Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1A8CF38000098; Sun, 6 Jan 2013 09:14:17 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TrqyF-0006bg-Ev for rs_out_1@blacksheep.org; Sun, 06 Jan 2013 14:13:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TrqyE-0006bX-Md for rsgb_lf_group@blacksheep.org; Sun, 06 Jan 2013 14:13:02 +0000 Received: from imr-ma03.mx.aol.com ([64.12.206.41]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TrqyC-000169-2c for rsgb_lf_group@blacksheep.org; Sun, 06 Jan 2013 14:13:01 +0000 Received: from mtaout-db04.r1000.mx.aol.com (mtaout-db04.r1000.mx.aol.com [172.29.51.196]) by imr-ma03.mx.aol.com (Outbound Mail Relay) with ESMTP id 13D2D1C00007D for ; Sun, 6 Jan 2013 09:12:38 -0500 (EST) Received: from Black (188-194-147-142-dynip.superkabel.de [188.194.147.142]) by mtaout-db04.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 23206E0006F8 for ; Sun, 6 Jan 2013 09:12:37 -0500 (EST) Message-ID: From: "Markus Vester" To: References: <871180718.807959.1357202851097.JavaMail.open-xchange@email.1und1.de> <8CFB7BD49F0E58C-6E8-60E@webmail-d164.sysops.aol.com> <4D45055C381D4BECA4B1BEF1254E1059@Black> <004a01cdec0e$965b1020$0201a8c0@marco09cqcdi12> <006001cdec14$0a0c9430$0201a8c0@marco09cqcdi12> In-Reply-To: <006001cdec14$0a0c9430$0201a8c0@marco09cqcdi12> Date: Sun, 6 Jan 2013 15:12:32 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1357481558; bh=trRDV2LPfMtAXuIOHL0/aSeK/7tleVM+9I7lfFqT3JE=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=ddyJmaquUMc10WNBMCkwTdXisS+BRO6rdYS8+zSTVEslP5NDGhwelIUX9S2FIP8DY GLfudzAZN8T6eZytPWUs9zZTh8Jr9+r/wdv8b0iQt422oAqa35JYOQ1Qj3a5jEmQBd h5T7frY7N6EbJrkJ/yctsPSGC4VVHviG836N3gM4= X-AOL-SCOLL-SCORE: 0:2:410061280:93952408 X-AOL-SCOLL-URL_COUNT: 0 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: Thanks very much Marco and Terry for trying, and to Klaus DJ6LB who sent a nice recording from 20 km. I have stopped transmitting at 13:50 due to onsetting rain, but may resume an hour later if the weather lets me. [...] 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 [64.12.206.41 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 61bef6b4a633d435cac5ff7820137883 Subject: LF: Re: Re: Re: Bandlimited SSB test on 136 kHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_00E7_01CDEC20.40486F90" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE, HTML_MESSAGE,MISSING_OUTLOOK_NAME 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-SCOLL-AUTHENTICATION: mtain-mg02.r1000.mx.aol.com ; domain : mx.aol.com DKIM : fail X-AOL-OVERRIDE-PIK-REASON: Y x-aol-sid: 3039ac1d60ca50e986b960bf X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_00E7_01CDEC20.40486F90 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Thanks very much Marco and Terry for trying, and to Klaus DJ6LB who sent = a nice recording from 20 km. I have stopped transmitting at 13:50 due to = onsetting rain, but may resume an hour later if the weather lets me. Terry the slow-voice stuff still needs a litte more work. I will be = happy to share it once it runs a bit more reliably. And despite my = scepticism, I would indeed be interested to team up with Geri and others = to try FreeDV on low bands. Best 73, Markus (DF6NM) ----- Original Message -----=20 From: Terry GW0EZY=20 To: Markus DF6NM=20 Sent: Sunday, January 06, 2013 2:54 PM Subject: RE: Bandlimited SSB test on 136 kHz Hi Markus=20 I am always interested in new communications experiments! I listened for your test transmission at 13:30 but, unfortunately, heard = nothing. I=E2=80=99ve used my SDR-IQ to record the spectrum so I can = analyse off-line in more detail later.=20 Although I am not yet in a position to Tx on 136 kHz, I will try to = monitor your slow SSB tests if you would like to make the software = available. I know you do not fancy using DV but just to mention that I have had = some success (on HF) with FreeDV. This uses a recently developed = opensource CODEC and has an 1100 Hz BW.=20 73 and GL with the tests. Terry GW0EZY=20 ----- Original Message -----=20 From: Marco Cadeddu=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Sunday, January 06, 2013 2:45 PM Subject: LF: Re: Re: Bandlimited SSB test on 136 kHz Sorry Markus... I see from your grabber that you started.. but nothing here to = hear..just a steady tone on 137.5 will qsy back on 472 wspr (rx only!) 73 de Marco, IK1HSS ----- Original Message -----=20 From: Marco Cadeddu=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Sunday, January 06, 2013 1:06 PM Subject: LF: Re: Bandlimited SSB test on 136 kHz Hi Markus, stucked of bad cnd on 472 (Stefan arrives irregularly with -30 dB = S/N....) I'm now in rx usb on 136=20 GL 73 Marco, IK1HSS ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Sunday, January 06, 2013 12:50 PM Subject: LF: Bandlimited SSB test on 136 kHz Dear LF, around midday I have been conducting some test transmissions using = 136.0 kHz USB voice. To comply with German regulations, the audio = spectrum has been cut off sharply below 300 Hz and above 1100 kHz, = occupying 136.3 to 137.1 kHz RF. Despite this rather mediocre speech = quality, it is still possible to hear the voice and copy a simple = message.=20 To my surprise, the speech was quite audible on the Twente WebSDR = (434 km), squeezed between the bursts of DCF and HGA. There's a = recording and screenshot at http://www.df6nm.bplaced.net/LF/ssb/ Of course it does get boring speaking only to myself ;-). If you'd = like to listen yourself, I intend to do another test transmission = starting 13:30 this afternoon. As the audio is realtime and standard SSB = (apart from the filtering), no software postprocessing is needed.. Slow voice transmission (ie the audio deceleration/acceleration = method originally used by DK8KW and myself) would be nicer as it can fit = a full SSB channel into 800 Hz. I have been working on a semi-automatic = control, with a fixed one minute raster similar to JT9-1. This will = hopefully allow us to comfortably exchange one 20 second voice message = per time slot (speak during seconds 0 to 20, concurrent transmit and = receive at 1/3 speed from 0 to 60, replay starting 40 to 60). Anyone = interested? Best 73, Markus (DF6NM) ... ------=_NextPart_000_00E7_01CDEC20.40486F90 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Thanks very much Marco and Terry for = trying, and to=20 Klaus DJ6LB who sent a nice recording from 20 km. I have stopped=20 transmitting at 13:50 due to onsetting rain, but may resume an hour = later=20 if the weather lets me.
 
Terry the slow-voice stuff still needs = a litte more=20 work. I will be happy to share it once it runs a bit more reliably. And = despite=20 my scepticism, I would indeed be interested to team up with = Geri and=20 others to try FreeDV on low bands.
 
Best 73,
Markus (DF6NM)
 
 
 
----- Original Message -----
From: Terry=20 GW0EZY
Sent: Sunday, January 06, 2013 = 2:54=20 PM
Subject: RE: Bandlimited SSB test = on 136=20 kHz

Hi=20 Markus 
I=20 am always interested in new communications = experiments!
 
I=20 listened for your test transmission at 13:30 but, unfortunately, heard = nothing.=20 I=E2=80=99ve used my SDR-IQ to record the spectrum so I can analyse = off-line in more=20 detail later. 
Although=20 I am not yet in a position to Tx on 136 kHz,  I will try to monitor = your=20 slow SSB tests if you would like to make the software=20 available.
 
I=20 know you do not fancy using DV but just to mention that I have had some = success=20 (on HF) with FreeDV. This uses a recently developed  opensource = CODEC and=20 has an 1100 Hz BW. 
73=20 and GL with the tests.
 
Terry=20 GW0EZY
 
----- Original Message ----- =
From:=20 Marco=20 Cadeddu
Sent: Sunday, January 06, 2013 = 2:45=20 PM
Subject: LF: Re: Re: = Bandlimited SSB test=20 on 136 kHz

Sorry Markus...
I see from your grabber that you = started.. but=20 nothing here to hear..just a steady tone on 137.5
 
will qsy back on 472 wspr (rx = only!)
 
73 de Marco, IK1HSS
----- Original Message -----
From:=20 Marco=20 Cadeddu
To: rsgb_lf_group@blacksheep.org= =20
Sent: Sunday, January 06, = 2013 1:06=20 PM
Subject: LF: Re: Bandlimited = SSB test=20 on 136 kHz

Hi Markus,
 
stucked of bad cnd on 472 (Stefan = arrives=20 irregularly with -30 dB S/N....) I'm now in rx usb on 136 =
 
GL
73 Marco, IK1HSS
----- Original Message ----- =
From:=20 Markus=20 Vester
To: rsgb_lf_group@blacksheep.org= =20
Sent: Sunday, January 06, = 2013 12:50=20 PM
Subject: LF: Bandlimited = SSB test on=20 136 kHz

Dear LF,
 
around midday I have=20 been conducting some test transmissions using 136.0 = kHz USB=20 voice. To comply with German regulations, the audio = spectrum has=20 been cut off sharply below 300 Hz and above 1100 kHz, = occupying=20 136.3 to 137.1 kHz RF. Despite this rather mediocre = speech=20 quality, it is still possible to hear the voice and copy = a=20 simple message. 
 
To my surprise, the = speech was quite=20 audible on the Twente WebSDR (434 km), squeezed between = the=20 bursts of DCF and HGA. There's a recording and screenshot = at
http://www.df6nm.bplaced.ne= t/LF/ssb/
Of course it does get boring = speaking only to=20 myself ;-). If you'd like to listen yourself, I intend to do = another test=20 transmission starting 13:30 this afternoon. As the audio is = realtime=20 and standard SSB (apart from the filtering), no software = postprocessing is=20 needed..
 
Slow voice transmission (ie=20 the audio deceleration/acceleration method originally used by = DK8KW=20 and myself) would be nicer as it can fit a full SSB = channel into=20 800 Hz. I have been working on a semi-automatic = control,=20 with a fixed one minute raster similar to JT9-1. This will = hopefully=20 allow us to comfortably exchange one 20 second voice message per = time slot=20 (speak during seconds 0 to 20, concurrent=20 transmit and receive at 1/3 speed from 0 to 60,=20 replay starting 40 to 60). Anyone interested?
 
Best 73,
Markus (DF6NM)
...
   
------=_NextPart_000_00E7_01CDEC20.40486F90--