Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wAB8KQZv016496 for ; Sun, 11 Nov 2018 09:20:28 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gLkrX-0006rp-WC for rs_out_1@blacksheep.org; Sun, 11 Nov 2018 08:12:55 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gLkrN-0006rg-JS for rsgb_lf_group@blacksheep.org; Sun, 11 Nov 2018 08:12:45 +0000 Received: from mail-ed1-x531.google.com ([2a00:1450:4864:20::531]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gLkrK-0007Ga-MU for rsgb_lf_group@blacksheep.org; Sun, 11 Nov 2018 08:12:44 +0000 Received: by mail-ed1-x531.google.com with SMTP id c25-v6so4925667edt.8 for ; Sun, 11 Nov 2018 00:12:42 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=9x/k6CfOypJuDLVC/vzKey1mN4VPxgvvZaNpi8i9YeE=; b=C6L3vqd3KRuxwi1ZtvvZjP7tGvRX2VrCvvUH7MPs2vXvTGGpBkAuZweKmFc7VTi5WP JEdpHnOq6RbsYhBLlUUc8Uqg85HPmW0sBtXwLKEWmb2b4ucEpuUs1lK0+CQ9u68u2qpA uBmImm41nG7Rjr8GcEaJAn7I3cT9dEWEyEBbsjGlvZQJpLu9ZY0y5CC4T/TLndciRHGH fm36KKZwpZg3DxpfSCz/Xl7yX7zCuH6HL936OazsNwZg/kObcohHBsFu34L2gagbRVAj uSOaTltQVnJhnroogzX89nKBcuMs1+4c3lmZsHqoJwqAFaP3L98WQnG8QcBOK8c+n0xt xYXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=9x/k6CfOypJuDLVC/vzKey1mN4VPxgvvZaNpi8i9YeE=; b=LAyCM+PNRscjOB1uUhN/elhyEQDP0bE+EjF9ymd2eMG7ORuwJuLkhItuqQABCUw4Mu 8Dr7wkFHGit980hqk1tgwZkfB7egkIiocA0I+naMVGrbzaEZ/Qp8owvzVIM8Nn4EoyEh kzPK93pYBnjcVB//47pDF/79sGlpbJWHK2mf2w8B6wvX+hk+TrX5EsY3I8pNmPqQ/NNX G01prYO41dCzXI4iutfM1ZZ7qzdeKhdR2bwFSjDbULKf5jL9NMlgTVuP6lNwM06wKuZw vgiKva3Kt4yKkEolpMni+1t61ddadEs/LZHwqxlQBj8wmaNVgotdv+6t9gYFqyFbSRlp 4hJg== X-Gm-Message-State: AGRZ1gI80VmHh7lVnRVum5N2NkNyHlW1AjgPYJKhF6/B4CsSy464CF1t AwH5M6kWCgkUeGcZGGqGezayj2KRhztj+NGEPw+ApA== X-Google-Smtp-Source: AJdET5fQ9p5rhD99+beG34rqyPonbO2nlyclIUFCNbtMw/MMmNNa/CexUtWXAJZ97gmp1B2J2fPbMcT3RA/sr+GZ65E= X-Received: by 2002:a17:906:3548:: with SMTP id s8-v6mr6264541eja.161.1541923960199; Sun, 11 Nov 2018 00:12:40 -0800 (PST) MIME-Version: 1.0 References: <1541712573053.31739@kuleuven.be> In-Reply-To: <1541712573053.31739@kuleuven.be> From: Riccardo Zoli Date: Sun, 11 Nov 2018 09:12:27 +0100 Message-ID: To: LF Group X-Spam-Score: 0.3 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hi Rik, all. The application works fine here, Rik! Thank you for your good work. I only encountered difficulties adjusting input and output VAC level toward PowerSDR software (TX power slide has no effect and Windows mixer seems bypassed in the VAC settings, so the audio remains at max level). I'll QRV JT9-1/2/5 LF in the evening. Thanks to Stefan, DK7FC, for the QSO JT9-1 from last night ;-) [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:531 listed in] [list.dnswl.org] 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (riccardozoli80[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (riccardozoli80[at]gmail.com) 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: 7ee575a0a6578bbbbe5ea7af32688fd5 Subject: Re: LF: JT9-2 and JT9-5 mode application Content-Type: multipart/alternative; boundary="000000000000eb20da057a5f257e" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS,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 --000000000000eb20da057a5f257e Content-Type: text/plain; charset="UTF-8" Hi Rik, all. The application works fine here, Rik! Thank you for your good work. I only encountered difficulties adjusting input and output VAC level toward PowerSDR software (TX power slide has no effect and Windows mixer seems bypassed in the VAC settings, so the audio remains at max level). I'll QRV JT9-1/2/5 LF in the evening. Thanks to Stefan, DK7FC, for the QSO JT9-1 from last night ;-) All the best 73 de Riccardo IW4DXW Il giorno Gio 8 Nov 2018, 22:33 Rik Strobbe ha scritto: > Dear all, > > > a few months ago there was a short discussion about a "revival" of the > slower JT9 modes such as JT9-2 and JT9-5. > > These modes existed in early versions of WSJT-X, and had the advantage of > a better S/N treshold level, at the cost of longer transmissions. But > unfortunately thse modes were abandoned in later WSJT-X version. > > As a result I raised this question in de WSJT-X developers group, but > there was no intention do implement these modes again, as the focus was > more on the (further) developing of new(er) modes. > > Having a closer look at the WSJT-X source code I noticed that the > JT9 decoding was done in a separate executable and with some assistance of > Joe, K1JT, I managed to write an application that used this executable for > decoding. > > As this executable only decodes JT9 signals, not JT9-2 and JT9-5, I had to > use a lttle trick: speeding up a JT9-2 recording by a factor 2 results in a > JT9 signal (at the double frequency) that can be fed to the JT9 decoder. > The same can be done for JT9-5 (now speeding it up 5 times). > > Some tests showed that this way a JT9-2 signal could be copied at a 2.5dB > better S/N treshold compared to JT9(-1). Not completely the theoretical > 3dB, but 2.5dB can often be the difference between a failed or successful > QSO. JT9-5 hasn't been tested yet. > > All this was done "manually" and it was rather time consuming. > > So I decided to write an application that I named SlowJT9. It takes care > of all the conversions and frequency shifts. > > Besides JT9-2 and JT9-5 it also supports JT9(-1) for convenience reasons. > > Over the past weeks I tested the application in JT9 mode and after more > than a dozen QSO's I feel that it now time to release a beta version. > > > Whoever is interested can download the SlowJT9 installation file at > http://472khz.org/SlowJT9/SlowJT9_setup.exe. > > > For now only a Windows version of SlowJT9 is available. But as the used > IDE has cross platform facilities it should be possible to support other > operating systems as well in the future. > > The aim of this beta version is: > - To test if the application is working properly. > - To find out if JT9-2 and/or JT9-5 have a sufficient S/N advantage over > JT9(-1). > - To find out if there is sufficient interest in using these modes to > continue the project. > Therefore all comments, bug reports and suggestions are most welcome via > the Blacksheep RSGB LF Reflector, Yahoo RSGB LF Group or directly at > on7yd@strobbe.org. > > 73, Rik ON7YD - OR7T > > > > > > > > --000000000000eb20da057a5f257e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hi Rik, all= .

The application works = fine here, Rik! Thank you for your good work.
I only= encountered difficulties adjusting input and output VAC level toward Power= SDR software (TX power slide has no effect and Windows mixer seems bypassed= in the VAC settings, so the audio remains at max level).
I'll QRV JT9-1/2/5 LF in the evening.
Than= ks to Stefan, DK7FC, for the QSO JT9-1 from last night ;-)

All the best

=

73 de Riccardo IW4DXW






Il giorno Gio 8 = Nov 2018, 22:33 Rik Strobbe <rik.strobbe@kuleuven.be= > ha scritto:

Dear all,


a few months ago there was a short discussion about a "revival"= ; of the slower JT9 modes such as JT9-2 and JT9-5.

These modes existed in early versions of WSJT-X,=C2=A0and had the advant= age of a better S/N treshold level, at the cost of longer transmissions. Bu= t unfortunately thse modes=C2=A0were abandoned in later WSJT-X version.

As a result I raised this question in de WSJT-X developers group, but th= ere was no intention do implement these modes again, as the focus was more= =C2=A0on the (further)=C2=A0developing=C2=A0of=C2=A0new(er) modes.

Having a closer look at the WSJT-X source code I noticed that the JT9=C2= =A0decoding was done in a separate executable and with some assistance of J= oe, K1JT, I managed to=C2=A0write an application that=C2=A0used this execut= able for decoding.

As this executable only decodes JT9 signals, not JT9-2 and JT9-5, I had = to use a lttle trick: speeding up a=C2=A0JT9-2 recording by a factor 2 resu= lts in a JT9 signal (at the double frequency) that can be fed to the JT9 de= coder. The same can be done for JT9-5 (now speeding it up 5 times).

Some tests showed that this way a JT9-2 signal could be copied at a 2.5d= B better S/N treshold compared to JT9(-1). Not completely the theoretical 3= dB, but 2.5dB can often=C2=A0be the difference between a failed or successf= ul QSO. JT9-5 hasn't been tested yet.

All this was done "manually" and it was rather time consuming.=

So I decided to write an application that I named SlowJT9. It=C2=A0takes= care of all the conversions and frequency shifts.

Besides JT9-2 and JT9-5 it also supports JT9(-1) for convenience reasons= .

Over the past weeks I tested the application in JT9 mode=C2=A0and after = more than a dozen QSO's I=C2=A0feel that it now time to release a beta = version.


Whoever is interested can download the SlowJT9=C2=A0installation file=C2= =A0at=C2=A0http://472khz.org/SlowJT= 9/SlowJT9_setup.exe.


For now only a Windows version of=C2=A0SlowJT9=C2=A0is available. But as= the used IDE has cross platform facilities it should be possible to suppor= t other operating systems as well in the future.

The aim of this beta version is:
-=C2=A0To test if the application is working properly.
-=C2=A0To find out if JT9-2 and/or JT9-5 have a sufficient S/N advantage ov= er JT9(-1).
-=C2=A0To find out if there is sufficient interest in using these modes to = continue the project.
Therefore all comments, bug reports and suggestions are most welcome via th= e Blacksheep RSGB LF Reflector, Yahoo RSGB LF Group or directly at=C2=A0on7yd@strobbe.org.

73, Rik=C2=A0 ON7YD - OR7T







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