This website uses cookies to ensure you have the best experience. Learn more

Electrical Amplification Essay

1930 words - 8 pages

Electrical Amplification
The creation and advancement of the electric amplifier began in 1906 with the invention of the triode, a form of electric amplification containing three active electrodes of which vacuum tubes are a variety, by De Forest (Leach, 1995). This invention became the primary focus of the amplification industry, resulting in the discovery of stable operating vacuum tubes by Langmuir of General Electric in 1913. Consequently, the Japanese established a vacuum tube laboratory in 1914 and created a prototype high-quality vacuum tube in 1916. With the beginning of radio broadcasts in Japan, in 1925, vacuum tube technology quickly spread to England and North America (Okamura, 1994). The electric pickup, a device that translates the disturbance in a magnet field into and electric signal, became practical enough for production in 1931, thus creating a need for electrical amplification. These first amplifiers, made by the company Electro String, had an output of approximately ten watts and utilized the same technologies as early radios, specifically vacuum tubes. The growing popularity of electrical amplification quickly caused demand for louder amplification. Leo Fender filled this need in 1949 with the first 50-watt amplifiers, which is still the standard wattage today. The late 1960s saw the next leap in amplifier technology in the invention of 100-watt amplifiers, which were loud enough for large arena-sized shows, by Jim Marshall (Hamm, 1972). In the 1970s, solid-state technology amplifiers replaced tube amplifier technology. These amplifiers were cheap and physically durable (Horowitz & Hill, 1989).
An Introduction to Electrical Amplification
At the most basic level, an electric amplifier is a device that increases the output of a signal or current beyond that of the original output. The addition of a power supply, a wall outlet for example, increases the output, matching the power supply’s additional output to that of the original, but with greater amplitude (Leach, 1995). The qualities of an electrical amplifier are broken into categories: gain, bandwidth, efficiency, and linearity. Gain is the ratio of output to input power in decibels. Bandwidth is the range of frequencies for which the amplifier functions correctly, standardized around a difference of less than one decibel from the intended. Efficiency is the percentage of the power source successfully added to the output (McCorquodale, n.d.). Although there are other varieties of electrical amplification, the only form functional for the amplification of electrical signals to pure audio is nonlinear amplification via vacuum tubes and solid-state technologies. Nonlinear amplifiers are those whose components follow nonlinear power laws and as a result generate distortion (Liptak, 2005).
Methods of Electrical Amplification
Vacuum Tubes
Vacuum tubes, or thermionic valves, are triodes, possessing three active electrodes, and contain a cathode, grid, and...

Find Another Essay On Electrical Amplification

Physics of the Turntable Essay

1251 words - 5 pages modern turntable basically works like this: A platter (on which the record sits) is spun by a drive system. The drive system spins the record at specific revolutions per minute (RPM). A pickup system in the form of a stylus and cartridge converts the audio on the record into an electrical signal. A tracking system in the form of a mechanical arm connects the cartridge to the turntable and also enables the pickup system to track the record grooves

The Use of Light as a Communication Media: China Great Wall

860 words - 4 pages The use of light as a communication media used in China Great Wall distance more than 7300 km with in 1 hour to sent signal from one tower to another. In the late 20th century optical communication took back in to the seat for its advantages over coaxial transport and other electrical communication system. In 1966, Kaw and Hockman proposed the idea of using optical fiber light wave communication and their prediction was data loss 20dB/km [12

Physics of Electric Guitars

1330 words - 5 pages ). Background Inventors have been playing with the idea of electrically powered musical instruments since the 1800s, but "the first attempts at an amplified instrument did not come until the development of electrical amplification by the radio industry in the 1920s." One pioneer of the electric guitar, Lloyd Loar, worked as an engineer at the Gibson Guitar Company. In 1924, he developed and electric pick-up to amplify the viola and the

The Introduction of the Electric Guitar

821 words - 4 pages According to the Smithsonian Institute, “electronic amplification is one of the most successful innovations brought around at the end of the 1930s.” The 1920s had a rise in the popularity of dance music, and the recording industry was getting started. This was also the start of the Big Band Era ( Guitar makers started experimenting to develop a new, louder, guitar. Electrical amplification was developed by the radio

Interforometry-Based Optical Fibe Microphone Using Graphene Diaphragm

1216 words - 5 pages MAE 546 Final Project Interferometry-based optical fiber microphone using graphene diaphragm Zhiting Wang Introduction of conventional microphones and optical fiber microphone Microphone is a kind of device which includes an acoustic-to-electric sensor that converts sound into electrical signals. Conventional microphones use the mechanism of electromagnetic induction (dynamic microphone) or capacitance change (condenser microphone

Radios, and how they work

3090 words - 12 pages developed at the detector and used to reduce automatically the gain, or amplification, of the IF amplifiers.The prime advantage of FM, in addition to its fidelity, is its immunity to electrical noise. Lightning storms superimpose noise on an AM signal by increasing the amplitude of the signal. This effect shows up in a receiver as a crackling noise. An FM receiver, because it decodes only the frequency variations, has a limiter circuit that restricts

DNA finger Printing Facts and progress of DNA finger printing. Facts of all DNA finger printing up to 2003

660 words - 3 pages containing DNA are collected and purified, The cells are broken open and their DNA is separated, if only a small amount of DNA is available it may be duplicated by a process called amplification. The DNA is treated with proteins (called restriction enzymes) that cut it at specific locations to provide DNA fragments of different lengths, since each persons DNA sequence is unique the pattern of DNA varies among every individual. Using an electrical


548 words - 2 pages further analysis. DNA from a crime scene can be matched to a suspect, indicating that the suspect was indeed present at the scene of the crime.PCR (polymerase chain reaction) is used to generate lots of DNA from a small sample called amplification. This DNA is then used to create DNA fingerprints.Taq polymerases (enzymes that are originally purified from a bacterium and stable at very high temperature), primers (help amplify polymorphic regions of the

Analysis of Laser Technology

1746 words - 7 pages revolutionary use in the fields of fiber optics communication and medicine are also worth noting. A laser is a device that produces a very narrow, powerful beam of light. The term laser is an acronym for Light Amplification by Stimulated Emission of Radiation (Hecht 1982). In addition to being intense and narrow, laser beams are coherent, meaning that all of the light waves come out all lined up with one another and are of only one

The Secret Life of Sound Perception

2453 words - 10 pages (“Loudspeaker”). Aided with the new amplification technology C.W. Rice and E.W. Kelley were able to invent “the first ‘modern’ loudspeaker” which operates by “convert[ing] electrical signals into audible sound” (“Loudspeaker”). Early loudspeakers were not perfect and amplified both the original signal and elements of distortion that were caused by the speaker itself. To correct this Harold Black created a way to reduce distortion by using three

Magnetic Fuel

823 words - 4 pages course, true perpetual motion cannot be achieved, but reaching 80%-90% is not impossible. The magnets can be started with some jolt of energy and as a reward, it can provide efficient non-resistant kinetic motion lasting up to 30 years! The kinetic energy can then be converted into electrical energy to fuel cars, planes, factories, etc (Welch 1). Using kinetic energy and magnetic fields that control the motion of electrons a long lasting and dynamic

Similar Essays

The Physics Of A Guitar Essay

1264 words - 5 pages Introduction: The guitar is a typical string instrument, whose physics are similar to many other string instruments. The main parts consist of the body, the neck, the bridge, the tuning pegs, the sound hole, and the strings. An electric guitar lacks the sound hole and instead relies on an amp for amplification. The physics of a guitar involves sound waves, how they are amplified, and how they travel. Strings: The vibration of the strings of

How Guitars Make Sound Essay

1657 words - 7 pages Amplification is very common in the musical world as it increases the volume in which an instrument is played. An electronic device is used for increasing the amplitude of the instruments electronic signals, used mainly in sound reproduction. As shown in diagram 4 it is the same as how it would work with a musical instrument. The sound waves from the guitar is formed into electrical current were the amplifier modifies the

How The Ears Hear By Benny

1953 words - 8 pages acts as a piston, creating waves in the inner-ear fluid to represent the air-pressure fluctuations of the sound wave. The ossicles amplify the force from the eardrum in two ways. The main amplification comes from the size difference between the eardrum and the stirrup. The eardrum has a surface area of approximately 55 square millimeters, while the faceplate of the stapes has a surface area of about 3.2 square millimeters. Sound waves apply force

Types Of Inverters For Generated Solar Power With Grid Power

1078 words - 5 pages string with voltage amplification by DC-DC converter or a line frequency transformer, which increases total area. However, in a common scenario of partial shading, MPP tracking may still not be sufficient to achieve a certain efficiency requirement. Fig-2-String inverters 3- Micro-Inverters The micro-inverter solution, also called AC module, shown in Fig. 3, is the integration of PV and inverter into one electrical device. With only