ARRL Handbook 2022 The ARRL Handbook for Radio Communications is your complete guide to radio experimentation, discovery, and innovation. It is the Handbook -- written by radio amateurs for everyone with a desire to advance the pursuit of wireless technology. Key Topics Radio electronics theory and principles Circuit design and equipment Radio signal transmission and propagation Digital and analog modulation and protocols Antennas and transmission lines Construction practices New Projects and Content: 3D printing for ham radio construction Downloadable 3D printing projects and articles Battery selection for portable operation Downloadable article — using SDR for RFI tracking Solid-state amplifier linearity Safe practices for antenna and tower work Downloadable crystal test oscillator Updated CAD software from Tonnesoft Softcover: 1280 pages.