Re: LF: VO1NA 137477 Hz

[Markus Vester <markusvester@aol.com>]

This week the EbNaut autodecoders at DL0AO and DF6NM have been refurbished, producing more compact output with one line for each successful decode. My current script and required utilities are here:
http://df6nm.bplaced.net/VLF/fec_tests/ebnaut_autodecode_scripts.zip

Our autodecoders are currently observing 137477 Hz. Until yesterday, VO1NA has been making strong and consistent decodes every night. Today I'm doing a few of low-power daytime tests on his QRG, with the LEA-6T barefoot to the antenna.

Best 73,
Markus (DF6NM)


-----Ursprüngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Sa, 22. Dez 2018 14:55
Betreff: LF: VO1NA 137477 Hz

Hi Joe,

the carrier on your frequency is nicely visible night and day. When the signal is strong, some symmetrical sidebands become visible, are you still modulating with 7 char EbNaut messages every other half hour? 

I've placed my current autodecoder scripts here
but note that this setup is driven by opds and sort of specific to my LF grabber. For Linux, you may want to start from the scripts which Domenico has recently posted.

Best 73,
Markus (DF6NM)



-----Ursprüngliche Mitteilung-----
Von: jcraig <jcraig@mun.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mo, 17. Dez 2018 22:53
Betreff: Re: LF: EbNaut 137.542 kHz

Hi Markus, Stefan EbNauters,

Thanks for the reports and autodetectors.  The TX carrier is on
continuously at 50 watts with the excitation XOR phase inverted
by Paul's Ebkey.c on a raspi3.

There have been some daytime decodes recently.

Is the autodetect easy to set up?  If not perhaps I'd best
review the advice from you and Stefan again.

73
Joe