Return-Path: Received: from rly-de02.mx.aol.com (rly-de02.mail.aol.com [172.19.170.138]) by air-de01.mail.aol.com (v121_r5.5) with ESMTP id MAILINDE012-4b7495c9d672f5; Thu, 01 Jan 2009 05:39:42 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-de02.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDE022-4b7495c9d672f5; Thu, 01 Jan 2009 05:39:37 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LIKxO-0003L5-F6 for rs_out_1@blacksheep.org; Thu, 01 Jan 2009 10:39:14 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LIKxN-0003Kw-Pq for rsgb_lf_group@blacksheep.org; Thu, 01 Jan 2009 10:39:13 +0000 Received: from smtp-out-4.talktalk.net ([62.24.128.234] helo=smtp.talktalk.net) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LIKxI-0001aM-Fg for rsgb_lf_group@blacksheep.org; Thu, 01 Jan 2009 10:39:13 +0000 X-Path: TTSMTP X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqAFAGYrXElZ8I+t/2dsb2JhbACCQC+BZ4QtgicGiSC3IYVy Received: from unknown (HELO mal769a60aa920) ([89.240.143.173]) by smtp.talktalk.net with SMTP; 01 Jan 2009 10:39:05 +0000 Message-ID: <002b01c96bfd$298f12b0$0301a8c0@mal769a60aa920> From: "mal hamilton" To: "rsgb" Date: Thu, 1 Jan 2009 10:39:01 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Karma: 0: X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,SUBJ_ALL_CAPS=1.166 Subject: LF: QRS V DIGITAL Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01C96BFD.292AF9B0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_20_30,HTML_MESSAGE, SUBJ_ALL_CAPS 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-IP: 193.82.116.20 ------=_NextPart_000_0028_01C96BFD.292AF9B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jim and Co Following the recent discussion and your observations about WSPR and JT65. I= am still of the opinion, all things considered like simplicity, bandwidth,=20= signal over noise and transfer of information that QRS3 is to date the most=20= suitable mode for LF and MF. The variant DFCW would speed up the exchange o= f info.=20 Even with QSB enough info is usually exchanged to make a QSO viable.=20 One way to minimise the QSB is to increase power and 100w erp would not be e= xcessive. QRS 3/2/1 and DFCW are the most suitable for this application, given the pow= er constraints especially in the UK at present. Monitoring recent WSPR and JT65 transmissions and waiting for a decode I cou= ld see the traces clearly before any printout and had the transmission been= on QRS 3, I could have read a message several times over on the waterfall d= isplay. 73 and HNY de Mal/g3kev ------=_NextPart_000_0028_01C96BFD.292AF9B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Jim and Co
Following the recent discussion and your=20 observations about WSPR and JT65. I am still of the opinion, all things=20 considered like simplicity, bandwidth, signal over noise and transfer of=20 information that QRS3 is to date the most suitable mode for LF and MF. = The=20 variant DFCW would speed up the exchange of info.
Even with QSB enough info is usually e= xchanged=20 to make a QSO viable.
One way to minimise the QSB is to increase=20= power=20 and 100w erp would not be excessive.
QRS 3/2/1 and DFCW are the most suitab= le for=20 this application, given the power constraints especially in the UK at=20 present.
Monitoring recent WSPR and JT65 transm= issions=20 and waiting for a decode I could see the traces clearly before any= =20 printout  and had the transmission been on QRS 3, I could have read a message several times over on=20= the=20 waterfall display.
73 and HNY de Mal/g3kev
 
 
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