Thanks. I'm looking for something interesting, not simple. This is good 
information. 

How much is packet radio actually used?

How about RTTY? I am thinking of the ttys deaf poeople use to 
communicate over the phone, but with a radio link instead.

John

On Tue, Apr 10, 2012 at 10:56:39PM -0400, Lloyd Rasmussen wrote:
> I had schedules with Rick Joy for several months during the 1980s, Sunday
> nights on 20 meter CW, coast-to-coast.
> 
> I think that CW vibrating a speaker cone, with the pitch set quite low, the
> RF gain turned down, and high selectivity, would be far simpler than digital
> modes driving a braille display.  The various over-the-air modes are full
> protocols with headers, acknowledgment routines and/or error correction.
> Some of the software which does this runs in Linux, so it may be accessible
> to BrlTTY or whatever you are using.  The other thing about digital modes is
> that you will have to tune the signal in to one extent or another.  With
> some combinations of software and a single-sideband receiver, sever
> different stations may appear within the passband you are receiving, and you
> click on one of the indicated frequency offsets to begin copying the
> selected signal.  I'm sure there are ways to do this stuff, but they won't
> be simple to implement.
> 73,
> Lloyd Rasmussen, W3IUU, Wheaton, Maryland
> Home:  http://lras.home.sprynet.com
> Work:  http://www.loc.gov/nls
>  
> 
> > -----Original Message-----
> > From: For blind ham radio operators [mailto:[log in to unmask]]
> > On Behalf Of John J. Boyer
> > Sent: Tuesday, April 10, 2012 9:30 AM
> > To: [log in to unmask]
> > Subject: Re: Braille QSO's
> > 
> > I think i"m referring to packet radio. Where could i find more
> > information about it.
> > 
> > Thanks,
> > John
> > 
> > On Tue, Apr 10, 2012 at 01:24:37PM +0100, David W Wood (G3YXX) wrote:
> > > You could be referring to packet radio, RTTY, PSK31 or other data modes
> > =
> > > - even CW!
> > >
> > > 73
> > >
> > >
> > > David W Wood
> > >
> > > Ham call - G3YXX
> > > FOC # - 1685
> > > Licensed - 1969
> > > =20
> > >
> > > -----Original Message-----
> > > From: For blind ham radio operators =
> > > [mailto:[log in to unmask]] On Behalf Of John J. Boyer
> > > Sent: Tuesday, April 10, 2012 1:15 PM
> > > To: [log in to unmask]
> > > Subject: Braille QSO's
> > >
> > > I don't know if my subject says what I have in mind. What I am
> > thinking=20
> > > of is connecting a braille display to a transmitter and receiver through
> > =
> > >
> > > a modem such as is used for Internet connections over a phone line. I=20
> > > think people are already using something like this with a computer. What
> > =
> > >
> > > is it called? What are the advantages and disadvantages?
> > >
> > > Thanks,
> > > John
> > >
> > > --=20
> > > John J. Boyer; President, Chief Software Developer
> > > Abilitiessoft, Inc.
> > > http://www.abilitiessoft.com
> > > Madison, Wisconsin USA
> > > Developing software for people with disabilities
> > >
> > > --
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> > --
> > John J. Boyer; President, Chief Software Developer
> > Abilitiessoft, Inc.
> > http://www.abilitiessoft.com
> > Madison, Wisconsin USA
> > Developing software for people with disabilities

-- 
John J. Boyer; President, Chief Software Developer
Abilitiessoft, Inc.
http://www.abilitiessoft.com
Madison, Wisconsin USA
Developing software for people with disabilities