Release of war time developments of micro-frequency radio, using multi-channel time pulse modulation, disrupts previous conceptions of use of line wires as well as carrier on wires, while Western Union adds to confusion by announcing adoption of new radio systems, thereby abandoning ownership of pole lines on railroad.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Railroad telegraph and telephone saw big change in 1945


    Additional title:

    Ry Age


    Contributors:
    Dunn, J.H. (author)

    Published in:

    Railway Age ; 120 , n 1


    Publication date :

    1946


    Size :

    5 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


    Railroad telegraph traffic

    Birt, W.R. | Engineering Index Backfile | 1922


    Telegraph and telephone section

    Engineering Index Backfile | 1930


    Telegraph and telephone section

    Engineering Index Backfile | 1936



    The railroad telephone

    Hammond, C.A. | Engineering Index Backfile | 1902