The Most Complete Reference and Guide for Radio Communications.The ARRL Handbook advances your pursuit of radio experimentation, discovery, and achievement. Each edition contains new and useful material to support Amateur Radio activity from the traditional short- and long-wave frequencies through microwaves! Amateur Radio enthusiasts - “hams” - often have been at the forefront of the incredible blaze of progress over the past century in wireless and electronics, leading to technology that has broadened our horizons and touched virtually all of our lives. In the days before the telephone and household electricity were commonplace and the Internet not yet conceived, hams pioneered personal communication. It was the first wireless social medium.