Artikelrobot
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A visit to Crieff in June 2004 is described, in which measurements were made to assess the emissions of a Power-Line Telecommunications (PLT) system and its propensity to cause interference to HF radio reception
http://www.southgatearc.org/news/september2005/bpl_effects.htm
http://www.southgatearc.org/news/september2005/bpl_effects.htm