A filter for the elimination of noises to be fitted at the set end of the a.c. mains. This should be encased in metal and connected with the ground.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19310814.2.37.3
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Radio Record, Volume V, Issue 5, 14 August 1931, Page 29
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29A filter for the elimination of noises to be fitted at the set end of the a.c. mains. This should be encased in metal and connected with the ground. Radio Record, Volume V, Issue 5, 14 August 1931, Page 29
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