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
|
