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The ARRL Operating Manual for Radio Amateurs -- Everything for the active ham radio operator! Explore new activities, learn new skills, find new references and more.

Understanding Basic Electronics -- This book provides a stepping-stone to learning electronics. With the foundation it helps you create, you'll be ready to learn more advanced concepts.

Basic Antennas -- An introduction to antennas--basic concepts, practical designs, and easy-to-build antennas!

Basic Radio -- FINALLY--an introduction to radio FOR EVERYONE!--what it does and how it does it.

Online Course: The ARRL Ham Radio License Course -- Prepare for your first Amateur Radio license!

Feedback - April, 2003 QST

In "The Doctor is IN" [Mar 2003, p 56], the photos captions are missing. The top left photo is Figure 2A, the top right is Figure 2B, the bottom left is Figure 3A and the bottom right is Figure 3B. The captions should read as follows:

Figure 2A----Modulation (square-wave) that results from an unfiltered key line.

Figure 2B----A shaped and filtered square-wave keying signal.

Figure 3A----Key clicks caused by unfiltered keying result in a wide noise spectrum.

Figure 3B----A filtered keying line reduces these spurious signals noticeably.

In the Hints and Kinks column [Mar 2003, p 67] the caption for Figure 2 should read "A pair of finished termination resistors."