Ham Radio has seen a lot of interest during the lockdown, both because it's a fantastic and extremely diverse technical and social hobby that you can spend endl

Ham Radio has seen a lot of interest during the lockdown, both because it's a fantastic and extremely diverse technical and social hobby that you can spend endless time on in isolation, but also because (especially in the US) ham radio is now only thought of as a hobby but as a public service providing emergency communication. Many radio amateurs who were licensed but inactive for a long time recently came back into the hobby, causing a spike in activity. To those who think that amateur radio is a bunch of guys sitting in front of glowing tube radios, hammering away on their Morse keys (which still exists, and is great fun, too!), nowadays radio amateurs have a multitude of sub-hobbies which include homebrewing equipment of all sorts, ARDF ("fox hunting"), satellite communication (with lots of LEO satellites and the QO-100 geostationary satellite available), moon bounce operation, digital communication schemes that work with extremely weak signals, software defined radio experimentation, contesting (competitive radio sport events), ... the list goes on forever. Frequencies from 137 kHz to hundreds of GHz are available for experimentation. In most countries nowadays the "entry level" license class is very easy to achieve and I encourage everyone with some interest in technology to give it a try.