• 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
Ignition System Fundamentals
Ignition System Fundamentals

ETU-LINK Product Specification - ETU
ETU-LINK Product Specification - ETU

... input and receiver output impedance is 100 Ohms differential. Data lines are internally AC coupled. The module provides differential termination and reduce differential to common mode conversion for quality signal termination and low EMI. SFI typically operates over 200 mm of improved FR4 material o ...
Power_Conditioning_Supplemental_2007_ans 1
Power_Conditioning_Supplemental_2007_ans 1

... Briefly describe the principle of operation of the device T1 including an explanation of how the device is made to turn on and off. T1 will not conduct when reverse biased – i.e. on negative half cycles of the 220 V 50 Hz supply. When T1 is forward biased it will not commence conduction until a suff ...
TM_406
TM_406

... Voltage across it is VR = V2 – V3 V 2 (V  V3 ) 2 Power loss = R = 2 ...
Chapter 21
Chapter 21

... Apparatus An induction coil is connected to two large spheres forming a capacitor  Oscillations are initiated by short voltage pulses  The inductor and capacitor form the transmitter ...


... .c. ) Transverse magnetic d ). Transverse electric 33. When for a transmission line the open circuit and short circuit impedance are 20W and 5 W respectively then the characteristic impedance of the line is .a. ) 100 Ohms b ). 50 Ohms .c. ) 25 Ohms .d. ) 10 Ohms 34. In an ideal transmission line wit ...
ETU-LINK Product Specification - ETU
ETU-LINK Product Specification - ETU

... input and receiver output impedance is 100 Ohms differential. Data lines are internally AC coupled. The module provides differential termination and reduce differential to common mode conversion for quality signal termination and low EMI. SFI typically operates over 200 mm of improved FR4 material o ...
RA NGER : VIKING
RA NGER : VIKING

... connected triode sections of a 12AX7 working into a parallel connected 12AU7 power driver. Extra high speech gain permits the use of virtually any communications type dynamic or crystal microphone. A three circuit microphone connector is provided to facilitate connection, i.f desired, for push-to­ t ...
Powerpoint - University of Toronto Physics
Powerpoint - University of Toronto Physics

... because of their ability to store energy. • The charge on the two plates is ±Q and this charge separation establishes a potential difference ΔV = Q/C between the two electrodes. • In terms of the capacitor’s potential difference, the potential energy stored in a capacitor is ...
ECE2006 LABORATORY 9
ECE2006 LABORATORY 9

... Phasors In sinusoidal AC systems, it is often tedious to calculate circuit voltages and currents using the standard tools of KVL, KCL and Ohm’s Law because the signals are described as sinusoidal functions of time. It is easier computationally to convert the sinusoids into Phasor form prior to apply ...
Three-channel white-LED driver uses simple step
Three-channel white-LED driver uses simple step

Voltage and Current
Voltage and Current

... In this circuit the battery, resistor and lamp all have 6V across them. The 30mA current through the resistor and the 60mA current through the lamp add up to the 90mA current through the battery. ...
Complex Impedance
Complex Impedance

... A filter must have at least one component with has an impedance that varies with frequency. The impedance is given by the time dependent ratio of voltage across the component to current through the component. This means that a filter must contain at least one inductance or capacitance. An inductor con ...
Full-Range Stable Operation of Parallel
Full-Range Stable Operation of Parallel

... Electrostatic parallel-plate actuation is limited to displacements up to 1/3 of the gap due to the pull-in effect [1,2]. This limits the use of electrostatic parallel-plate actuation in many applications. In order to overcome this limitation several techniques have been proposed: geometry leverage [ ...
Unit 8: Electronic Circuit Design and Construction
Unit 8: Electronic Circuit Design and Construction

... Draw and label a diagram of the 1N4001 general purpose diode connected in forward bias and reverse bias mode Measure the forward characteristic of the diode between 0.5 volts and 0.7 volts using steps of 0.01 of a volt by adjusting the resistance box R1 Measure and record the reverse characteristic ...
sathyabama university - IndiaStudyChannel.com
sathyabama university - IndiaStudyChannel.com

... mechanical power of 7.46 KW and operates at 0.9 pf lagging. Its effective resistance is 0.8 ohm. If the iron and friction losses are 500 W and excitation losses are 800 W, estimate the armature current .calculate the commercial efficiency. (b) A 75 KW,3 phase star connected ,50 Hz ,440v cylindrical ...
Power Supply for non Microcontroller Based Test Fixture
Power Supply for non Microcontroller Based Test Fixture

... Q5 turns on when the output of U2 goes high indicating an over-current condition. Also in this circuit is C3. Together with R12 C3 sets the minimum signal spike the power supply will respond to. Under manual operation R12 times C3 (T = R x C) makes our over-current trigger a Fast-Blow or Slow-Blow. ...
GR 614-C Selective Amplifier, Manual
GR 614-C Selective Amplifier, Manual

... The Type 614-G Selective Ampli- output circuit of this tube is provided fier is designed fo~ producing with ten fixed tuned circuits; any one of and selecting the first ten harmonics of a which may be placed in circuit by means of distorted 1000- cycle voltage applied to the FREQUENCY switch . A sta ...
How to build the simplest FM transmitter
How to build the simplest FM transmitter

... Start to solder each components one by one. ...
Synchronous Generator
Synchronous Generator

... Types of Construction Use of Alternator Specification of Alternator ...
Powerpoint of Basic Electricity
Powerpoint of Basic Electricity

Ignition System Diagnosis and Service
Ignition System Diagnosis and Service

S6510P
S6510P

Resistor Inductor Capacitor Series Circuits
Resistor Inductor Capacitor Series Circuits

EVL6564-50WFLB
EVL6564-50WFLB

< 1 ... 300 301 302 303 304 305 306 307 308 ... 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