Reducing Tramway Interference
THE tramways departments of many of the leading English cities are making special efforts to overcome interference caused to broadcast listening by defective "collectors" working on ~ the overhead power lines. As a result of much research work an im-~ proved form of collector has been gevised and is being universally adopted. —
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https://paperspast.natlib.govt.nz/periodicals/RADREC19300711.2.53
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Radio Record, Volume III, Issue 52, 11 July 1930, Page 30
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54Reducing Tramway Interference Radio Record, Volume III, Issue 52, 11 July 1930, Page 30
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