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CW stands for "continuous wave" transmissions, and it dates back to the earliest days of amateur radio. Thinking of the old telegraph offices, communication was accomplished with a "straight key"

and the operator, using "Morse Code" simply used the key to interrupt a continuous transmission into "dits" and "dahs".
Over the years, CW has lost much popularity, although many still practice this mode of communications and it is widely held that when all else fails, CW will still get through. Since it uses very little bandwidth and due to its nature, CW can be "pulled out of the mud" when nothing else can be deciphered.

Not truly a digital mode, since it isn't binary, CW is still considered to be digital by many.

Beginner's Guide to making contacts with CW:

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last modified: 2007-11-10 16:38:49