Hello to Italy :-)
That's funny, we are now side by side in 5 Hz steps. With 4K19A, the
occupied bandwidth should be very small. I listen to the signal with a
TECSUN PL-660er with its built in ferrite antenna.
Unfortunately we can't give us reports to each other ;-)
A lot of work for the RX stations :-) And challenges!
73, GL all,
Stefan
PS: Also got an EbNaut decode from K3SIW last night. He's going to
listen again this night, so there are chances for nearly 8000 km
distance?
Am 16.01.2019 21:52, schrieb Riccardo Zoli:
Hi LF & EbNauters.
Ok, Stefan and Domenico: I'll join you with the same
transmission coding and parameters on 137.535 kHz (message
repeated hourly, 1st on 2100z, last on 0700z).
Reports are welcome.
All the best
73 de Riccardo IW4DXW
LF,
I will transmit a 4 character message with EbNaut on 137.540
kHz, sym=8s, code=4K19A, CRC=16.
Transmissions will start on 2019-01-16 22.00 UTC with a
duration of 30' 56''; then repeated every hour. Last transmission on
2019-01-17 06:00.
TX setup in use: Paul N. Program 'EbSynth' steered with 10 kHz
from GPS, analog SSB exciter with reference oscillator steered by the
same GPS, 'gpds' and 'chrony' programs for controlling the UTC time of
the computer.
Antenna current = 1.5 A, antenna type rev-L 8+8 meters.
Reports are welcome.
73, Domenico IZ7SLZ / JN80nu
Hello Stefan and LF,
Attached to this email there is a folder with the plots of
the eight periods. First two transmissions seems to be affected by
fading.
I want to join your EbNaut session tonight with some
transmissions from my side. I will announce the parameters as soon the
setup is ready.
73, Domenico IZ7SLZ
Hello Rob and Jay,
Many thanks for the reports and all the details. Jay, did you miss the
22 UTC transmission or did it not decode?
Interesting to see the phase plots. It is expected that the phase is
less stable when the band opens. In the last transmission, the Eb/N0 is
not high enough to see the phase pattern.
I wonder if the traces become more evident if 4K19 is used.
What happens when a solar event happens during the transmission time?
Does it change the phase or just the D layer attenuation?
Maybe we can repeat the experiment, using 4K19A. Of course a carrier
could be used too, but i like to 'play' with EbNaut.
So, tonite:
f = 137.545 kHz
Start time: 16.JAN.2019 22:00:00.3 UTC
Symbol period: 8 s
Characters: 4
CRC bits: 16
Coding 4K19A
Antenna current: 4 A
Duration: 30:56 [mm:ss]
73, Stefan
Am 16.01.2019 12:29, schrieb Rob Renoud:
Stefan,
Late start but 7 successful decodes. Have not gotten to
phase
plots yet...
| UTC |
Rank |
C
Eb/N0 |
Eb/N0 |
MSG |
Ref
Phase |
| 0100 |
0 |
5.6 |
1.6 |
2019 |
0,-30,0 30 |
| 0200 |
0 |
6.9 |
0.4 |
2019 |
60,30 30 0 |
| 0300 |
0 |
9.9 |
5.8 |
2019 |
90,60,60,0 |
| 0400 |
0 |
11.2 |
8.8 |
2019 |
180,180,150,150 |
| 0500 |
0 |
6.3 |
2.7 |
2019 |
0,-30,-30,-60 |
73,
Rob – K3RWR
Sent: Tuesday, January 15, 2019 9:33 PM
Subject: Re: LF: Re: EbNaut tonite
LF,
Today, the messages will be transmitted as announced, starting 22 UTC
73, Stefan
Am 14.01.2019 22:16, schrieb DK7FC:
PS:
Repeatinh hourly, until including 6 UTC.
Am 14.01.2019 22:13, schrieb DK7FC:
Hi
LF,
Just a short EbNaut message tonite. I'm interested to see the phase
changes on a long path. Markus's showrawsyms does a good job there, as
long as 8K19A is used. A shorter message should also help to build up a
clear trace.
So let's try an unusual short message:
f = 137.545 kHz
Start time: 14.JAN.2019 22:00:00.3 UTC
Symbol period: 4 s
Characters: 4
CRC bits: 16
Coding 8K19A
Antenna current: 4 A
Duration: 30:56 [mm:ss]
Reports, including phase plots, welcome :-)
73, Stefan
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