Agilent 1955-04 free download

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HEWLETT-PACKARD JOURNAL T E C H N I C A L I N F O R M A T I O N F R O M T H E - h p - L A B O R A T O R I E S Vol. 6 No. 8 mf^M U.ISHED BY THE HEWLETT-PACKARD COMPANY, 275 PAGE MILL ROAD, PALO ALTO, CALIFORNIA APRIL, 1955 A New 10 CPS-600 KC High Stability VTVM L·iS^ spring -hp- introduced a vacuum duced by low or high line voltages. Typi tube voltmeter of a special new design cally, a change in line voltage from 105 to which operated up to more than 4 me and 127 volts will cause in the voltmeter reading which had an extremely high stability. This a change which is scarcely perceptible in the voltmeter has become one of the most pop middle region and which is less than 0.5% at ular instruments -hp- has the ends of the frequency range. Rated accu SEE ALSO: "Waveform Effects ever produced. racy for the instrument is within 2% of full on Voltmeters," p. 3 The same basic design has scale from 20 cps to 100 kc and within 3% of now been extended to a new companion full scale from 10 cps to 600 kc. This accu voltmeter which operates from 10 cps to racy applies for any line voltage in the 103- 600 kc, measures voltages as low as 0.3 milli 127 volt range. volt, is virtually unaffected by line voltage The instrument covers a voltage range levels from 103 to 127 volts, and has a high from 3 millivolts full scale to 300 volts full input impedance of 10 megohms shunted by scale in 1 1 ranges. Since readings can easily 25 mmf. be made down to at least one-tenth of full An accuracy curve typical of the perform