Copyright © 2014 by The American Radio Relay League, Inc Copyright secured under the Pan-American Convention All rights reserved. No part of this work may be reproduced in any form except by written permission of the publisher. All rights of translation are reserved. Printed in USA Quedan reservados todos los derechos ISBN: 978-1-62595-013-0 Third Edition First Printing Feedback: We’re interested in hearing your comments on this book and what you’d like to see in future editions. Please email comments to us at