What Use Is An F-call?

What use is an F-call? Technologies come and go, some more quickly than others. Valves have been around since the 19th century, the first diode valve was developed in 1904, by John Ambrose Fleming. Despite ongoing urgings to kill them off in favour of solid state technology, they survive, much like shellac records vs mp3 files, fond tools that do their job in their own inimitable way. Some technologies become obsolete, sometimes really quickly, audio-cassettes, DAT tape and VHS are things of the past, no doubt an mp3 of the future will look nothing like what we use today. New technology happens all the time. Software Defined Radios are bringing a whole new dimension to Amateur Radio, the ability to see a whole band in real-time makes for an exciting place to make contacts and monitor a band, seeing activity, rather than just waiting to hear something on the frequency that you happen to be tuned to. In Amateur Radio this development happens because people get excited about something and run with it. Someti