Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh03.r1000.mx.aol.com (Internet Inbound) with ESMTP id ADD5B38000081; Tue, 10 Jan 2012 14:36:34 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RkhTe-0006OF-Rf for rs_out_1@blacksheep.org; Tue, 10 Jan 2012 19:35:22 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RkhTe-0006O6-1L for rsgb_lf_group@blacksheep.org; Tue, 10 Jan 2012 19:35:22 +0000 Received: from mail-we0-f171.google.com ([74.125.82.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RkhTa-0000e2-QQ for rsgb_lf_group@blacksheep.org; Tue, 10 Jan 2012 19:35:22 +0000 Received: by werg1 with SMTP id g1so6885905wer.16 for ; Tue, 10 Jan 2012 11:35:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=6eIotSQK0a3UZgYyZB4QukN3R5kgUexEW924wnvOWk4=; b=PsrMrvNB3oRGkrNh+NV0ELc7IDkg3vIncc6pUmxmOaC43vyBXi0ou6Cend2jMdxuZp p5SvyDms2ow7IWTKvFFiJIxvXnAa2hvM+//+Z1HNo488j71u0RevMuOVP3OOx85TwtDN 5QJBYmlHZv9PDjT3WSPpMXmrEMZyZm3FTCXvA= MIME-Version: 1.0 Received: by 10.216.138.27 with SMTP id z27mr10015094wei.32.1326224111994; Tue, 10 Jan 2012 11:35:11 -0800 (PST) Received: by 10.180.77.107 with HTTP; Tue, 10 Jan 2012 11:35:11 -0800 (PST) In-Reply-To: <003801cccfc4$e8a35660$0401a8c0@xphd97xgq27nyf> References: <003801cccfc4$e8a35660$0401a8c0@xphd97xgq27nyf> Date: Tue, 10 Jan 2012 19:35:11 +0000 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: opera 137 beacon going Content-Type: multipart/alternative; boundary=0016e6d7ec2c16888f04b6319d7a 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_FONTCOLOR_UNSAFE,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-SCOLL-SCORE: 1:2:490160480:93952408 X-AOL-SCOLL-URL_COUNT: 1 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m270.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d41174f0c9342466a X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0016e6d7ec2c16888f04b6319d7a Content-Type: text/plain; charset=ISO-8859-1 Mal Agreed about working VK/ZL on any HF band with CW and moderate power. However, WSPR, JT65HF, QRSS and OPERA (as examples of weak signal modes) demonstrate that it is possible to communicate over such distances regularly with next to no power at all: people are *regularly* working HF intercontinental DX, or getting amazing beaconing reports, with just a few milliwatts or even microwatts thanks to these new modes. WSPR has certainly proved its worth on MF and LF for me beyond any doubt and there is rarely a day when a few watts does not get me a 10m WSPR report from Australia; at times just 5mW is enough with my small Homebase10wire halo. Now whether this digitally assisted communications is more satisfying (or cleverer) than working ZL with 100W on 20wpm CW on an HF band I cannot judge. As much as I enjoy modes like WSPR, there is little to compare with working DX with a 500mW of CW from a simple homebrew transceiver and antenna. There is still plenty of HF CW thank goodness. All the best and 73s Roger G3XBM On 10 January 2012 18:23, mal hamilton wrote: > Graham > I can work ZL on 10 Mhz on CW frequently and on 160 metres and on any band > 160 - 10 metres. no doubt it is interesting to experiment with data but it > is so easy on CW for those who know how to hammer the old key. > > > de mal/g3kev > > ----- Original Message ----- > From: "Graham" > To: > Sent: Tuesday, January 10, 2012 4:27 PM > Subject: Re: LF: opera 137 beacon going > > > > Amazing , day 10 , ZL> EU decodes on HF 10Mhz and a beacon on > 136 > > will take a look for you later Andy > > Tnx -G > > > > > > > > -------------------------------------------------- > > From: "Andy Talbot" > > Sent: Tuesday, January 10, 2012 4:06 PM > > To: > > Subject: LF: opera 137 beacon going > > > > > Having had to modify a 137kHz source to be able to generate on-off > > > keying, I'm transmitting a signal using 2.048s symbol mode on 137420Hz > > > 33% duty cycle (for now) > > > > > > This is based around my PIC generator for the mode > > > Details at http://www.g4jnt.com/PIC_Opera_Source.pdf and > > > http://www.g4jnt.com/OperaBeacon.zip > > > > > > As its an independent source, with no PC in the Tx chain - no IP > > > packets will be sent to t'web showing the details > > > > > > and its definitely gettign out.... > > > > > > 15:46 136 G8IMR de F6CNI Op8 391 km -28 dB in 136 kHz dial nr Paris > > > > > > > > > Andy > > > G4JNT > > > > > > > > -- http://qss2.blogspot.com/ http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk https://sites.google.com/site/sub9khz/ --0016e6d7ec2c16888f04b6319d7a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mal

Agreed about working VK/ZL on any HF band with CW and moderate p= ower.

However, WSPR, JT65HF, QRSS and OPERA (as examples of weak si= gnal modes) demonstrate that it is possible to communicate over such distan= ces regularly with next to no power at all: people are regularly wor= king HF intercontinental DX, or getting amazing beaconing reports, with jus= t a few milliwatts or even microwatts thanks to these new modes. WSPR has c= ertainly proved its worth on MF and LF for me beyond any doubt and there is= rarely a day when a few watts does not get me a 10m WSPR report from Austr= alia;=A0 at times just 5mW is enough with my small Homebase10 wire halo. Now wh= ether this digitally assisted communications is more satisfying (or clevere= r) than working ZL with 100W on 20wpm CW on an HF band I cannot judge.

As much as I enjoy modes like WSPR, there is little to compare with wor= king DX with a 500mW of CW from a simple homebrew transceiver and antenna.= =A0 There is still plenty of HF CW thank goodness.

All the best and = 73s

Roger G3XBM


On 10 January 2012 18= :23, mal hamilton <g3kevmal@talktalk.net> wrote:
Graham
I can work ZL on 10 Mhz on CW frequently and on 160 metres and on any band<= br> 160 - 10 metres. no doubt it is interesting to experiment with data but it<= br> is so easy on CW for those who know how to hammer the old key.


de mal/g3kev

----- Original Message -----
From: "Graham" <g8f= zk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@black= sheep.org>
Sent: Tuesday, January 10, 2012 4:27 PM
Subject: Re: LF: opera 137 beacon going


> Amazing =A0, day =A010 =A0, ZL> EU =A0decodes =A0on HF =A0 10Mhz = =A0and a beacon =A0on 136
> will =A0take a =A0look =A0for =A0you =A0later =A0Andy
> Tnx -G
>
>
>
> --------------------------------------------------
> From: "Andy Talbot" <andy.g4jnt@gmail.com>
> Sent: Tuesday, January 10, 2012 4:06 PM
> To: <rsgb_lf_group@= blacksheep.org>
> Subject: LF: opera 137 beacon going
>
> > Having had to modify a 137kHz source to be able to generate on-of= f
> > keying, I'm transmitting a signal using 2.048s symbol mode on= 137420Hz
> > 33% duty cycle (for now)
> >
> > This is based around my PIC generator for the mode
> > Details at =A0 http://www.g4jnt.com/PIC_Opera_Source.pdf =A0and<= br> > > http://www.g4jnt.com/OperaBeacon.zip
> >
> > As its an independent source, with no PC in the Tx chain - no IP<= br> > > packets will be sent to t'web showing the details
> >
> > and its definitely gettign out....
> >
> > 15:46 136 G8IMR de F6CNI Op8 391 km -28 dB in 136 kHz dial nr Par= is
> >
> >
> > Andy
> > G4JNT
> >
>





--
http://qss2.blogspot.com/
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
https://sites.google.com/site/sub9khz/

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