...Leadership Individual Paper: The Leadership of Hartley Peavey Hesston L. Johnson William Woods University Abstract During the beginning years of blues, a southern Mississippi man emerged to become the founder and CEO of one of the worlds leading musical product manufacturers. As a young man, Hartley Peavey desired to be a musician. With his father unable to afford a guitar, Hartley Peavey built his own and started what would become a long line of products that he would soon have to offer at Peavey Electronics. After some advice from a store manager, Peavey began to take off. Hartley built his legacy on a great product at a great price. Today, Peavey still operates as one of the only independently-owned music product companies and does so on a global scale. This result came through leadership styles such as: achievement leadership, participative leadership, consultative leadership, and entrepreneurial leadership. With strong leadership styles such as these, Hartley has led an organization that continues to be a leader in the industry by developing new products, implementing new practices and ideas to set the standard. His leadership creates an environment that fosters growth, teamwork and leads to a bright future for the Peavey team. The Leadership of Hartley Peavey The History and Birth of Peavey After 46 years of innovation, one man’s dream has become transformed into a world leading corporation in musical products. Today, Peavey Electronics...
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...twice the frequency of the highest audio frequency transmitted. The upper sideband is fc +FM where fc is the carrier frequency and FM is the modulation (audio) frequency. The lower sideband is fc-FM. The total band 10. What are some of the possible results of overmodulation? 19. Why is a high percentage of modulation desirable? 20. During 100 percent modulation, what percentage of the average output power is in the sidebands? (33.3%) 23. Describe two possible ways that a transistor can be used to generate an AM signal. 24. What is low-level modulation? 25. What is high-level modulation? 27. Why must some radio-frequency amplifiers be neutralized? 29. Define parasitic oscillation. Higher frequency self-oscillations in RF amplifiers. 30. How does self-oscillation occur? 32. What is the principal advantage of a class C amplifier? 35. Draw a block diagram of an AM transmitter. 36. What is the purpose of a buffer amplifier stage in a transmitter? 38. Draw a simple schematic diagram showing a method of coupling the radio-frequency output of the final power amplifier stage of a transmitter to an antenna. 39. Describe the functions of an antenna coupler. 41. What is a tune-up procedure? 43. Explain the advantages of the...
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...UNISONIC TECHNOLOGIES CO., LTD TDA2030 14W HI-FI AUDIO AMPLIFIER DESCRIPTION The UTC TDA2030 is a monolithic audio power amplifier integrated circuit. LINEAR INTEGRATED CIRCUIT FEATURES * Very low external component required. * High current output and high operating voltage. * Low harmonic and crossover distortion. * Built-in Over temperature protection. * Short circuit protection between all pins. * Safety Operating Area for output transistors. *Pb-free plating product number: TDA2030L ORDERING INFORMATION Ordering Number Normal Lead Free Plating TDA2030-TA5-T TDA2030L-TA5-T TDA2030-TB5-T TDA2030L-TB5-T Package TO-220-5 TO-220B Packing Tube Tube PIN CONFIGURATION PIN NO. 1 2 3 4 5 PIN NAME Non inverting input Inverting input -VS Output +VS www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd 1 of 13 QW-R107-004,D TDA2030 ABSOLUTE MAXIMUM RATINGS (Ta=25°C) LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATINGS UNIT 18 Supply Voltage Vs V Input Voltage VIN Vs V 15 Differential Input Voltage VI(DIFF) V Peak Output Current(internally limited) IOUT 3.5 A Total Power Dissipation at Tc=90°C PD 20 W Junction Temperature TJ -40~+150 °C Storage Temperature TSTG -40~+150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Vs PARAMETER...
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...Allyzzamer M. Tudio BSIT-2A Small Signal Amplifier A "small" signal in the context of "small signal" analysis relates to the linear approximation of a transistor model around it's operating point. In the presence of a "small" signal the output is a replica of the input except for a change in amplitude. In simple terms this means that a sine wave in gives you a sine wave out. That is the hallmark of a linear system. Large Signal Amplifier A large signal will however make the device operate in a non-linear fashion by clipping the output or introducing various kinds of distortion. This is why you cannot turn the volume on an amplifier all the way up to the maximum value because even small input signals will be reduced to unintelligible hash. Amplifier Circuit [pic] Amplifier Signal Block [pic] Example of schematic Diagram [pic] Devices/Components in an amplifier [pic] Define the following: Signal - A signal as referred to in communication systems, signal processing, and electrical engineering "is a function that conveys information about the behavior or attributes of some phenomenon". In the physical world, any quantity exhibiting variation in time or variation in space (such as an image) is potentially a signal that might provide information on the status of a physical system, or convey a message between observers, among other possibilities. The IEEE Transactions on Signal Processing states that the term "signal" includes audio, video, speech, image, communication, geophysical...
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...Anthony Rios 2/27/12 Composition 1 Vox Amplification: A History The Vox Amplifier Company are makers of guitar amplifiers that boast a history in rock and roll music, and with the invention of the electric guitar musicians were not only amplifying there guitar but exploring new frontiers. The Vox Empire and JMI (Jennings Musical Instruments) started with just two men by the names of Thomas Jennings and Dick Denney. Thomas Jennings was always interested radios and electronics as well as an amateur accordion player from there he took his interests and joined the British Army, where he was a part of the Royal Electrical and Mechanical Engineers. Sometime in 1942 he received a medical discharge and took a job at a munitions plant in Dartford Kent, England. While working at the plant he met a big band guitarist and fellow musician Dick Denny. Denney, who was also interested in electronics and radio technology, would befriend Jennings and the two would on occasion play together during air raids to keep the morale up. With the war still waging on in 1944 Jennings and Denney would go their separate ways and Jennings would start a small part time business selling second hand instruments and doing repairs. Around this time his business was growing fast and so was he needs to find a bigger commercial venue. It was 1946, the year after the war ended, is where he would open his first commercial premise mainly importing accordions and other musical instruments but also inventing new...
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...analysis, optimization, design and system level development of signal transformation between satellites or any two sources. Which work similarly to fibre optic links, except the beam is transmitted through free space. The carrier used for the transmission signal is typically generated by a laser diode. Two parallel beams are needed, one for transmission and one for reception. INTRUDUCTION: Laser Communication is one of the emerging areas of wireless communication system. Due to its low noise ratio makes its one of the well suited communication medium for exchange of information. Currently laser commutation is adopted in satellite communication for space research activities and due to its efficiency on low noise ratio, inexpensive, low power and its flexibility and its resistance to the radio interferences makes laser communication as one of research area in wireless communication. In this process, this paper comprises the one such application of laser communication for information exchange between any two devices. In Laser Communication the transmitter and receiver must require a line-of-sight conditions and Laser communications systems have the benefit of eliminating the need for broadcast rights and buried cables. The carrier used for the transmission signal is typically generated by a laser...
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...Basics of Running sound at FUMC Explains: a) About the system and how sound moves through it b) How to turn the system ON and OFF c) Controlling sound for Mics and other devices Basics of Sound and the Sound system: Soundwaves- energy moving air forwards and backwards Microphone- transfers sound into signal-microphone cablesoundboard Microphone stand- two main types boom (used for instrument players or speaking from podium)standard (used for speaking) Soundboard- Adjusts sound volume and toneamplifiersspeakers Wireless Receiver- captures signal from wireless micssoundboard Amplifiers- powers the speakers Speakers- reproduce sound from mics at much higher volume Turning the system ON: 1. Make sure you have the required components for what you are doing 2. Turn on Soundboard (red switch on surge protector behind soundboard) 3. Turn on Amps (located on stage behind Keyboard, switch is on the top in the rack) 4. Make sure Master fader is up (normally around 0) 5. Make sure channel faders are up The Soundboard On/off switch – must be switched ON BEFORE AMPS Channel – controls all sound for one microphone/CD Gain switch – adjusts amount of signal from microphone into the board EQ – adjusts tone of microphone sound FX/Monitor/AUX– sends (“routes”) sound to different locations Mute – shuts off sound of microphone PFL button – isolates microphone for meter Channel fader – adjusts microphone Channel Assignment – routes to...
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...good comedy to lighten my mood. When one is angry it can turn to an action movie to relieve or channel my anger. Then, if one feels a bit stressed, it has various exercise shows or even some calming music channels. And of course, my love of sports can be satisfied at anytime. From football to tennis, I can have it all at my finger tips. Having cable offers me hundreds of comforting options. And just like that, the television just knows what one needs at that moment and can do so with no talking and best of all, no judging. In this world things tend to be crazy and unpredictable and most people desire to have is a little control over something. I get that with my television. When I get the television remote it gives me a sense of power, even if just temporarily. One can watch whatever their heart desires and change the channel whenever one wants. My TV is even voice activated if one chooses to...
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...RKS Guitars Case Study RKS Design seeks to create or re-create products for which users will engage in more than mere consumption, but rather find senses of empowerment prompted by the use of their designs. They believe that the only way to change and deepen the consumer-product interaction is by entering the consumers’ psyche and understanding their minds. According to their Electric Guitar PA Map, the market’s most popular guitars are shown to be merely fairly interactive, with functions entailing moderate, albeit relative, engagement on the consumer’s part. It is here that we can determine RKS’ desired positioning. Indeed, in order to stand out from the current homogenized market, their aim was to design a deeply engaging, alluring and enticing guitar, technically superior and more emotionally engaging, epitomizing senses of freedom and empowerment. The RKS Guitar’s design is not only ingenious and eye-catching, but is also sonically captivating, thus creating unique meaning and value for its user. As consumers were divided into distinct segments (children and their parents, professional and aspiring players, collectors, institutions), we believe RKS’ target segments should range between collectors and professional players. Indeed, novices and hobbyists do not need nor expect the most performing guitar, but rather a more basic one. On the other hand, 30-50 years old (or more) professionals and aficionados are much more inclined to find an innovative design appealing...
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...“Class A Power Amplifiers” ITT Technical Institute• 3rd Quarter/December2014 •3-6-2015 Introduction The common-emitter (CE) amplifier provides high voltage gain with moderate input resistance whereas the common collector (CC) amplifier provides current gain and low output resistance. Combining the two amplifiers gives the advantages of each, allowing the amplifier to drive a relatively low resistance load such as a speaker. In all amplifiers, some power from the supply is wasted – that is, it does not show up as signal power in the load. In class A power amplifiers, the transistor is biased on at all times, causing power to be dissipated in the transistor, even when no signal is present. Because of this, class A amplifiers are not as efficient as class B designs. For low power applications, this reduced efficiency is not a major problem. Further, the power dissipated in the transistor is highest when no signal is present, so it is simple to compute the worst case power dissipated in the transistor − it is simply VCEQICQ. In this experiment, you will combine a CE and CC amplifier to form an amplifier that will be used for driving a small speaker. Most speakers are low resistance devices, requiring the driving amplifier to have a low output resistance. Because the CE amplifier typically has relatively high output resistance, a Darlington CC amplifier is selected to minimize the loading effect. In the For Further Investigation section, you can complete the amplifier by adding...
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...(a)____________(b)____________(c)____________ | 2 | Determine the attenuation of an RC lag network with fc = 12 kHz for each of the following frequencies. (a) 1 kHz (b) 5 kHz (c) 12 kHz (d) 20 kHz (e) 100 kHz | (a)____________(b)____________(c)____________(d)____________(e)____________ | 3 | Determine the phase shift through the network at a frequency of 2 kHz: | | 4 | Determine the phase shift through the network at a frequency of 2 kHz: | | 5 | Determine the phase shift through the network at a frequency of 2 kHz: | | 6 | A certain op-amp has three internal amplifier stages with midrange gains of 30dB, 40dB, and 20dB. Each stage also has a critical frequency associated with it as follows: fc1= 600Hz, fc2 =50kHz, and fc3 = 200kHz. (a) What is the midrange open-loop gain of the op-amp, expressed in dB? (b) What is the total phase shift through the amplifier, including inversion, when the signal is 10 kHz? | | 7 | A certain amplifier has an open-loop gain in midrange of 180,000 and an open-loop critical frequency of 1500 Hz. If the attenuation of the feedback path is 0.015, what is...
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...Devin DeCavalcanti Speech January 14, 2015 I am here today to talk to you about someone with a very unique name, his name is Royal. When I first heard his name a few things popped into my mind, the royal family, the Kansas City Royals, basically he sounds like he could be famous. When you ask royal what he likes to do his story gets even better because he plays the electric guitar. He does not play in a band but he has covered for local bands whose members have been out sick. Royal says he enjoys playing with a band because of all the energy and he tends to pick up on their music pretty fast. Maybe one day he could have his own band named after him. Royal likes to play just about any kind of music but the music he enjoys listening to the music is R&B and soul. I like talking to him about playing the guitar because as a kid I always wanted to learn how to play, but I never accomplished that goal. Now that we have talked about what he likes to do I would like to go back and talk about his name because it really caught my attention. The word royal means having the status of a king, queen or a member of their family. If my name was Royal I would use that to my advantage and make sure everyone knew it. I never found out why his parents named him Royal but in my opinion they seem to have picked out that right name for him. With his name being one of kind I am sure he gets compliments all the time. When I first met him and asked what his name was I had to say it back to him...
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...Section F2: Classes of Amplifiers As mentioned in the introduction, an important role of the final stage of an amplification system is to ensure a low output resistance so that the output signal may be delivered to a low resistance load without loss of gain. Many times, the gain stages provide the output stage with signals that are large enough that the small-signal transistor model no longer applies (or must be used with caution). However, it is still of paramount importance that linearity be preserved – that is, signal distortion must be kept to an absolute minimum. Another output stage requirement is that it delivers the required power to the load efficiently. This means that the power dissipated in output stage transistors must be kept to an absolute minimum, both to ensure maximum power delivered to the load and, probably more importantly, to ensure that the transistor temperature remain below specified levels. Although MOS power transistors (to be discussed later this semester) offer significant advantages over BJTs such as the reduction or elimination of certain breakdown mechanisms found in BJTs, the reduction of the large drive currents required for BJT power amplifiers and a generally higher speed of operation, we will not address the MOSFET implementation this semester due to increased the device complexity required for high power applications. Amplification stages are classified according to the characteristics of the collector (output) current waveform with...
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...[BUILDING A BATTERY POWERED GUITAR AMPLIFIER] [Gray GS 1140] Darin Frank Darin Frank Gray GS1140 Building A Battery Powered Guitar Amp Intro: Since the invention of the guitar amplifier, it has operated on AC power. Since its creation in the early 1900’s, amplifiers have come a long way. We now have multiple name brand amplifiers, as well as boutique amplifier building companies. These all use power cords that allow them to function, and produce sound. So what if I told you the way you think of guitar amplifiers might be about to change? What would you say? Background: Over the past century guitar amplifiers have gone through multiple changes. First there were vacuum tube amplifiers dating back to the early 1900’s made by Gibson and Redenbacher, to the transistor/ Solid State amplifier created in the 1960’s. Then the world renowned Jim Marshall combined the two amplifier types in 1991, and the era of the Valve State amplifier was born. These have evolved into some of the best products imaginable, and have become one of the most controversial debates among musicians since the creation of the guitar amplifier. On January 14th, 2010 a brand new era of professional guitar amplifiers were introduced into the world of music. The first lithium battery powered 60watt Grid C-1 professional vacuum tube amplifier was viewed by the general population at Namm 2010. This amplifier is equipped with many great features such as: Tubes: | 2 Nos U.S.-made 1u4 mini...
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...Summary of Theory We will be combining a common-emitter (CE) amplifier with a common collector (CC) amplifier. This will allow us to have a high voltage gain with moderate input resistance and current gain with low output resistance. Together, the amplifiers will make a speaker with a low resistance load emit noises of different pitches at different frequencies. As with all amplifiers, there will be a small amount of power from the supply that will be wasted. The amplifier we will be building is a class A power amplifier. Therefore, the transistor is biased on at all times. This means that when no signal is present, the power in the transistor will be dissipated. Class B designs are more efficient than the class A design that we will be building. The reduced efficiency will not be a problem though since we are using a low power application. We can determine the worst case power dissipation in the transistor by the formula VCEQICQ. This can be done because when no signal is present, the power dissipation is highest in the transistor. A CE and a CC amplifier will be combined, in this experiment, to make an amplifier that will drive a small speaker. The driving amplifier will need to have a low output resistance, since the speaker is a low resistance device. A CE amplifier usually has a high output resistance. Because of this, a Darlington CC amplifier is used to keep the loading effect to a minimum. All dc parameters will be computed and then measured first. After the dc conditions...
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