• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
MP49 Music Transmission and reception with high S/N ratio using
MP49 Music Transmission and reception with high S/N ratio using

... Fiber Optics is the technique of transmitting light through transparent, flexible fibers of glass or plastic. An optical fiber acts as a waveguide, or "light pipe", to transmit light between ...
Four identical strain gauges are mounted on an aluminum rod as
Four identical strain gauges are mounted on an aluminum rod as

... (b) Show a schematic of how the gauges are mounted in a bridge so that two are active and the other two provide temperature compensation. The bridge voltage is to be 5.1 volts from a zener. Use the labels, A, B, C, D, to show where the gauges are mounted in the bridge. ...
Faraday`s Law and the Genecon
Faraday`s Law and the Genecon

... smallest number of turns. Connect the voltmeter in 20V ac~ mode to the secondary coil with the smallest number of turns. 2. Turn the voltage adjustment all the way counter clockwise. Set the power supply to the lowest range ac voltage. Turn on the power supply. 3. Adjust the voltage to about 5.0V. R ...
4. RLC series resonance
4. RLC series resonance

A Brief History of Planetary Science
A Brief History of Planetary Science

... How would you change Vrms, R , and w to increase the current through an RLC circuit? d) What specific relationship between L and C would produce the maximum current through a RLC circuit? ...
What do all these have in common? What are they - Physics-S3
What do all these have in common? What are they - Physics-S3

McGruer.
McGruer.

... 4 x 10-19 = ½ CV2 gives C = 2 x 10-19 F << electrode capacitance! Much more energy stored in local electrodes than switch. ...
intrinsic safety overview - IEEE Standards working groups
intrinsic safety overview - IEEE Standards working groups

... Devices such as transmitters, power supplies, batteries, capacitors, and inductors can create or store energy that is greater than the allowable intrinsic safety limits set forth by the governing body. The danger is generally not in their energy storage capacity but in the intentional or accidental ...
Applications of the Piezoelectric Effect from Vibration
Applications of the Piezoelectric Effect from Vibration

• - Lattice - University of Florida
• - Lattice - University of Florida

... Personnel performing this procedure will have training provided by the equipment manufacturer or by a trained UF personnel. PURPOSE ...
power quality measurement with capacitor voltage
power quality measurement with capacitor voltage

... from a conventional device in terms of a wide bandwidth frequency response is of offered by a resistive-capacitor divider (RCD), which is very expensive, has a very limited output and would not normally be present in a substation environment and does not meet safety requirements for isolation betwee ...
sheet3
sheet3

... 3. Why is Hartley oscillation not suitable for low frequency work? 4. What are the conditions of oscillation in the Hartley and Colpitts Oscillators? 5. In order to sustain oscillation in a Hartley oscillator, what will be the minimum value of the feedback resistor and frequency of oscillation with ...
Knight_ch35
Knight_ch35

... 4. It’s not possible to tell without knowing t. ...
Experiment11-RC PHASE-SHIFT OSCILLATORS
Experiment11-RC PHASE-SHIFT OSCILLATORS

... RC PHASE-SHIFT OSCILLATORS Theory Oscillator circuits can be built using opamps with feedback to phase-shift the output signal by 180º. Phase-shift: In a phase-shift oscillator, as shown in Figure 1 three sections of resistor-capacitor are used. The resulting oscillator frequency can be calculated u ...
Knight_RLC circuits
Knight_RLC circuits

... 4. It’s not possible to tell without knowing t. ...
VREF_Reference_Voltage
VREF_Reference_Voltage

... Voltage references are needed before the ADCs or DACs may be used. See Reference Manual, Ch 9, Fig 9.1 ...
Download T4500 Datasheet
Download T4500 Datasheet

The Power Diode
The Power Diode

... (resistor R), the current flowing in the load resistor is therefore proportional to the voltage (Ohm´s Law), and the voltage across the load resistor is the same as the supply voltage, Vs (minus Vf), that is the "DC" voltage across the load is sinusoidal for the first half cycle only. Then Vout = V ...
Key Ignition Concepts to Know
Key Ignition Concepts to Know

... named after Joseph Henry. In our work with coils, we also use millihenries which are 1/1000th of a Henry, and microhenries, which are 1/1,000,000th of a Henry. Inductors can store electrical energy in the form of a magnetic field. We do this by using a lower voltage, operating over a longer period o ...
Honda CB650, CB750F-1100F Spark Unit Set
Honda CB650, CB750F-1100F Spark Unit Set

Abstract - 1000kv technologies
Abstract - 1000kv technologies

... The Bridge rectifier is a circuit, which converts an ac voltage to dc voltage using both half cycles of the input ac voltage. The Bridge rectifier circuit is shown in the figure. The circuit has four diodes connected to form a bridge. The ac input voltage is applied to the diagonally opposite ends o ...
File
File

WACKER - 0007896 Ø 45 mm Internal Vibrator
WACKER - 0007896 Ø 45 mm Internal Vibrator

solutions
solutions

... What is the phase difference between the voltages across L and C in a series LCR-circuit connected to an a.c. source? Given a current in series LC, voltage in L leads current by 900 phase and voltage in C lags behind current by 900 phase. So voltages in L and C differ by a phase of 1800 ...
Chapter 21
Chapter 21

< 1 ... 339 340 341 342 343 344 345 346 347 ... 367 >

Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report