Researches in Radio Telephony
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The filament is made of lime-coated platinum and for this reason requires such a small filament current. The p-rid is composed of a number of turns of tunrsten wire, spaced equally on either side oi the filament. The plates are niade of sheet nickel about ^" x 1" placed on either side of the rrid and is placed far enough arvay to with- stand a voltace of 300 under normal operation. V/ith this plate voltae and normal filament current the output in the -rid circuit is about 100 milliamperes, and ...in the ^:.late circuit is about 150 milliamperes.
12 FigU-Te 9 shows the arran~ement of the filament, [-rid and plate in this type of vacui;jn valve and Figures 10-11 sho\'7 the characteristic curves as a two element and three element bulb.
In the test carried on with the type of bulb described above we found that the bulb is designed to v/ithstand an overload of about 200fo without brealcinr down and if care is taken the plate voltare can be run up to 750 without dis- asterous results. At this volta: e or above the bulb suddenl^^ breaks dovm, that is, sparking oc- curs between the plate and filament without the characteristic blue -^-low which ordinarily occurs before breakdov/n between conductors.
What to read after Researches in Radio Telephony?
You can find similar books in the "Read Also" column, or choose other free books by Petzing, Erwin Walter to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The filament is made of lime-coated platinum and for this reason requires such a small filament current. The p-rid is composed of a number of turns of tunrsten wire, spaced equally on either side oi the filament. The plates are niade of sheet nickel about ^" x 1" placed on either side of the rrid and is placed far enough arvay to with- stand a voltace of 300 under normal operation. V/ith this plate voltae and normal filament current the output in the -rid circuit is about 100 milliamperes, and ...in the ^:.late circuit is about 150 milliamperes.
12 FigU-Te 9 shows the arran~ement of the filament, [-rid and plate in this type of vacui;jn valve and Figures 10-11 sho\'7 the characteristic curves as a two element and three element bulb.
In the test carried on with the type of bulb described above we found that the bulb is designed to v/ithstand an overload of about 200fo without brealcinr down and if care is taken the plate voltare can be run up to 750 without dis- asterous results. At this volta: e or above the bulb suddenl^^ breaks dovm, that is, sparking oc- curs between the plate and filament without the characteristic blue -^-low which ordinarily occurs before breakdov/n between conductors.
What to read after Researches in Radio Telephony?
You can find similar books in the "Read Also" column, or choose other free books by Petzing, Erwin Walter to read onlineMoreLess
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