. Practical wireless telegraphy; a complete text book for students of radio communication . vantage be-cause a broken jar can be replaced withina few minutes. In event the charging current exceeds 15,000 volts a series parallel connec-tion of condenser plates is required. This connection divides the voltage between the twobanks and thereby reduces the strain on the dielectric. Compressed air condensers are in use but the expense of construction does not warranttheir general adoption. Briefly, the construction is as follows: A number of interleavedsteel plates are enclosed in a cylindrical tank
. Practical wireless telegraphy; a complete text book for students of radio communication . vantage be-cause a broken jar can be replaced withina few minutes. In event the charging current exceeds 15,000 volts a series parallel connec-tion of condenser plates is required. This connection divides the voltage between the twobanks and thereby reduces the strain on the dielectric. Compressed air condensers are in use but the expense of construction does not warranttheir general adoption. Briefly, the construction is as follows: A number of interleavedsteel plates are enclosed in a cylindrical tank, one set of plates being insulated from thestructure. The tank is pumped to pressure of 250 pounds air pressure which has sufficientdielectric strength to withstand potentials of 25,000 volts. The dielectric losses in a con-denser of this type are, of course, zero and a permanent rupture of the dielectric mediumis not possible. The tanks are very cumbersome and some diificulty is experienced inkeeping them air tight. 107. High Frequency Choking Coils. —During the charge and discharge. Fig. 128- -Short Wave Condenser American MarconiCompany. APPLIANCES FOR A RADIO ,000 VOLTS 111
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
