From author:
"I have written this book with help from my good friend Val Gardner and my wife Gwen MOGWA who helped me to compose, edit and prepare for publishing. I have self published this book and funded it by choice so I do apologise for any mistakes or errors you find and I wil l be pleased to know about any.
It is intended to help with the understanding of amplifiers and help those who intend to build or repair HF, VHF and UHF amplifiers. The choice of valves is huge and is still the most economical way of generating a stronger signal from your radio station...
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Are you an Amateur Radio enthusiast? Or are you looking to get into this amazing hobby because you've heard about some of the interesting things you can do like tracking satellites, communicating in Morse code or perhaps playing a game over the air, and you want to try them out?
If you answered “YES!” then you’ll want to download Hamshack Raspberry Pi: Learn How To Use Raspberry Pi For Amateur Radio Activities And 3 DIY Projects
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В книге собраны наиболее известные и эффективные схемные решения повышения выходной мощности усилителей, а соотношения для их расчета даны без выводов. Ссылки на литературу позволяют найти, при необходимости, доказательства справедливости приведенных соотношений.
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Ham radio, or amateur radio, is a way to talk with people around the world in real-time, or to send email without any sort of internet connection. It provides a way to keep in touch with friends and family, whether they are across town or across the country. It is also a very important emergency communication system. When cell phones, landlines, the internet, and other systems are down or overloaded, Amateur Radio still gets the message through. Radio amateurs, often called "hams," enjoy radio technology as a hobby, but are often called upon to provide vital service when regular communications systems fail.
Ham Radio For Dummies is your guide to everything there is to know about ham radio. Plus, this updated edition provides new and additional information on digital mode operating, as well as use of amateur radio in student science and new operating events.
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This book/course is for all those who are willing to build exciting projects with Arduino. You actually do not need to know the Arduino platform beforehand as all projects will be explained step by step with clear instructions.If you want to work with sensors shields and digital electronics, so this book also is for you.Every software and hardware components you will need along the way will be explained as well.
Also this book will take you into the internet of things field. You will create a project using the Arduino Ethernet shield at the end of the book.If you prefer you can just read the description of every project, but I really recommend doing the projects yourself to really learn the Arduino programming.At the beginning of each chapter you will find the components list that you will need for the project with step-by-step explanations.At the end of each chapter there will be exercises/quizzes in order to make the learning process easy, fast and enjoyable.
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This new book by John Fielding, ZS5JF, is for everyone who uses – or is considering using – an HF or VHF linear amplifier. While some amateurs may be of the opinion that valves are an obsolete technology and semiconductors are a better way, John Fielding very definitely thinks otherwise! After reading this book you will be under no illusions that, in his opinion, valves are far superior to semiconductor devices for most linear amplifier applications. As he says, “When you need real power and very good linearity, a valve is very hard to beat.”
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Книга "The VHF/UHF DX Book" была написана в начале середины 1990-х годов командой опытных УКВ/КВ DX-ers и разработчиков оборудования, чтобы передать своё знание и стимулировать дальнейшее развитие УКВ/КВ DX-ers.
Для того времени это была актуальная и нужная книга, но поскольку мы вошли в цифровой век, стоимость книги в печатном виде была высокой и она была "потеряна" для следующих поколений радиолюбителей.
Было принято решение сохранить книгу в цифровом формате, и сейчас это точная копия второго издания датированного 1995 годом была выпущена с разрешения владельца авторского права TRPublishing и его владельца Trevor Preece G3TRP.
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Требуемые уровни выходной мощности усилителей радиопередающих устройств превышают возможности современной элементной базы. Поэтому при создании радиопередающих устройств используются различные методы повышения выходной мощности, основанные на применении схем сложения мощностей, отдаваемых несколькими транзисторами, и реализации оптимальных условий работы активного элемента. Прикрепления: |
A Guide to Design, Installation and Construction.
With years of experience as a professional tower climber, Don Daso, K4ZA, leads you through designing and building your own antenna tower. You'll learn the skills, tools, climbing techniques, and safety measures necessary to improve your antenna system.
Antenna Towers for Radio Amateurs will guide you through the installation process in its entirety, from selecting a tower, digging the base, pouring concrete, and installing the tower, antenna and accessories. Included are tips for working with rope and pulleys, guy wires and associated hardware. You’ll also learn proper procedures for taking down existing towers, conducting inspections and performing maintenance. Whether you aspire to climb and work on an antenna tower yourself, or hire a professional, this is your guide to success!
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QST’s monthly “Product Review” column has long been the most-read section of the magazine. That’s not surprising, as most radio amateurs are interested in reading about the latest station equipment, and product review testing helps operators make informed decisions based on their needs and desired performance.
Amateur Radio Transceiver Performance Testing explains in detail the performance data tables from QST Product Reviews. It discusses how published laboratory data relates to actual performance, how each major test is performed, the significance of each test, and what the numbers mean. After reading this book, you’ll gain a better understanding of the extensive testing ARRL performs, learn the technical terms and parameters presented in Product Review, and develop the capability to reach your own conclusion about which HF transceiver is best for you.
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