Despite the growth of the Internet, ham radio is still a popular hobby. How does it work, and how is it still relevant in the digital era? TunnelBear message: TunnelBear is the easy-to-use VPN app for mobile and desktop. Visit http://tunnelbear.com/linus to try it free and save 10% when you sign up for unlimited TunnelBear data. Follow: http://twitter.com/linustech Join the community: http://linustechtips.com/ License for images used: https://creativecommons.org/licenses/by/2.5/legalcode