Pinterest. Beavis Audio-Tech Pages. CircuitLab - online schematic editor & circuit simulator. U.S.Navy NEETS program. Lessons In Electric Circuits. A free series of textbooks on the subjects of electricity and electronics Copyright (C) 2000-2015, Tony R. Kuphaldt These books and all related files are published under the terms and conditions of the Design Science License. These terms and conditions allow for free copying, distribution, and/or modification of this document by the general public. A copy of the Design Science License is included at the end of each book volume. As an open and collaboratively developed text, this book is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Access individual volumes, I through VI: Edition numbers reflect major structural changes to a book volume such as the addition of new chapters, the substantial expansion of existing chapters, or a change in markup language (source code formatting).
"Last revised" dates reflect non-trivial changes only. Note to instructors: Build your own LCD Video Projector. Here are some other LCD projector plans recently mailed to me by somebody, I scanned them in for you: By the time you are done going through all this information, you should be able to build a video projector that will work as well as any one of the brand name LCD video projectors that cost hundreds to thousands of dollars, for less than $300.
To get started you need to know how these projectors work. The Cable Guide: Know Your Computer and TV Wires. Basic BJT Amplifier Configurations. Common Base Configuration Here the base is the common terminal.
Used frequently for RF applications, this stage has the following properties. Low input impedance, high output impedance, unity (or less) current gain and high voltage gain.Common Collector Configuration This last configuration is also more commonly known as the emitter follower. This is because the input signal applied at the base is "followed" quite closely at the emitter with a voltage gain close to unity. The properties are a high input impedance, a very low output impedance, a unity (or less) voltage gain and a high current gain. Forum - Main Forums : Recording Techniques. That's not what I was saying.
The classic old designs were designed they way they were for a myriad of perfectly good technical reasons at the time, and to a large degree that's why they sound as they do. The point I was making is that criticising those designs now, with the benefit of modern technology and design evolutions, is pointless. We can now design things with wider bandwidths, lower disortion, better power efficiency and so on... but we're starting from a different place and approach the problem from a different angle. The Neve 1073 was designed to be the cleanest, widest bandwidth, highest headroom and quietest preamp available in its day.
Today we would start in a different place and design something that measured considerably better. Even Mr Rupert Neve himself designs his current preamps using entirely different technology and achieves significantly better performance than those 1960/1970s designs. Hugh --------------------Technical Editor, Sound On Sound. Troubleshooting and Repair of Consumer Electronic Equipment. Including: Test Equipment, Supplies, Parts, Incredibly Handy Widgets(tm), Sources of Information, and Where to Find Broken Stuff Version 2.47 (21-Feb-12) Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: This notice is included in its entirety at the beginning.
There is no charge except to cover the costs of copying. Table of Contents Preface Author and Copyright Introduction Getting Into Troubleshooting Comments on How to Learn Repair THE Question: To Repair or Not to Repair If You Decide That You Don't Want to Bother Repairing Something Smoking Around Electronic Equipment General Safety Considerations Basic Troubleshooting Some of My Rules of Troubleshooting Some Quick Tips or Rules of Thumb On-Line Tech-Tips Databases. Theory and Practice. Audio Filters - Theory and Practice by Ethan Winer This article first appeared in the August 1981 issue of Recording-engineer/producer magazine.
In a previous article I explained that capacitors are essentially frequency-dependant resistors. Welcome to Mr. Patchbay. DiyAudio. Filter Design - Circuit Sage. Beavis Audio Research. CDMA Tutorial. CDMA is interference limited multiple access system.
Because all users transmit on the same frequency, internal interference generated by the system is the most significant factor in determining system capacity and call quality. The transmit power for each user must be reduced to limit interference, however, the power should be enough to maintain the required Eb/No (signal to noise ratio) for a satisfactory call quality. Maximum capacity is achieved when Eb/No of every user is at the minimum level needed for the acceptable channel performance. As the MS moves around, the RF environment continuously changes due to fast and slow fading, external interference, shadowing , and other factors. The aim of the dynamic power control is to limit transmitted power on both the links while maintaining link quality under all conditions. Handover occurs when a call has to be passed from one cell to another as the user moves between cells.