The origins of amateur radio can be traced to the late 19th century, but amateur radio as practiced today began in the early 20th century. The First Annual Official Wireless Blue Book of the … See more

The many facets of amateur radio attract practitioners with a wide range of interests. Many amateurs begin with a fascination with radio … See more

Amateurs use a variety of voice, text, image, and data communications modes over radio. Generally new modes can be tested in the amateur radio service, although national … See more

• Bergquist, Carl J. (May 2001). Ham Radio Operator's Guide (2nd ed.). Indianapolis: Prompt Publications. ISBN 0-7906-1238-0 See more

Radio transmission permits are closely controlled by nations' governments because radio waves propagate beyond national boundaries, … See more

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