Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 33E4538000091; Thu, 3 Jan 2013 04:09:30 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TqgSy-0007xH-9S for rs_out_1@blacksheep.org; Thu, 03 Jan 2013 08:47:56 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TqgSx-0007x7-EU for rsgb_lf_group@blacksheep.org; Thu, 03 Jan 2013 08:47:55 +0000 Received: from moutng.kundenserver.de ([212.227.17.8]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TqgSu-000234-2a for rsgb_lf_group@blacksheep.org; Thu, 03 Jan 2013 08:47:54 +0000 Received: from oxbaltgw01.schlund.de (oxbaltgw01.schlund.de [172.19.246.7]) by mrelayeu.kundenserver.de (node=mreu0) with ESMTP (Nemesis) id 0Mg2LJ-1Tc3MM0S7p-00Nbeh; Thu, 03 Jan 2013 09:47:31 +0100 Date: Thu, 3 Jan 2013 09:47:31 +0100 (CET) From: "geri@dk8kw.de" To: rsgb_lf_group@blacksheep.org Message-ID: <871180718.807959.1357202851097.JavaMail.open-xchange@email.1und1.de> In-Reply-To: References: <0A4D88A68FCB4F22A2BC40825788A6AA@AGB> <1357150913.48886.YahooMailNeo@web133204.mail.ir2.yahoo.com> <63C5AFAA6F8C41A7936F2069D38FAC01@AGB> <81FED2F455C94E45B3BE41353A6D53BC@W1KW> <52B2628757094925BA8206A2C0D9640B@AGB> <1357173044.69099.YahooMailNeo@web133203.mail.ir2.yahoo.com> <48BBF8CC892E4164B0E96E856BB44972@gnat> MIME-Version: 1.0 X-Priority: 3 Importance: Medium X-Mailer: Open-Xchange Mailer v6.20.7-Rev4 X-Provags-ID: V02:K0:9W3Jw4U/R7NkCBxc//omgc4ESXypK/jjosYIer/vhHR THBOkTVvdVj4y39d2PQA4fhdfCnfmqWkM4tgF7zMXok7g5qSmp wrlCyI0s7U3egXA1YgFIfjeML6uxuqeD4GUcivusb5qtuwZXx/ RAlY+gk7cKCyvqSG8iYxpJ7xHB/FACmBTQiBZ8l19PMFd/swF0 c0M3J01r4vnEr3lHHCWspEZfO+lg8YnutjrVEoObKQzhivy9Cr MKqkn0vCWSZTu5dobrFKEFrBtCYfNp3yAxhP7X4seJNUDUXolB TBxkkMNYSu6RFliMddONdu4XwyvQlwQDs6+SaFWWMXSob0bK3F oDbIUu1MzX/sXORt7s8c1NptEQC+98hRQZJy5ulV6i+4/HEck9 pCiTE+vXtjG9CiE17LcC6GSavffuhQyV4U= X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi, I just did some research and obviously there are people who already have thought about low bandwidth voice communications. There is a mode called FDMNV, based on a common CODEC that transmits voice in a 1100 Hz bandwidt (see http://n1su.com/fdmdv/ ). [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.227.17.8 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 3547ef0bd9aa4f6a2596c8a6b1b20265 Subject: LF: SSB - why not go digital? Have a look at FDMNV Content-Type: multipart/alternative; boundary="----=_Part_807958_1056463741.1357202851045" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1db40950e54ac97bc3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_Part_807958_1056463741.1357202851045 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, I just did some research and obviously there are people who already have thought about low bandwidth voice communications. There is a mode called FDMNV, based on a common CODEC that transmits voice in a 1100 Hz bandwidt (see http://n1su.com/fdmdv/ ). In the describtion of the software it says "it caters to high quality digital voice under poor band conditions, in only 1100Hz bandwidth" which probably is the kind of features we are looking for. The software is open source and surely worth to have acloser look at. Also, i am sure we (in Germany) can negotiate with our authorities to get an extension of our 800 Hz bandwidth limitation at least under certain conditions. For everyone without limitation this seems to be the software to just go ahead and try it! Best 73 Geri, DK8KW > > ----- Original Message ----- > > From: M0FMT > > To: rsgb_lf_group@blacksheep.org > > Sent: Thursday, January 03, 2013 12:30 AM > > Subject: Re: LF: 477 A local SSB chat band ? > > > > > > Hi Graham Geri and all > > > > Warren has seen SSB first hand on the MF QRG and we have this side also.There was an SM station (call sign forgotten?) in the early days of 500 that added an SSB anouncement on his beacon and it worked well. > > > > To my spec. :- "One SSB channel at the high edge of the band only used during daylight hours no DXing!" add " Use VOX, no monologuing allowed" to be a laissez faire operation no band plan, but fair play!.73 es GL es HNY Pete M0FMT IO91UX > > > > From: Graham > > To: rsgb_lf_group@blacksheep.org > > Sent: Wednesday, 2 January 2013, 20:48 > > Subject: Re: LF: 477 A local SSB chat band ? > > > > > > > > Geri > > > > 800 Hz B/W ... May be this is something 'Wolf' can code for you ? a b/w compression / expansion module in SL , to limit the tx b/w to 800 Hz must be possible to divide by 3 and mult by 3 with a linear shift as well ? > > > > G.. > > > > > > From: Holger 'Geri', DK8KW - DI2BO - W1KW > > Sent: Wednesday, January 02, 2013 8:36 PM > > To: rsgb_lf_group@blacksheep.org > > Subject: Re: LF: 477 A local SSB chat band ? > > > > > > Hi, > > > > I kind of like the idea of an SSB channel. I just pulled out the conditions of my first secial license for 160m from 1973 or 1974. That said 1815 to 1835 kHz with 10 Watts in CW, additionally one SSB channel for 1832 to 1835 kHz, so why not trying this on 630m, too? Here in Germany we are currently limited to 800 Hz bandwidt but I am sure we can sork towards a special license under certain conditions such as daylight operation only .. sounds good to me! > > > > Vy 73 > > > > Geri, DK8KW > > ------=_Part_807958_1056463741.1357202851045 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit
Hi,
 
I just did some research and obviously there are people who already have thought about low bandwidth voice communications. There is a mode called FDMNV, based on a common CODEC that transmits voice in a 1100 Hz bandwidt (see http://n1su.com/fdmdv/).
 
In the describtion of the software it says "it caters to high quality digital voice under poor band conditions, in only 1100Hz bandwidth" which probably is the kind of features we are looking for. The software is open source and surely worth to have acloser look at. 
 
Also, i am sure we (in Germany) can negotiate with our authorities to get an extension of our 800 Hz bandwidth limitation at least under certain conditions. For everyone without limitation this seems to be the software to just go ahead and try it!
 
 
Best 73
 
Geri, DK8KW
 
 
> > ----- Original Message -----
> > From: M0FMT
> > To: rsgb_lf_group@blacksheep.org
> > Sent: Thursday, January 03, 2013 12:30 AM
> > Subject: Re: LF: 477 A local SSB chat band ?
> >
> >
> > Hi Graham Geri and all
> >
> > Warren has seen SSB first hand on the MF QRG and we have this side also.There was an SM station (call sign forgotten?) in the early days of 500 that added an SSB anouncement on his beacon and it worked well.
> >
> > To my spec. :- "One SSB channel at the high edge of the band only used during daylight hours no DXing!" add " Use VOX, no monologuing allowed" to be a laissez faire operation no band plan, but fair play!.73 es GL es HNY Pete M0FMT IO91UX
> >
> > From: Graham <g8fzk@g8fzk.fsnet.co.uk>
> > To: rsgb_lf_group@blacksheep.org
> > Sent: Wednesday, 2 January 2013, 20:48
> > Subject: Re: LF: 477 A local SSB chat band ?
> >
> >
> >
> > Geri
> >
> > 800 Hz B/W ... May be this is something 'Wolf' can code for you ? a b/w compression / expansion module in SL , to limit the tx b/w to 800 Hz must be possible to divide by 3 and mult by 3 with a linear shift as well ?
> >
> > G..
> >
> >
> > From: Holger 'Geri', DK8KW - DI2BO - W1KW
> > Sent: Wednesday, January 02, 2013 8:36 PM
> > To: rsgb_lf_group@blacksheep.org
> > Subject: Re: LF: 477 A local SSB chat band ?
> >
> >
> > Hi,
> >
> > I kind of like the idea of an SSB channel. I just pulled out the conditions of my first secial license for 160m from 1973 or 1974. That said 1815 to 1835 kHz with 10 Watts in CW, additionally one SSB channel for 1832 to 1835 kHz, so why not trying this on 630m, too? Here in Germany we are currently limited to 800 Hz bandwidt but I am sure we can sork towards a special license under certain conditions such as daylight operation only .. sounds good to me!
> >
> > Vy 73
> >
> > Geri, DK8KW
> >
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