. QST . Sonar Rodio CorporationsFCDA-approved, ModelCD-2 Transmitter, designedfor CD fixed and emer-gency operation uses theAmperex type 6252. Rodio Engineering loborotories Type 715 Transmitter,used by New York Citys Fire Department, employsthe Amperex type 5894. Type 6252$ Net.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915