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Its all down to power S .. the bigger the
signal (rx end) the faster you can go
with the 'very' long qsb , the
interleave (FEC) time has to be able
to bridge the gap in the signal , so
you will always have a long , start
and finish time , for any robust mode
amtor-fec may offer a better link , but
again , there is a lock up time and s/n level
is higher that the multi tone modes
unfortunately there is no
way round the power/range /time aspect
G,,
Sent: Wednesday, March 13, 2013 2:53 PM
Subject: Re: LF: 630m Narrow Keyboard Mode
Hi Eddie, LF/MF,
I'm a bit confused in the last days by
the number of various digimodes which have been tested. Gary started with RTTY
which is fun and allows real QSOs on 630m, apart from CW. But if each mode is
done as a short test to check its performance, then it quickly becomes boring.
What i would like to have is a mode which is used by several active amateurs, a
real QSO mode like CW. A mode that lasts longer than a day. I thought that
AMTOR-FEC could be useful but i didn't make any tests yet. However if i have to
assume that there will be 2 or 3 interested QSO partners who will be available
for a short test QSO and then QSY to GADFDSMSFASKMDKFK-4 or whatever, then none
of these modes are actually interesting for me and i come back to CW where i can
be sure to find a QSO partner without announcing my activity before. Today,
tomorrow, next week and next year :-)
What do you suggest? :-)
73,
Stefan/DK7FC
PS: And where is Mal? :-)
Am 11.03.2013 23:52,
schrieb g3zjo:
Sucess.
Just a little more signal and this would have been
a really good QSO over our path of 127Km conditions are not good tonight, my
antenna current is down.
Eddie
On 11/03/2013 21:53, g3zjo wrote:
LF
Searching for a Narrow Keyboard QSO
mode suitable for QRP on 630m. I went back to a program I used several years
ago.
Currently Testing GMFSK not to be confused with gMFSK which is a
Linux program.
GMFSK is an FSK Mode using Varicode by JE3HHT Makoto
Mori included in MMVari.not new program it is of the usual high standard
found in his software.
GMFSK has variable width, currently I am
running at 15.625Hz wide. 474.200 Dial 1900 tone frequency.
JE3HHT
provides fine documentation with his software, for some reason all the other
modes covered by MMVari are well covered but when he
gets to GMFSK he says that it is beyond the scope
of the instructions. I have yet to find more details about the mode.
This Mode should be
better than RTTY and faster MFSK for higher power stations
too.
73 Eddie
G3ZJO
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