[600MRG] [rsgb-lf-group] SlowJT9 update (v0.9.14.0)

[Rik Strobbe]

?Hello Neil, Roger, all,


frequency stability will be a very important issue for JT9-10, the combined TX and RX drift should be less than 0.1Hz per minute.

And even then ionospheric instabilities can ruin it all.


73, Rik  ON7YD - OR7T


________________________________
Van: Roger Graves <ve7vv at shaw.ca>
Verzonden: dinsdag 8 januari 2019 7:54
Aan: Neil Klagge
CC: 600MRG at mailman.qth.net; paul at n1bug.com; Rik Strobbe
Onderwerp: Re: [600MRG] [rsgb-lf-group] SlowJT9 update (v0.9.14.0)

Hi Neil.

I turned on my RX when I saw your email. It decoded your next sequence.
0640 -18 -0.6 411 X 1W JT10 W0YSE

I will leave my RX running overnight.

73,
Roger

On Jan 7, 2019, at 10:17 PM, Neil Klagge <w0yse at msn.com<mailto:w0yse at msn.com>> wrote:

I downloaded and installed v0.9.14 setup and also the zip (using the same procedure as we have been doing)

Running JT9-10 on main pc at 410 hz offset, Rxing on second radio/pc but the RX pgm will not decode this mode.

Will let the bcn run tonight and hope someone can decode it. (txing on first cycle, dial at 474.2 khz)

73
Neil, w0yse, CN85rq
Vancouver, WA

My ham radio website: http://w0yse.webs.com/
<http://wg2xsv.webs.com/>
My Faith website: http://neilsfaith.webs.com/
________________________________
From: 600mrg-bounces at mailman.qth.net<mailto:600mrg-bounces at mailman.qth.net> <600mrg-bounces at mailman.qth.net<mailto:600mrg-bounces at mailman.qth.net>> on behalf of N1BUG <paul at n1bug.com<mailto:paul at n1bug.com>>
Sent: Monday, January 7, 2019 6:08 AM
To: rsgb-lf-group at groups.io<mailto:rsgb-lf-group at groups.io>; rsgb_lf_group at blacksheep.org<mailto:rsgb_lf_group at blacksheep.org>; 600MRG at mailman.qth.net<mailto:600MRG at mailman.qth.net>
Subject: Re: [600MRG] [rsgb-lf-group] SlowJT9 update (v0.9.14.0)

Hello Rik, all,

I look forward to doing a JT9-5 vs JT9-10 test.

My station is off the air for a couple of days with minor technical
problems. Also there is some bad weather coming. Probably I can
begin testing JT9-10 by the end of the week.

73,
Paul N1BUG



On 1/7/19 7:53 AM, Rik Strobbe wrote:
> Dear all,
>
> Beta-release v0.9.14.0 of SlowJT9 has been uploaded, see http://www.472khz.org/SlowJT9/.
>
> Changes:
> -JT9-10 mode added.
> - Waterfall speed will adapt to selected JT9 submode.
> - Any (reasonable) value can be entered for tone spacing (allowing flexible frequency dividing of the modulated signal).
> - Lower frequency limit dropped to 200 Hz (was 400 Hz).
> - Option to discard the audio frequency limits added (Settings -> Mode).
>   In that case the TX boundaries will be 100 - 4980 Hz regardless of the JT9 submode.
>   The RX boundaries however will still be limited by the resampling process:
>   JT9-1: 100 - 4980 Hz
>   JT9-2: 100 - 2240 Hz
>   JT9-5: 100 - 840 Hz
>   JT9-10: 100 - 415 Hz
> - Non fatal bug fixed that skipped PTT handling in the first TX cycle after 'Halt TX' was pressed.
>
> Bug reports, remarks and suggestions are welcome.
>
> 73, Rik  ON7YD - OR7T
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