Apparatus Drawings Project. Report Number 30A. A Versatile RC-Filtered Low-Voltage Power Supply and a Calibrated Direct-Coupled Amplifier
作者:
Robert G. Marcley,
期刊:
American Journal of Physics
(AIP Available online 1962)
卷期:
Volume 30,
issue 10
页码: 738-744
ISSN:0002-9505
年代: 1962
DOI:10.1119/1.1941776
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
A versatile RC-filtered power supply and a calibrated direct-coupled amplifier are described. The power supply furnishes operating power to various electronic devices developed for two large introductory laboratories. It provides about 250 V dc at its rated output of 70 mA, and 2.5 A at 6.3 V ac. The direct-coupled amplifier has 6 output ranges, from 0.5 to 150 V full scale. Its normal input resistance is 22 MΩ, with stable operation at input resistances of 125 MΩ being practical. Output is displayed on an external 100-μA meter. The method of achieving calibration accuracies of ±2% or better, using ±10% tolerance carbon resistors is described. Both instruments are stable and extremely reliable, requiring only standard commercial components and conventional tools and techniques for construction. The cost for parts is $16.26 and $22.05, respectively. The article contains full information regarding construction.
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