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Date: Sat, 27 Oct 2012 22:57:01 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: JT9: A New Digital Mode for MF and LF
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LF, Roger,

Am 27.10.2012 22:26, schrieb Roger Lapthorn:
> This is exciting news being a 2-way mode, especially as it is 9-FSK,=20
> so doesn't need a linear PA. With bandwidths as small as 0.4Hz for the=20
> long version, no-one will be complaining about how much bandwidth all=20
> this digital stuff takes. Unlike OPERA, the software will be well=20
> documented and open source.
Agreed!

>
> There is a danger that, with too many digital modes now available, the=20
> activity may be spread too thinly, a point Mal raised some time back I=20
> believe Somehow though I suspect JT9 will rapidly become the de-facto=20
> digital mode on 472kHz and 136kHz.
Yes, the spreading effect is already notable. Thus i transmit good old=20
QRSS-60 tonite!

The new mode is certainly a very promising for LF DX for weaker=20
stations. Like we demonstrated with DF6NM's WSPR-32 version, JT9-30=20
should do about the same but is less complex to use.

>
> I hope that one of the internet databases - PSK Reporter I guess, or=20
> perhaps an equivalent to WSPRnet - will be able to display JT9=20
> activity as this was one of the great bonuses with WSPR beaconing.
Joe told that setting up a online map like in WSPR may be done in the=20
future but it takes some time.
He also wants to release an update that allows to set the sound output=20
center frequency to near 24 kHz.

Now it's time for the "i did the first QSO..."-hunters :-)

73, Stefan/DK7FC


>
> I may give it a go on 500kHz next week.
>
> 73s
> Roger G3XBM
>
>
> On 27 October 2012 21:00, Stefan Sch=E4fer=20
> <Stefan.Schaefer@iup.uni-heidelberg.de=20
> <mailto:Stefan.Schaefer@iup.uni-heidelberg.de>> wrote:
>
>     Oh, now Joe has lifted the secret ;-)
>     He released the mode 2 days ago and a first update yesterday.
>
>     Now it really gets complex which mode to choose. WSPR, Opera, JT9...
>     But as a digital mode for LF i gues JT9-30 is the most promising
>     at all.
>
>     73, Stefan/DK7FC
>
>
>
>
> --=20
> http://g3xbm-qrp.blogspot.com/
> http://www.g3xbm.co.uk
> https://sites.google.com/site/sub9khz/
> http://qss2.blogspot.com/
>
>

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LF, Roger,<br>
<br>
Am 27.10.2012 22:26, schrieb Roger Lapthorn:
<blockquote
 cite="mid:CAHAQVWMqHmBZhfEF_h25PsRyOL87uViyKJqg=xgssz+_6WRVdw@mail.gmail.com"
 type="cite">This is exciting news being a 2-way mode, especially as it
is 9-FSK, so doesn't need a linear PA. With bandwidths as small as
0.4Hz for the long version, no-one will be complaining about how much
bandwidth all this digital stuff takes. Unlike OPERA, the software will
be well documented and open source.<br>
</blockquote>
Agreed!<br>
<br>
<blockquote
 cite="mid:CAHAQVWMqHmBZhfEF_h25PsRyOL87uViyKJqg=xgssz+_6WRVdw@mail.gmail.com"
 type="cite"><br>
There is a danger that, with too many digital modes now available, the
activity may be spread too thinly, a point Mal raised some time back I
believe Somehow though I suspect JT9 will rapidly become the de-facto
digital mode on 472kHz and 136kHz. <br>
</blockquote>
Yes, the spreading effect is already notable. Thus i transmit good old
QRSS-60 tonite!<br>
<br>
The new mode is certainly a very promising for LF DX for weaker
stations. Like we demonstrated with DF6NM's WSPR-32 version, JT9-30
should do about the same but is less complex to use. <br>
<br>
<blockquote
 cite="mid:CAHAQVWMqHmBZhfEF_h25PsRyOL87uViyKJqg=xgssz+_6WRVdw@mail.gmail.com"
 type="cite"><br>
I hope that one of the internet databases - PSK Reporter I guess, or
perhaps an equivalent to WSPRnet - will be able to display JT9 activity
as this was one of the great bonuses with WSPR beaconing.<br>
</blockquote>
Joe told that setting up a online map like in WSPR may be done in the
future but it takes some time. <br>
He also wants to release an update that allows to set the sound output
center frequency to near 24 kHz.<br>
<br>
Now it's time for the "i did the first QSO..."-hunters :-)<br>
<br>
73, Stefan/DK7FC<br>
<br>
<br>
<blockquote
 cite="mid:CAHAQVWMqHmBZhfEF_h25PsRyOL87uViyKJqg=xgssz+_6WRVdw@mail.gmail.com"
 type="cite"><br>
I may give it a go on 500kHz next week.<br>
  <br>
73s<br>
Roger G3XBM<br>
  <br>
  <br>
  <div class="gmail_quote">On 27 October 2012 21:00, Stefan Sch&auml;fer <span
 dir="ltr">&lt;<a moz-do-not-send="true"
 href="mailto:Stefan.Schaefer@iup.uni-heidelberg.de" target="_blank">Stefan.Schaefer@iup.uni-heidelberg.de</a>&gt;</span>
wrote:<br>
  <blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Oh,
now Joe has lifted the secret ;-)<br>
He released the mode 2 days ago and a first update yesterday.<br>
    <br>
Now it really gets complex which mode to choose. WSPR, Opera, JT9...<br>
But as a digital mode for LF i gues JT9-30 is the most promising at all.<br>
    <br>
73, Stefan/DK7FC<br>
    <br>
  </blockquote>
  </div>
  <br>
  <br clear="all">
  <br>
-- <br>
&nbsp;<a moz-do-not-send="true" href="http://g3xbm-qrp.blogspot.com/">http://g3xbm-qrp.blogspot.com/</a><br>
  <a moz-do-not-send="true" href="http://www.g3xbm.co.uk">http://www.g3xbm.co.uk</a><br>
  <a moz-do-not-send="true"
 href="https://sites.google.com/site/sub9khz/">https://sites.google.com/site/sub9khz/</a><br>
  <a moz-do-not-send="true" href="http://qss2.blogspot.com/">http://qss2.blogspot.com/</a><br>
  <br>
  <br>
</blockquote>
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