Modify Selection
- Equipment, tools, and parts:
- Medium frequency communications systems
- Document types:
- Open File Reports
Home Links
Results 1 - 2 of 2
-
9/1/1984 - Contract reports, Open File ReportsThis report deals with information regarding a new Medium Frequency (MF) Wireless Communication System for underground mines. This new telecommunication system works on low loss electromagnetic wave propagation modes which allow it to provide quality ra...
-
7/1/1979 - Contract reports, Open File ReportsThis report describes a complete system design for medium frequency ( MF) wireless radio systems for use in coal mines. The emphasis is on AC mines where no trolley wire exists and, for which, conventional trolley phone communications cannot be used. Th...
Home Links
Content source: National Institute for Occupational Safety and Health, Mining Program