Specification prescribes limits of intensity of interference producing electric field set up by electric equipment of street cars and trackless trolleys, and by overhead lines associated therewith, as measured at frequency within range 200 to 1500 kc and at prescribed distance from source of interference; standard rating and safety requirements for components for reducing interference.
British standard specification for radio-interference suppression for trolley-buses and tramways
Brit Standards Instn -- Brit Standard Specification
1939
36 pages
Standard
Englisch
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