[CW] Re: Numbers stations

[wealsowalk at aol.com]

George, there is another reason sometimes.  If you operate QRSS, very,
very slow cw, then the receiving end can follow you even if the signal 
is
well under his noise.  That is, when it cannot be heard at all.  Using
existing QRSS software what the receiving end does is to scan each dit
or dah many times, sometimes hundreds of times or more, averaging the
result.  The noise, being random, is averaged out and disappears,
leaving only the signal, which adds to itself and does not dissappear
because it is not random.   Of course that does not help with an
overpowering other signal, but it does remove the pure noise. On the
screen you see a line trace of the signal as it goes on and off leaving
readable CW.  Consider a milliwatt signal originating in China and
arriving in San Francisco and you might see the efficacy of that.  QRPp
moonbounce has also been done this way.

Also, about the original topic for this thread, "Numbers stations:"   I
may have missed something here, but are you sure you are listening to
numbers?  There is a system that is on the air wherein each character
has 5 dits or dahs that is not numbers, but characters.  It originates
in Russia and might or might not be HAM signals.  Russia is just over
there you know, not much further than Canada.
Bill Isakson
AC6QV

-----Original Message-----
From: George Allgood <Myp4k69 at bellsouth.net>
To: ka4inm at tampabay.rr.com; CW Reflector <cw at mailman.qth.net>
Sent: Thu, 11 Sep 2008 11:52 am
Subject: Re: [CW] Re: Numbers stations

Hi Ron,

Please explain how lower morse code speeds are more noise immune than
higher
speeds?
That's a new one for me!
Thanks

George, W4GFA

----- Original Message -----
From: "Ron Youvan" <ka4inm at tampabay.rr.com>
To: "CW Reflector" <cw at mailman.qth.net>
Sent: Thursday, September 11, 2008 1:48 PM
Subject: Re: [CW] Re: Numbers stations


> >   Otherwise, someone has to still
> > be training operators to copy Morse code.
>
>    Computers can send and receive cw, and at very high speeds,
> lower speeds are more noise immune.
> --
>     Ron  KA4INM - Spell check and proof read your messages to see if
you
any words out.
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