. Practical wireless telegraphy; a complete text book for students of radio communication . shed for vessels of large tonnage requiringthe maximum possible transmitting range, but type P-5 is particularly suitablefor small yachts, cargo-carrying vessels and tug boats. It should be kept in mind,however, that set P-5 or type P-9 have sufficient range to comply with the inter-national regulations on vessels of any tonnage. Although the yi K. W. and 2 K. W. panel transmitters are now standard for ship service,a number of vessels in the American Marconi Companys service are still fitted with com-po
. Practical wireless telegraphy; a complete text book for students of radio communication . shed for vessels of large tonnage requiringthe maximum possible transmitting range, but type P-5 is particularly suitablefor small yachts, cargo-carrying vessels and tug boats. It should be kept in mind,however, that set P-5 or type P-9 have sufficient range to comply with the inter-national regulations on vessels of any tonnage. Although the yi K. W. and 2 K. W. panel transmitters are now standard for ship service,a number of vessels in the American Marconi Companys service are still fitted with com-posite sets popularly known as the 1 K. W. non-synchronous set and the 2 K. W. 240cycle set. Several vessels are fitted with a yS K. W. 120 cycle panel transmitter (Type E-2)but the manufacture of this type has been discontinued. In this chapter, all sets now in use in the ship service will be described in de-tail and such information will be supplied as will enable the operator to adjust theapparatus to its maximum degree of efficiency. The 2 K. W. panel set will firstbe described. «5 L. STANDARD MARINE SETS OF AMERICAN MARCONI CO. 225 186. Details of Type P-4 Panel.—^The complete 2 K. W. panel set comprisesthe following apparatus: (1) Panel Transmitter consisting of the necessary power measuring instru-ments, oscillation transformer, condenser, variable and plug type aerialtuning inductance, quenched spark gap, motor and generator fieldrheostats, wave length changing switch, several resistance units and acompensating reactance regulator. (2) Crocker-Wheeler or General Electric 2 K. W. 500 Cycle Motor Generatorwith synchronous rotary spark gap mounted on the generator shaft, pro-tective condensers, starting resistance, automatic motor starter and neces-sary controlling appliances. (3) Type 106 Receiving Tuner with crystal rectifier and head telephonereceiver. (4) Type I Aerial Change-Over Switch with necessary appliances for protect-ing the receiving apparatus from the transm
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
