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ARRL - Antenna Towers for Radio Amateurs
"Antenna Towers for Radio Amateurs" from ARRL will walk you through the tower installation process. These books will review the process completely, from choosing the right tower to mixing and pouring concrete, putting in a base, and finally erecting the tower, antennas, and accessories. Having many years of experience as a tower professional, Don Daso, K4ZA, methodically directs you in the design and construction of your own amateur radio tower. You'll learn the necessary expertise, tool requirements, climbing practices, and personal safety procedures necessary to allow for the construction of an improved antenna system. Mr. Daso has incorporated advice for using rope and pulleys, guy lines, and various pieces of required hardware. There are sections on proper procedures for removing existing towers, performing inspections, and carrying out maintenance. Whether you want to install an antenna tower yourself, or engage professional talent to do the work for you, "Antenna Towers for Radio Amateurs" will help you tower above the rest!
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$29.95
RSGB's Power Supplies Explained
A power supply is often taken for granted by radio amateurs, as for many it is simply the box, that at the flick of a switch, provides stable DC voltage. A modern power supply is much more though, combining theory that dates back to the nineteenth century incorporating the latest techniques in digital control, with a wealth of electronics practice in between. The RSGB's Power Supplies Explained sets out to do exactly this - explain in understandable terms what that little box is doing, right through to designing your own custom-built power supply. Some believe there is a little magic in power supply design. Beginners may be especially wary of the challenging mixture of digital, analog, magnetics and control loops, with cooling, EMC and safety to contend with as well. While many books deal with the theory in depth, they often give little guidance on the practical aspects of achieving working designs. Power Supplies Explained is different. This book describes how circuits are chosen for the application and how circuits are designed including their inductors and transformers. Calculations are outlined in a simple way so that the reader can use them as a basis for their own designs. Readers will find chapters that include descriptions of 'linear' supplies and a wide range of 'switched-mode' types from simple buck converters to the latest off-line high-efficiency types. Practical examples are based around typical radio amateur requirements and in many cases are versions of commercial products that the author has successfully designed. There are also chapters on magnetics theory, control loops, EMC, practical construction techniques, test equipment and much more. High voltage power supplies are included with comprehensive guidance on safety.
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$24.95