QRZ.com: (http://www.qrz.com/index.html). You’ll hear ham operators say they are “on QRZ.”) That’s this website, useful for lots of things, but a popular place to look people up by call sign. Operators sometimes maintain bios, display photos, etc.
Connector Guide: (http://www.diamondantenna.net/pdfdocs/connectorguide.pdf) Here’s Diamond Antennas’ guide to the sometime baffling world of Ham Radio antenna connectors.