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106
> HOW TO TRANSFER EbNaut on USA?

Hi Pavel,

Jay W1VD and others know how to receive EbNaut, but I do not know if anyone is watching now. Maybe you could  announce your transmissions in the rsgb_lf_group at groups.io.

73, Markus

107
The 137477 Hz EbNaut auto-decoder at DL0AO will be started already at 18 UT, two hours earlier than before.
73, Markus

Two sequences from UT7GH were decoded at DF6NM at 19 and 20 UT. Unfortunately DL0AO had a timing problem, it is now fixed.

108
Sorry there was an audio problem at DF6NM, fixed at 19:00 UT. At the same time, the loop antenna at DL0AO was switched from 120° to 70°.

73, Markus


109
UA9UIZ in Bavaria:

DF6NM JN59nj  Opera-32 Deep Search  137.45 - 137.55 kHz  Sa 21.12.2019  8:56
   date      time   call   distance  frequency bandwidth  snr    correlation
2019-12-21 01:34:01 UA9UIZ  4980km 137529.161Hz   3mHz -41.9dBOp 100% 18.8dB
2019-12-21 00:28:34 UA9UIZ  4980km 137529.166Hz   2mHz -39.7dBOp  62% 18.0dB

DL0AO JN59vk  Opera-32 Deep Search   137.45 - 137.55 kHz   21.12.2019 10:04
   date      time   call   distance  frequency bandwidth  snr    correlation
2019-12-21 01:34:03 UA9UIZ  4940km 137529.161Hz   3mHz -40.2dBOp 100% 17.0dB
2019-12-21 00:28:37 UA9UIZ  4940km 137529.171Hz   9mHz -43.6dBOp  87% 16.2dB

73, Markus

110
Thank you Alex for the clear explanations! It helped me better understand the background of all these changes, and I learned a little bit about life in your country.

Actually I did hold DB9UA (VHF only) for a year in 1977/78, before I dared to take the Morse code exam ;-)

73 and all the best,
Markus

111
@ Sergey RA1ADF / UB1APE: The callsign has been updated in my opds search list.

I noticed that Russian amateurs seem to change callsigns relatively often. Is there a special reason for this?

73, Markus (DF6NM since 1978 ;-)

112
Victor UA4AAV: Your stable carrier was visible all the time between 6:00 and 16:31 UT, the exact frequency was 137777.006 Hz.

73, Markus

113
@ Alex & Alex (RN3AUS, R7NT), regarding the symmetrical mirror sidebands from N1BUG around UA4AAV carrier: The source of the nonlinearity could perhaps be an AGC (automatic gain control) in the receiver, or in SpecLab software. The beat pattern between the closely spaced signals is slow enough to let it periodically change the gain, resulting in an unwanted AM modulation of the strong signal.

73, Markus

114
Pavel, perfect phase pattern from your 22 UT transmission.

EbNaut-RX DF6NM JN59NJ  (active 20-8 UT, 137477 Hz)
start date and time  frequency  char symb  code crc Eb/N0c Eb/N0s rank message
------------------------------------------------------------------------------
2019-12-17 22:00:00 137477.000Hz  7  3.0s  8K19A 16 12.0dB 14.5dB    0 *UT7GH*
2019-12-17 21:00:00 137477.000Hz  7  3.0s  8K19A 16  9.4dB  8.6dB    0 *UT7GH*

73, Markus

115
Updated versions of the software and the script for direct EbNaut generation with a u-blox GPS device have been uploaded:
http://df6nm.bplaced.net/LF/u-blox_ebnaut/setubx2.zip

73, Markus

116
The plot.

117
Congratulations Pavel! Here are the decoder log and the symbols plot.

73, Markus


118
Success for UT7GH!

EbNaut-RX DL0AO JN59VK (active 137477 Hz)
start date and time  frequency  char symb  code crc Eb/N0c Eb/N0s rank message
------------------------------------------------------------------------------
2019-12-08 22:00:00 137477.000Hz  7  3.0s  8K19A 16  3.3dB  3.3dB    0 C VO1NA
2019-12-08 21:00:00 137477.000Hz  7  3.0s  8K19A 16  5.4dB  4.4dB    0 UT7GH**

Best 73,
Markus

119
It looks like someone is trying to generate EbNaut on Joe's frequency 137477 Hz. UT7GH?

73, Markus

120
Albrecht DL7NN is also transmitting MF between LF sequences. This means that he can either automatically switch coils in a few seconds, or uses a double-resonant antenna.

73, Markus

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