Digimodes what am I missing?

[Phil Kane-2]

On 3/21/2014 8:39 AM, Walter Underwood wrote:

> CW is neat as a hobby technology, but commercially, it is less
> relevant than blacksmithing. There are quite a few professional
> blacksmiths, but no professional CW operators.

Oh??  See:  www.radiomarine.org.   Station KSM is banging away while I
sit here and type.  It is a Public Coast Station open to commercial
marine traffic manned by professional CW operators.  Some of them even
have ham licenses!

> when I was studying EE at Rice, analog modes were about as interesting as power supplies.

What do you think makes those "digital gadgets" run?  Air?  And where
does it comes from?  The wall?

My consulting engineering firm not only designs the microwave and data
transport systems for public safety communication of our clients,  but
also the power systems necessary to keep them running in 24/7 service.

It doesn't happen by magic.

73 de K2ASP - Phil Kane (P.E.)
T2-00000208  (one of the last 10 issued)
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[Phil Kane-2]

On 3/21/2014 8:52 AM, Ross Primrose wrote:

> I think you've underestimated by quite a bit.  RTTY has been around
> since the early '30s.

And I'm still of the generation who could tune across the HF bands and
pick out the simplex, multiplex, and multi-channel commercial circuits
by ear.  I worked in that slice of the industry just about the time that
underseas cable and satellite circuits caused them to fall silent.  I
still hear the idle tones (RYs for the RTTY fans) in my dreams.
--
73 de K2ASP - Phil Kane
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[Phil Kane-2]

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
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