• 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
AN-776 20 Watt Simple Switcher Forward Converter (Rev. A)
AN-776 20 Watt Simple Switcher Forward Converter (Rev. A)

... TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguar ...
Aalborg Universitet
Aalborg Universitet

IE2514631473
IE2514631473

HX460 with External Pulse Width Modulated Drive
HX460 with External Pulse Width Modulated Drive

the Medium Voltage Controllable Fuse Brochure
the Medium Voltage Controllable Fuse Brochure

... the low-voltage side of a medium voltage transformer. The industry’s first fuse to provide normal short-circuit and overload protection while having the capability to open on command, this fuse is a cost effective arc flash solution with minimal installation downtime. ...
LABORATORY EXPERIMENT
LABORATORY EXPERIMENT

Capacitor and inductors
Capacitor and inductors

... In both digital and analog electronic circuits a capacitor is a fundamental element. It enables the filtering of signals and it provides a fundamental memory element. The capacitor is an element that stores energy in an electric field. The circuit symbol and associated electrical variables for the c ...
2 x 40 W/2 Ohm stereo BTL car radio power amplifier with diagnostic
2 x 40 W/2 Ohm stereo BTL car radio power amplifier with diagnostic

... packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is ...
MAX4100/MAX4101 500MHz, Low-Power Op
MAX4100/MAX4101 500MHz, Low-Power Op

Grounding Transformer
Grounding Transformer

... A Grounding Transformer is used to provide a physical neutral for a power transformer with a delta connected downside. The Grounding Transformers neutral point has low impedance and is suitable for different grounding systems such as solid earthing, NER earthing (resistor) and resonance earthing (Ar ...
AP3983E - Diodes Incorporated
AP3983E - Diodes Incorporated

... MOSFET, regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode ...
MAX7057 300MHz to 450MHz Frequency-Programmable ASK/FSK Transmitter General Description
MAX7057 300MHz to 450MHz Frequency-Programmable ASK/FSK Transmitter General Description

Capacitor 2x Pulse Length Experiment
Capacitor 2x Pulse Length Experiment

... To show how a capacitor charges or discharges in this case we know the Z of the capacitor to be 75 ohms so now we change the termination at each end to 150 ohms and just show the voltage /time at Point ‘B’ or ‘D’. The 2 traces show top one is X=20 ns/div and Y as before 2v/div Zero or ground is 1 d ...
AN-6075 Compact Green-Mode Adapter Using FSQ500L for Low Cost 1. Introduction www.fairchildsemi.com
AN-6075 Compact Green-Mode Adapter Using FSQ500L for Low Cost 1. Introduction www.fairchildsemi.com

... Two suggestions with different pro and cons for ground connections are recommended. ...
a CMOS Quad Sample-and-Hold Amplifier SMP04*
a CMOS Quad Sample-and-Hold Amplifier SMP04*

lecture 1 power quality
lecture 1 power quality

... Caused by waveforms that have frequency components that are not integral multiples of the fundamental frequency, 50Hz. The effects of inter-harmonics are light flicker, audible noise in tv sets, radios and audio equipment, and vibration in rotating induction machines. ...
AlexanderCh06finalR1
AlexanderCh06finalR1

High Frequency Induction Welding
High Frequency Induction Welding

012381387AY
012381387AY

pnm-31 voltage relay
pnm-31 voltage relay

... ● Mounted on TH 35 rail. ...
Mesh Analysis
Mesh Analysis

... Steps in Mesh Analysis 1. Identify all of the meshes in the circuit 2. Label the currents flowing in each mesh 3. Label the voltage across each component in the circuit 4. Write the voltage loop equations using Kirchoff’s Voltage Law. 5. Use Ohm’s Law to relate the voltage drops across each componen ...
Powerful Siren - Hobbielektronika
Powerful Siren - Hobbielektronika

... ( ) Placing components correctly on a Printed circuit board. ( ) Soldering components neatly to a PC board. ( ) Holding components while soldering so that they do not get too hot. ( ) Understanding the concept of resistance - high resistance and low resistance. ( ) Understanding the concept that a c ...
primary voltage side
primary voltage side

... i) Eliminate transformer T2 by referring the load over to the transmission’s line voltage level. ii) Eliminate transformer T1 by referring the transmission line’s elements and the equivalent load at the transmission line’s voltage over to the source side. The value of the load’s impedance when refle ...
Physics 3 Spring 1989 Lab 1 - Capacitance Measurements Theory
Physics 3 Spring 1989 Lab 1 - Capacitance Measurements Theory

... a. The electrometer is a very sensitive instrument. To prevent damage to its components, do not turn it on without a capacitor connected across its terminals. The power switch is a toggle switch located to the right of the voltage scale. The electrometer is on when the switch is in the up position. ...
Tesla Coil Impedance
Tesla Coil Impedance

... in C1. As time increases, energy is shared among C1, L1 , C2, L2 , and M . The total energy in the circuit decreases with time because of losses in the resistances R1 and R2. There are four energy storage devices so a fourth order differential equation must be solved. The initial conditions are some ...
< 1 ... 189 190 191 192 193 194 195 196 197 ... 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