Method of using constant level sound systems for loudspeakers in railroad service; data on amplifiers, use of feedbacks, life of tubes, impedence matching and load distribution; advantages are in improved performance with reduced installation and maintenance problems.


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    Title :

    70 volt sound systems


    Additional title:

    Ry Signaling Communications


    Contributors:
    Bowen, J.L. (author)


    Publication date :

    1955


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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