Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me03.r1000.mx.aol.com (Internet Inbound) with ESMTP id EC0A93800008A; Mon, 9 Apr 2012 05:52:13 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SHBFZ-0002IE-KP for rs_out_1@blacksheep.org; Mon, 09 Apr 2012 10:51:05 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SHBFZ-0002I5-4L for rsgb_lf_group@blacksheep.org; Mon, 09 Apr 2012 10:51:05 +0100 Received: from smtpout1.wanadoo.co.uk ([80.12.242.29] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SHBFX-0004xM-KG for rsgb_lf_group@blacksheep.org; Mon, 09 Apr 2012 10:51:05 +0100 Received: from AGB ([2.26.16.234]) by mwinf5d14 with ME id vlqu1i006530C9e03lquX0; Mon, 09 Apr 2012 11:50:57 +0200 Message-ID: <8B76693BB32F4EF29F54EB5C82D12675@AGB> From: "Graham" To: References: <5C0AC4DB368E4CFE98DEACADD3B13FF2@AGB> <7E7DFBB4D102A04DB5ADC88D66628A4A0277079D@ICTS-S-MBX6.luna.kuleuven.be> In-Reply-To: <7E7DFBB4D102A04DB5ADC88D66628A4A0277079D@ICTS-S-MBX6.luna.kuleuven.be> Date: Mon, 9 Apr 2012 10:50:54 +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-Antivirus: avast! (VPS 120409-0, 09/04/2012), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RCVD_ILLEGAL_IP=0.234 Subject: Re: LF: RE: LIVE CW QSO'S ON 501.5 Khz ! Content-Type: multipart/alternative; boundary="----=_NextPart_000_0023_01CD163E.A2FF0DA0" 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_40_50,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-SCORE: 0:2:364406080:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d608b4f82b14d2a24 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_0023_01CD163E.A2FF0DA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sorry Rik, Tnx for calling=20 I think , slowly over the years (yes that long) the noise level on = MF at my qth has risen to the point , that Rx on 500 is virtually = useless , my s/n levels on decode are now usually 10dB worse = than , Gary , g4wgt , he is about 25 miles to my east inland, = but in tests last year with John up in the Shetlands, decodes = with only watts to my Ae where possible ..so the actual 'system' = is working ......may be its a case of too much gain/Q ..... = perhaps one of the 'mini' type of systems will solve the = problem. Glad the Op qso system is working , at -20 dB lower limit , its = not as low as the ROS-MF 2 system, but , its real CW with on/off = keying, and can withstand 45/50 % random data loss, which is I = think unique in a data mode?, you can copy the last 50% and still = decode. with ros-mf you need to catch the lock frame and = others , interleaves of 60 seconds would require very long tx = periods ?=20 After all it was 100 years after the introduction of hardware = based real CW data before Mr Morse came along with his coding = system ... : ) 73 -G..=20 From: Rik Strobbe=20 Sent: Monday, April 09, 2012 10:17 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: RE: LIVE CW QSO'S ON 501.5 Khz ! Graham, I copied your Opera CQ call very well (abt 0dB SNR) and replied several = times, but no succes. I was running 20W (abt 50mW ERP). 73, Rik ON7YD - OR7T -------------------------------------------------------------------------= ------- Van: owner-rsgb_lf_group@blacksheep.org = [owner-rsgb_lf_group@blacksheep.org] namens Graham = [g8fzk@g8fzk.fsnet.co.uk] Verzonden: zondag 8 april 2012 23:52 Aan: rsgb_lf_group@blacksheep.org Onderwerp: LF: LIVE CW QSO'S ON 501.5 Khz ! Who says 500 CW is dead ?=20 Opera QSO mode , providing the link PA0A / G0NBD , with decodes = down to -19 dB my side , (Not due to Pa0a signal, but due to some = as yet un-discovered Rx signal loss in my Rx path, or simply very = high local noise levels now ) , using real ON/OFF Carrier Wave = modulation as well .....also PA0A / OR7T.=20 73 -G ..=20 ------=_NextPart_000_0023_01CD163E.A2FF0DA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Sorry Rik,
 
Tnx for calling
 
I think  , slowly over the  years  (yes that long) = the =20 noise  level on MF at my qth  has  risen to  the = point ,=20 that  Rx on  500  is virtually  useless ,  = my  s/n  levels  on decode  are  now =20 usually   10dB  worse  than  , Gary  , = g4wgt ,=20 he  is about  25  miles to  my  east  = inland,=20 but  in tests  last  year  with  John up in = the =20 Shetlands, decodes  with  only  watts  to  = my =20 Ae  where possible ..so the  actual  'system'  = is =20 working ......may  be  its  a  case of  = too =20 much  gain/Q .....  perhaps  one of the  = 'mini' =20 type  of  systems  will  solve the  = problem.
 
Glad  the Op qso  system is  working , at  = -20=20 dB  lower limit , its  not  as low  as = the =20 ROS-MF  2  system, but , its  real CW  with  = on/off=20 keying, and  can  withstand   45/50 %  = random =20 data loss, which is  I think  unique in a  data  = mode?,=20 you  can  copy the  last 50% and  still  = decode.=20 with  ros-mf  you need  to  catch  the  = lock =20 frame  and  others , interleaves of  60  = seconds=20 would  require  very long  tx  periods ?
 
After all   it was  100  years  = after the=20 introduction of hardware  based   real CW data=20   before  Mr Morse came  along with his coding = system ... :=20 )
 
73 -G..

From: Rik Strobbe
Sent: Monday, April 09, 2012 10:17 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: LF: RE: LIVE CW QSO'S ON 501.5 Khz = !

Graham,

 

I copied your=20 Opera CQ call very well=20 (abt 0dB SNR) and replied several=20 times, but no succes.

I was running 20W (abt 50mW=20 ERP).

 

73, Rik  ON7YD - = OR7T

 

Van: owner-rsgb_lf_group@bl= acksheep.org=20 [owner-rsgb_lf_group@blacksheep.org] namens Graham=20 [g8fzk@g8fzk.fsnet.co.uk]
Verzonden: zondag 8 april 2012=20 23:52
Aan: rsgb_lf_group@blacksheep.org=
Onderwerp:=20 LF: LIVE CW QSO'S ON 501.5 Khz !

Who  says 500  CW is  dead ?
 
Opera  QSO  mode , providing  the link  PA0A /=20 G0NBD  , with  decodes  down to  -19 dB = my =20 side  , (Not  due to  Pa0a  signal, but due to  = some=20 as  yet un-discovered  Rx  signal  loss in = my =20 Rx  path, or simply  very  high  local  = noise =20 levels now )   , using   real  ON/OFF  Carrier=20 Wave  modulation as well .....also  PA0A / OR7T.
 
73 -G ..
 
 
 
 
 
 
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