WHEN you instal an aerial lead-in switch make sure that the contacts are firm and sound, and arrange that the whole switch is covered with some weatherproof device that will protect it adequately.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19310102.2.73
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Radio Record, Volume IV, Issue 25, 2 January 1931, Page 30
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33Untitled Radio Record, Volume IV, Issue 25, 2 January 1931, Page 30
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