Hi Markus !
reading this, thank you for a truly handmade JT9-QSO !
I think this is what they call a "long delayed echo" on shortwave : your
CQ at 22:03h and 22:05h, my anweres at 22:04h and 22:06h, then "some
seconds later" your absolute perfect sequence of answers at 22:18h to
22:24h. I suppose our radiowaves had been travelling to the sun and
beeing bounced back by the outer skirts of the sun-halo, isn't it ?
But it had worked out, and that is what counts. So thank you for a
somewhat special QSO at this fine weekend party !
(BTW : DL3NDR had written a fine modification article for a simple
softrock RxTx at 475kHz. It does work very well.)
73 de dg3lv Tobias
Am 20.03.2016 um 10:22 schrieb Markus Vester:
Thank you Vinny, for the nice idea and the invitation to the party!
For me, it sure was a lot of fun, and resulted in a number of JT9 QSO's
with OR7T, DG0RG, SV8CS, SV3DVO, DL6II, DD2UJ, IW4DXW, LA8AV, F6CNI, and
DK7FC. Most signals were promptly decodable (except for my report from
DL6II which was lost due to temporary drift). A copy of my receive log
is at http://df6nm.bplaced.net/MF/jt9_party_160319.txt .
But operating workflow was not easy for me. I don't have an MF SSB
transmitter available here, just an AD8950 DDS-board with a three-wire
serial interface. So I decided to modify my homemade WSPR software, such
that it reads a message from the command line, converts it to tone
numbers by calling Joe's JT9CODE.EXE, and plays it at the beginning of
the next minute. Lacking the "late-start feature", the text had to be
typed and ready on time, and it was practically impossible to
immediately reply to a decoded message. This was further exacerbated by
the lack of automatic message generation ("three click QSO"),
and some uncertainties of shorthand versus free-text length. I'm sorry
if I have been taxing the patience of my QSO partners!
Regarding the receive software, if I had two free wishes this is what I
would suggest:
- Show decodes as spectrogram labels:
Coming from visual QRSS, I like to "see" who I work. With many stations
in the spectrogram, it can be challenging to keep an oversight on who is
who, and on which frequency. It would be nice to see the decoded
messages as labels near or on the traces in a wide horizontal
spectrogram. replying by clicking on colour-highlighted labels would
seem more intuitive than clicking in the separate text decode window.
- Show partial decodes:
When the signal is not too weak, the software could already attempt to
decode a message before it has been completely received. Decoding zero
padded audio (e.g. two extra times after 30 and 40 seconds) would give
the operator significantly more time to think up an
appropriate (non-automatic) response.
Best 73,
Markus (DF6NM)
*From:* Vincent Stallbaum <mailto:[email protected]>
*Sent:* Saturday, March 19, 2016 10:38 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* LF: JT9 Activity right now
Ufb activity right now with a few new stations in JT9 mode. Feel free to
join the QSO party!
73
Vincent, DL6II
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