Hasler carrier current system linking stations and rail cars on two routes of Chemins de Fer des Montagnes Neuchateloises, Switzerland; method uses h-f carrier currents, which pass to and from overhead contact line (1500-v d-c) through coupling condensers, associated with choke coils where necessary to block carrier currents from certain parts of traction circuits.
Telephone communication on overhead contact lines
Ry Gaz
Railway Gazette ; 94 , n 20
1951
Article (Journal)
English
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