of the mine, and it is hoped the installation will be permanent.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19321028.2.24
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Radio Record, Volume VI, Issue 16, 28 October 1932, Page 12
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73Radio in Mines Radio Record, Volume VI, Issue 16, 28 October 1932, Page 12
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