HI Bob, does this DRM sound a lot like IBOC with that annoying data sound
around the sidebands fo rht efrequencies? How well is DRM working, and
how much aer these receivers?
On Fri, 4 Aug 2006, Bob Tinney wrote:
> Hi,
>
> I believe the Icom D Star radios use a really old technology of reverse
> sideband scrambling. There is nothing modern in those rigs.
>
> Also some shortwave stations are broadcasting in digital format called DRM,
> but it has not caught on. I think the BBC still broadcasts to North America
> using DRM for 1 hour per day at 0100z or 2100EDT on 6.010MHZ. I've also
> heard a German station on 3.995 in the evening using DRM.
> 73
> Bob, [log in to unmask], K8LR
> Skype Name: bobtinn
> Life is GOOD!
>
> ----- Original Message -----
> From: "Jeff Kenyon" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, August 04, 2006 11:03 AM
> Subject: Re: [BLIND-HAMS] Digital Voice
>
>
> Hasn't there been some experiments with digital voice for short-wave
> broadcasters? I thought I heard that there were, but it wasn't working
> out that well.
>
>
>
>
>
> On Fri, 4 Aug 2006, Frederick wrote:
>
> > Hi
> > I am not sure about the Icom radios you mentioned having digital voice
> > or not. It would seem to me that a standardized digital voice mode would
> > be
> > a great enhancement for the HF spectrum.
> > God bless,
> > Mark WZ0K
> > God loves you!
> > My personal prayer book.
> > Add your prayer or pray for others at the following link.
> > http://prayerbook.homewithgod.com/cgi-bin/prayerbook/multi.pl?131961113534708:24:0
> >
> > http://lists.topica.com/lists/funhamradio.
> > http://groups.google.com/group/funhamradio-list
> >
> > http://funhamradio.bloki.com
> > ----- Original Message -----
> > From: "Colin McDonald" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Friday, August 04, 2006 7:13 AM
> > Subject: Re: Digital Voice
> >
> >
> > > what about the D star radios from Icom? don't they do some sort of
> > > digital
> > > voice?
> > > I know they do digital data, but i thought they also did some sort of
> > > digital voice incription as well.
> > >
> > > only problem with doing digital voice on the amateur bands is that it
> > > has
> > > to
> > > be a completely open source incription type that anyone could easily
> > > decode
> > > since if it weren't,it could be considered secret encoded messages,
> > > which,
> > > as far as i know, are illegal in the US as well without permission from
> > > the
> > > FCC?
> > >
> > > The canadian regulations, paraphrasing of course, make it illegal to use
> > > any
> > > kind of secret code to pass messages without express permission from the
> > > government. Digital voice incription could potentially fall under that
> > > category.
> > > If someone was using say provoice or even apco 25 on a local simplex
> > > frequency, it would be nearly impossible for me, or anyone else to know
> > > what
> > > they were saying since we wouldn't have the necessary codec to decode
> > > their
> > > transmission. The transmission would there for be in a "secret" code
> > > and
> > > against regulations.
> > > Now,if a person offered the software or instructions on how to build a
> > > decoder on a website, or in a popular monthly magazine, the idea of
> > > secretive incoding would be no longer secretive since many people would
> > > have
> > > the means of decoding it.
> > > just my view point anyway,i could be off the mark on this one, but i
> > > have
> > > pondered it for some time since our 52 group has tossed around the idea
> > > of
> > > digitalizing our transmissions.
> > > 73
> > > Colin, V A6BKX
> > > ----- Original Message -----
> > > From: "Jeff Kenyon" <[log in to unmask]>
> > > To: <[log in to unmask]>
> > > Sent: Friday, August 04, 2006 2:40 AM
> > > Subject: Re: Digital Voice
> > >
> > >
> > >> Hi, there is an external card for APCO-25 modulation for the Uniden
> > >> BC259D
> > >> scanner, but nothing I know of for the ham bands. There have been a
> > >> few
> > >> experiments though with APCO-25 useage on the ham bands though.
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> On Thu, 3 Aug 2006, Frederick wrote:
> > >>
> > >> > Hi
> > >> > I have been wondering for sometime if there are any digital voice
> > >> > converters that a person could plug in to there older analog rigs. I
> > > think
> > >> > that transmitting and receiving in digital voice on the ham bands
> > >> > would
> > > be
> > >> > the coolest thing.
> > >> > God bless,
> > >> > Mark WZ0K
> > >> > God loves you!
> > >> > My personal prayer book.
> > >> > Add your prayer or pray for others at the following link.
> > >> >
> > > http://prayerbook.homewithgod.com/cgi-bin/prayerbook/multi.pl?131961113534708:24:0
> > >> >
> > >> > http://lists.topica.com/lists/funhamradio.
> > >> > http://groups.google.com/group/funhamradio-list
> > >> >
> > >> > http://funhamradio.bloki.com
> > >> >
> > >>
> > >
> > >
> >
>
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