Chapter 2: Long-Distance Transmission Line

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Source Metadata

Field	Value
Source	Theory and Calculation of Transient Electric Phenomena and Oscillations
Year	1909
Section ID	`theory-calculation-transient-electric-phenomena-oscillations-chapter-42`
Location	lines 19339-21720
Status	candidate
Word Count	7787
Equation Candidates In Section	0
Figure Candidates In Section	0
Quote Candidates In Section	0

Opening Source Excerpt

CHAPTER II. LONG-DISTANCE TRANSMISSION LINE. 3. If an electric impulse is sent into a conductor, as a trans- mission line, this impulse travels along the line at the velocity of light (approximately), or 188,000 miles per second. If the line is open at the other end, the impulse there is reflected and returns at the same velocity. If now at the moment when the impulse arrives at the starting point a second impulse, of opposite direction, is sent into the line, the return of the first impulse adds itself, and so increases the second impulse; the return of this increased second impulse adds itself to the third impulse, and so on; that is, if alternating impulses succeed each other at intervals equal to the time required by an impulse to travel over the line and

Source-Located Theme Snippets

Waves / transmission lines

CHAPTER II. LONG-DISTANCE TRANSMISSION LINE. 3. If an electric impulse is sent into a conductor, as a trans- mission line, this impulse travels along the line at the velocity of light (approximately), or 188,000 miles per second. If the line is open at the other end, the impulse there is reflected and returns at the ...

Complex quantities

... e is one quarter wave length. 279 280 TRANSIENT PHENOMENA If then I = length of line, S = speed of light, the frequency of oscillations or natural period of the line is — '• "4? or, with I given in miles, hence S = 188,000 miles per second, it is , 47,000 /o = — j- cycles. (2) To get a resonance frequency as low as commercial frequencies, as 25 or 60 cycles, would require Z == 1880 miles for /0 = 25 cycles, and Z = 783 miles for./, - 60 cycles. It follows herefrom that many existing transmission lines are such small fractions of a qu ...

Radiation / light

CHAPTER II. LONG-DISTANCE TRANSMISSION LINE. 3. If an electric impulse is sent into a conductor, as a trans- mission line, this impulse travels along the line at the velocity of light (approximately), or 188,000 miles per second. If the line is open at the other end, the impulse there is reflected and returns at the same velocity. If now at the moment when the impulse arrives at the starting point a second impulse, of opposite direction, is sent into the ...

Dielectricity / capacity

... , - 60 cycles. It follows herefrom that many existing transmission lines are such small fractions of a quarter-wave length of the impressed frequency that the change of voltage and current along the line can be assumed as linear, or at least as parabolic; that is, the line capacity can be represented by a condenser in the middle of the line, or by condensers in the middle and at the two ends of the line, the former of four times the capacity of either of the two latter (the first approximation giving linear, the second a para- bolic distribution). Fo ...

Chapter-Local Concept Hits

Concept Candidate	Hits In Section	Status
Frequency	18	seeded
Wave length	12	seeded
Light	11	seeded
Ether	2	seeded
Radiation	2	seeded
Velocity of light	2	seeded

Chapter-Local Glossary Hits

Term Candidate	Hits In Section	Status
wave length	12	seeded
ether	2	seeded

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Modern Engineering Reading Prompts

Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
Complex quantities: Track how Steinmetz preserves geometric rotation and quadrature while translating the same operation into symbolic form.
Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
Transients / damping: Separate the temporary term from the final steady-state term and compare with differential-equation response language.

Ether-Field Interpretive Boundary

Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
Dielectricity / capacity: A Wheeler-style reading may emphasize dielectric compression, field stress, and stored potential, but this page treats that as interpretation unless Steinmetz explicitly says it.
Transients / damping: Transient collapse, impulse, and surge behavior can be compared with alternative field language, but only as a clearly marked reading.

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