Ballard, William Cyrus, Jr · New York [etc.] McGraw-Hill company, inc. · leaf 144
e oscillators. Sincethe voltage used on the tube is low compared with the Unavoltage of the system, some type of regulating resistance orrheostat must be provided to take care of the difference involtages. The most satisfactory system is to use some type of bat-tery, as this will eliminate aU… … IS o .g I MISCELLANEOUS 117 is not to be recommended for any type of continuous servicerequiring more than a small fraction of an ampere. It willsatisfactorily supply the so-called dry battery tube whichrequires about two-tenths of an ampere, but the standardtube requiring about one ampere will…
Radio
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