• 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
4 ES46 LINEAR IC`s AND APPLICATIONS
4 ES46 LINEAR IC`s AND APPLICATIONS

... Explain the operation o f an inverting Schmitt trigger circuit with different UTP and LTP voltages with the help of suitable c irc u it. Discuss the design procedure for components used. Also indicate the input and output characteristics for the inverting Schmitt trigger circuits. Design a second or ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)

X-ray Imaging System
X-ray Imaging System

... X-ray tube current is controlled by the filament circuit Thermionic emission is based upon temp of the filament measured in amperes (A) Filaments operate at 3 – 6 amps, 6-12 volts Fixed mA stations as resistors Falling load generators – Max mA, drops ...
Electrostatic motor
Electrostatic motor

... Principle: This type of motor is based on Coulomb forces, and its energy output is related to the change in electrostatic energy that occurs when charges are moved between the terminals of a high-voltage (HV) supply. This is different from a regular motor, which is based on magnetic forces and the c ...
DATASHEET: Furman AR-1220
DATASHEET: Furman AR-1220

... also be converted to usable levels, depending on how far out of range they are. The AR-1220 can handle loads totaling up to 20 amps as long as the input voltage is above 124 volts. For ...
Transient PSpice Analysis (7.4)
Transient PSpice Analysis (7.4)

... • With Q1 and Q2 off, the capacitor holds a charge that represents the stored data bit. • This charge leaks through Q2, the input of the sense amplifier, and the capacitor. • To determine the time before a refresh is necessary, we can use a simple equivalent circuit. ECE201 Lect-23 ...
PowerPoint: Self induction in a coil and Back
PowerPoint: Self induction in a coil and Back

... R then = 38 ohms. I= V/R = 130 v/38 ohms = 3.4 amps. ...
Objective bits
Objective bits

... 6. The relation between Real power (P), Reactive Power (Q) and Apparent Power(S) is S2= P2+ Q2 7. Power factor of an AC circuit is defined as Reactive power / Apparent power 8. An ac current is given as i(t)=10+10 sin(314t), its Average value is 10 9. The magnitude & phase of current vector is depen ...
Controlled Power Co. Welcomes MGE
Controlled Power Co. Welcomes MGE

... • Testing has shown that the voltage conditions on the rig exceed the standard input window of a commodity UPS during a majority of their operating time. These UPS topologies use their batteries to supply the load continuously and are not effective when power fails. ...
Grounding and Shielding Existing Equipment
Grounding and Shielding Existing Equipment

... where a neutral line is used. As can be seen from the drawing, the earth ground and the neutral are connected to the same potential at the power box. The difference is that neutral is a current carrying conductor. Should the signal be monitored at this point, one would not likely see voltage fluctua ...
Servo Stabiliser - Vertex Power Solutions Pvt Ltd
Servo Stabiliser - Vertex Power Solutions Pvt Ltd

... Vertex Power Solutions Pvt. Ltd., is managed by a team of Engineers with over 25 years of experience in the field of Power conditioning Equipment. The Products are manufactured at Chennai, under the brand name of VERTEX. VERTEX, through its quality products & service, has made its presence felt in v ...
App Note 509 - What is Regulation and Repeatability?
App Note 509 - What is Regulation and Repeatability?

... Reference 1. Capacitor Charging Power Supply Design For High Pulse To Pulse Repeatability Applications. G. L. Bees and A. Tydeman. IEEE Pulsed Power Conference 1999. ...
2 - Stephen F. Austin State University
2 - Stephen F. Austin State University

N48039497
N48039497

Open circuit Test and Short circuit Test
Open circuit Test and Short circuit Test

... The LV side of the transformer is short circuited. Now with the help of variac applied voltage is slowly increased until the ammeter gives reading equal to the rated current of the HV side. ...
Chapter 21
Chapter 21

... An AC power generator produces 50 A (rms) at 3 600 V. The voltage is stepped up to 100 000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of 100 Ω. What percentage of the power delivered by the generator is dissipated as heat in the ...
TYPE VOG - Precise
TYPE VOG - Precise

... PRECISE PRECISE VOLTAGE TRANSFORMER TYPE VOG PRECISE Voltage Transformers model type VOG are connected in between phase to earth to provide a proportional low voltage on secondary side. They are design to perform the following functions: 1. Measure/monitor voltage 2. Electrically isolate the instrum ...
SG2525 SG3525 smps pwm
SG2525 SG3525 smps pwm

... Figure 2 : Oscillator Discharge Time vs. R D and C T . ...
figure 10-1
figure 10-1

... 3) Select Firing Control Signal A as input to the Chopper Circuit Board and as trigger signal for the Oscilloscope. 4) Make sure that the voltage control is turned fully counterclockwise and turn on the Power Supply. Turn on the Oscilloscope. 5) Slowly turn the voltage control clockwise until the vo ...
ch31
ch31

DS 2006/008
DS 2006/008

... d) does not accept that the non-intrinsically safe voltage Um can be seen at the intrinsically safe circuits or charge internal capacitance, even though voltage limitation is non-existent. e) states that the use of blocking capacitors does not provide for galvanic isolation of the intrinsically safe ...
Bipolar Tesla Coils
Bipolar Tesla Coils

DS 2006/008
DS 2006/008

Amateur Extra Licensing Class
Amateur Extra Licensing Class

unit3-1
unit3-1

< 1 ... 313 314 315 316 317 318 319 320 321 ... 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