| 1. |
A CONSTANT FREQUENCY OSCILLATOR |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 267-276
Carl W. Miller,
Howard L. Andrews,
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摘要:
The frequency of a vacuum tube oscillator depends not only upon the constants of the oscillating circuit but also upon those of the tube itself. In a tuned plate circuit, operating with minimum coupling the influence of the tube on frequency depends only on its plate resistance, and decreases as the plate resistance is increased. The steady drift in frequency usually observed is due mainly to the effect on the plate resistance of progressive changes in the filament. Due to their rugged filaments the UX852 and the screen grid UX860 have been found particularly suitable for steady oscillators.Two methods of compensating for small changes in plate voltage and filament emission are described. A curve is included showing the effect of temperature on the frequency of the oscillator. The apparatus used for this precise study of small frequency changes is described. One of its most valuable features is an audio oscillator which is controlled by a vibrating string.
ISSN:0034-6748
DOI:10.1063/1.1748690
出版商:AIP
年代:1930
数据来源: AIP
|
| 2. |
NOTE ON A MODIFIED RANDALL UNIVERSAL CALIBRATION CURVE FOR BALLISTIC GALVANOMETERS |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 277-280
Richard H. Frazier,
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摘要:
An experimental‐graphical method is given for the determination of the critical damping resistance of a ballistic galvanometer. The curve used turns out to be a modification of the Randall Universal Calibration Curve which can be represented in the region of underdamping by a very readily drawn straight line with a maximum error of 1.8 percent.
ISSN:0034-6748
DOI:10.1063/1.1748691
出版商:AIP
年代:1930
数据来源: AIP
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| 3. |
A VACUUM TUBE ELECTROMETER |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 281-284
H. Nelson,
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ISSN:0034-6748
DOI:10.1063/1.1748692
出版商:AIP
年代:1930
数据来源: AIP
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| 4. |
THE USE OF THE GRID GLOW TUBE IN A THERMOREGULATOR |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 285-288
James H. Hibben,
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ISSN:0034-6748
DOI:10.1063/1.1748693
出版商:AIP
年代:1930
数据来源: AIP
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| 5. |
A SODIUM‐ARGON GLOW‐TUBE |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 289-291
Herbert J. Reich,
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ISSN:0034-6748
DOI:10.1063/1.1748694
出版商:AIP
年代:1930
数据来源: AIP
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| 6. |
A NEW RESEARCH MICROSCOPE |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 292-294
W. L. Patterson,
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ISSN:0034-6748
DOI:10.1063/1.1748695
出版商:AIP
年代:1930
数据来源: AIP
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| 7. |
A RATIOMETER |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 295-296
W. A. Parlin,
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ISSN:0034-6748
DOI:10.1063/1.1748696
出版商:AIP
年代:1930
数据来源: AIP
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| 8. |
A POINT‐SOLDERING PENCIL |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 297-298
Urner Liddel,
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ISSN:0034-6748
DOI:10.1063/1.1748697
出版商:AIP
年代:1930
数据来源: AIP
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| 9. |
A SIMPLE MANOMETER AND SOURCE FOR HOT VAPORS |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 299-301
C. T. Zahn,
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ISSN:0034-6748
DOI:10.1063/1.1748698
出版商:AIP
年代:1930
数据来源: AIP
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| 10. |
ABSTRACTS OF ARTICLES RELATING TO NEW INSTRUMENTS AND METHODS |
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Review of Scientific Instruments,
Volume 1,
Issue 5,
1930,
Page 303-308
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PDF (223KB)
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ISSN:0034-6748
DOI:10.1063/1.1748699
出版商:AIP
年代:1930
数据来源: AIP
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