[Elecraft] Digimodes what am I missing?

[Phil Kane]

On 3/21/2014 9:32 AM, Walter Underwood wrote:

> Automatic error correction is the real difference that makes modern
> digital modes more effective than manual digital modes (Morse) or
> send-and-pray digital modes (RTTY).


7-level  error-correcting ARQ was in heavy commercial use in the 1950s.
 It did require duplex operation, though.  As Wise King Solomon said
"there is nothing new under the sun".

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

>From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon