The Amateur Radio Service

• Amateur Radio has been a hobby for more than a century

• Small chunks of the radio spectrum reserved for non-commercial, licensed use

• Started with Morse code (CW), then voice (Phone), and now digital modes.

• Public, un-encrypted messages

• The operator (usually) does the protocol and error correction.

Notes:

Your wireless router is in the GHz range and fractions of a watt.

Ham radio is in the megahertz range and 10-100s of watts.

Internet messaging: directed and (hopefully) confidential.

Radio: undirected and public.