Always bring in your lead-in through a porcelain or ebonite tube. If the bare wire of the lead-in is permitted to touch the window-sill there is sure to be a loss in signal strength.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19271209.2.58
Bibliographic details
Radio Record, Volume I, Issue 21, 9 December 1927, Page 14
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34Untitled Radio Record, Volume I, Issue 21, 9 December 1927, Page 14
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