Delivered-To: daveyxm@virginmedia.com Received: by 10.50.33.134 with SMTP id r6csp29119igi; Sun, 4 Aug 2013 02:58:08 -0700 (PDT) X-Received: by 10.180.20.105 with SMTP id m9mr3607087wie.44.1375610287566; Sun, 04 Aug 2013 02:58:07 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id zb6si8233776wjc.124.2013.08.04.02.58.06 for ; Sun, 04 Aug 2013 02:58:07 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1V5uXg-0000HW-Ow for rs_out_1@blacksheep.org; Sun, 04 Aug 2013 10:24:00 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1V5uXg-0000HN-4P for rsgb_lf_group@blacksheep.org; Sun, 04 Aug 2013 10:24:00 +0100 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1V5uXd-0004Vf-Kk for rsgb_lf_group@blacksheep.org; Sun, 04 Aug 2013 10:23:59 +0100 Received: from AGB ([2.31.63.84]) by mwinf5d36 with ME id 8ZPt1m0051p3dTW03ZPtub; Sun, 04 Aug 2013 11:23:56 +0200 Message-ID: <8432F35CE338426BB0974C69543E1615@AGB> From: "Graham" To: References: <51FC40B3.8060307@virginbroadband.com.au> <652B496A852640E69B77E2F9B2F1D1AF@White> <51FDA348.9060804@iup.uni-heidelberg.de> In-Reply-To: <51FDA348.9060804@iup.uni-heidelberg.de> Date: Sun, 4 Aug 2013 10:23:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 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: 'What happens if there is QSB during that time' Better chance of a decode , as things go up as well as down and Opera is just a average system :- ) [...] 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 [80.12.242.59 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 8784cdbd504ef8804d6bf58c55c77386 Subject: Re: LF: DK7FC Equinox reception Content-Type: multipart/alternative; boundary="----=_NextPart_000_002F_01CE90FC.B8162360" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,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 Status: O X-Status: X-Keywords: X-UID: 2270 This is a multi-part message in MIME format. ------=_NextPart_000_002F_01CE90FC.B8162360 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 'What happens if there is QSB during that time' Better chance of a decode , as things go up as well as down =20 and Opera is just a average system :- ) G,=20 From: Stefan Sch=E4fer=20 Sent: Sunday, August 04, 2013 1:41 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: DK7FC Equinox reception Hi Markus, Edgar,=20 Well i think it is most promising to start with the good old DFCW-180. = If the success is clear and if there is no other station announcing RX = attempts, then we could continue to try other modes.=20 Markus, we're running DFCW-180 in 11 mHz, not DFCW-90. This has proved = to be the best combination, at least from my point of view. Your table states that a detection in OP-32, using your correlation = software, would result in a clear decode if the signal is as good as "M" = copy in 11 mHz, right? What happens if there is QSB during that time? = The events of > 30 minutes without QSB are quite rare i think. It looks = like i have to use a kite antenna here on the building :-) 73, Stefan/DK7FC Am 03.08.2013 13:47, schrieb Markus Vester:=20 Hi Edgar, LF, this looks like a great project, and it's good to see a live grabber = from VK7 again. So with that extra distance you might reach the top = three in the DX list... unless Mike, Bob, or someone else takes the = challenge and picks up Stefan in ZL ;-)=20 Orford - that's surely a nice location. On the occasion of attending a = conference some 15 years ago, we were lucky enough to be able to drive = around the Tasmanian east cost for a few days. We were much impressed by = the beauty of the landscape, the clear skies, and the friendly and = easygoing manner of the inhabitants. Are Stefan and you intending to focus on DFCW only, or try other modes = as well? Attached beneath is a short table, lining up approximate = sensitivities for a few weak-signal options. Best 73, Markus (DF6NM) Mode norm.SNR SNR bandw. duration remarks dBHz dB mHz minutes carrier -18 14 0.4* >30 highly significant peak in 0.4 = mHz spectrum DFCW-90 -12 6 11* 42 marginal "M" detection in = spectogram DFCW-90 -6 12 11* 42 fully readable "O" Opera-32 -1 8 125 33 reliable decoding by Opera = software Opera-32 -12 21 0.5 33 correlation detection of a = coherent transmission WSPR-15 -4 3.5 180 15 decoding by WSPRX software WSPR-30 -7 3.5 90 30 accelerated replay to WSPR = software MFSK37 -9 14 3.3* 25 visual decode or automated peak = search Notes: - SNR thresholds are only approximate. - SNR referenced to carrier power (not average). - normalized SNR in 2.5 kHz can be obtained by subtracting 34 dB from = dBHz. * noise bandwidth is 1.5 times the stated FFT bin width. =20 - duration to send "DK7FC" message (19 dashes and 4 spaces). - MFSK37 is absolute frequency keying, sending one 5 minute dash per = character. From: edgar=20 Sent: Saturday, August 03, 2013 1:28 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: DK7FC Equinox reception Hi, During the last three Equinoxes I have attempted to receive DK7FC's=20 signal at QE37pd, Moonah, Tasmania. The best result was achieved last April. Refer to:=20 https://dl.dropboxusercontent.com/u/101251787/DK7FC%20reception.pdf I decided for next Equinox period, (20th September 2013), that I would = attempt to better the distance previously achieved. The results will be available on the internet. https://dl.dropboxusercontent.com/u/101251787/testIDC.html At present the equipment is set-up at QE37pd, and when possible Stefan = is running test transmissions from 19:00 to 22:00 UTC. By the middle of August the system is to be set-up at Orford, on the=20 east coast of Tasmania, to operate until the end of September. http://no.nonsense.ee/qthmap/?qth=3DQE37wk The frequencies of DCF39 and HGA22 signals are also being monitored to = determine the propagation. So I invite members to participate by monitoring the progress via the=20 web images. Regards, Edgar Moonah, Tasmania. ------=_NextPart_000_002F_01CE90FC.B8162360 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
'What happens if there is QSB during that time'
 
Better  chance of  a  decode  , as  = things =20 go  up as  well  as  down 
 
and  Opera  is  just a  average  = system  :-=20 )
 
G,
 

From: Stefan = Sch=E4fer
Sent: Sunday, August 04, 2013 1:41 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: DK7FC Equinox reception

Hi Markus, Edgar,

Well i think it is most = promising to=20 start with the good old DFCW-180. If the success is clear and if there = is no=20 other station announcing RX attempts, then we could continue to try = other modes.=20
Markus, we're running DFCW-180 in 11 mHz, not DFCW-90. This has = proved to be=20 the best combination, at least from my point of view.

Your table = states=20 that a detection in OP-32, using your correlation software, would result = in a=20 clear decode if the signal is as good as "M" copy in 11 mHz, right? What = happens=20 if there is QSB during that time? The events of > 30 minutes without = QSB are=20 quite rare i think. It looks like i have to use a kite antenna here on = the=20 building :-)

73, Stefan/DK7FC

Am 03.08.2013 13:47, schrieb = Markus=20 Vester:=20
Hi Edgar, LF,
 
this looks like a great project, and = it's good to=20 see a live grabber from VK7 again. So with that extra distance you = might reach=20 the top three in the DX list... unless Mike, Bob, or someone else = takes the=20 challenge and picks up Stefan in ZL ;-)
 
Orford - that's surely a nice = location. On the=20 occasion of attending a conference some 15 years ago, we were lucky = enough to=20 be able to drive around the Tasmanian east cost for a few days. We = were much=20 impressed by the beauty of the landscape, the clear skies, and the = friendly=20 and easygoing manner of the inhabitants.
 
Are Stefan and you intending to focus = on DFCW=20 only, or try other modes as well? Attached beneath is a short table, = lining up=20 approximate sensitivities for a few weak-signal options.
 
Best 73,
Markus = (DF6NM)
 

Mode    norm.SNR SNR bandw.=20 duration =20 remarks
         =20 dBHz    dB   mHz  =20 minutes
carrier   -18     = 14  =20 0.4*   >30     highly significant = peak in 0.4=20 mHz spectrum
DFCW-90   -12     =20 6    11*    42     = marginal=20 "M" detection in spectogram
DFCW-90   =20 -6     12    11*   =20 42     fully readable "O"
Opera-32  =20 -1      8   = 125    =20 33     reliable decoding by Opera=20 software
Opera-32  -12     21  =20 0.5     33     correlation = detection=20 of a coherent transmission
WSPR-15    = -4   =20 3.5   180     15     = decoding by WSPRX software
WSPR-30    = -7   =20 3.5    90     = 30    =20 accelerated replay to WSPR software
MFSK37    =20 -9     14   3.3*   =20 25     visual decode or automated peak=20 search
 
Notes:
- SNR thresholds are only=20 approximate.
- SNR referenced to carrier power (not average).
-=20 normalized SNR in 2.5 kHz can be obtained by subtracting 34 dB from = dBHz.
*=20 noise bandwidth is 1.5 times the stated FFT bin width. 
- = duration to=20 send "DK7FC" message (19 dashes and 4 spaces).
- MFSK37 is absolute = frequency keying, sending one 5 minute dash per = character.

From: edgar
Sent: Saturday, August 03, 2013 1:28 AM
Subject: LF: DK7FC Equinox reception

Hi,

During the last three Equinoxes I have = attempted to=20 receive DK7FC's
signal at QE37pd, Moonah, Tasmania.

The = best result=20 was achieved last April.

Refer to:
https://dl.dropboxusercontent.com/u/101251787/DK= 7FC%20reception.pdf

I=20 decided for next Equinox period, (20th September 2013), that I would=20
attempt to better the distance previously achieved.

The = results=20 will be available on the internet.

https://dl.dropboxusercontent.com/u/101251787/te= stIDC.html

At=20 present the equipment is set-up at QE37pd, and when possible Stefan =
is=20 running test transmissions from 19:00 to 22:00 UTC.

By the = middle of=20 August the system is to be set-up at Orford, on the
east coast of=20 Tasmania, to operate until the end of September.

http://no.nonsense.ee/qthmap/?qth=3DQE37wk
The=20 frequencies of DCF39 and HGA22 signals are also being monitored to=20
determine the propagation.

So I invite members to = participate by=20 monitoring the progress via the
web images.

Regards,=20 Edgar
Moonah, Tasmania.

------=_NextPart_000_002F_01CE90FC.B8162360--