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, 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.
Agreed!
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.
Yes, the spreading effect is already notable. Thus i transmit good old
QRSS-60 tonite!
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.
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.
Joe told that setting up a online map like in WSPR may be done in the
future but it takes some time.
He also wants to release an update that allows to set the sound output
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 Schäfer <[email protected]>
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
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
https://sites.google.com/site/sub9khz/
http://qss2.blogspot.com/
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