Re: ELF: ZEVS back on air

[VIGILANT Luis Fernández <luis@vigilant.es>]

Thank you Wolf

False positive confirmed !

Explanding the spectrogram found a signal at every Hz :-(

Local noise, but accurate in frequency

73 de Luis

EA5DOM

El 28 may. 2017 2:36 p. m., Wolfgang Büscher <dl4yhf@freenet.de> escribió:

Hi Luis,

I have some old VLF spectrograms which clearly show the ZEVS FSK. Scroll down a few pages on this site:

http://dl4yhf.darc.de/t/vlf_experiments.htm

73,
 Wolf DL4YHF .

Am 28.05.2017 um 13:59 schrieb VIGILANT Luis Fernández:

Signal dissapeared. Modulating FSK ?

Need another grabber to confirm

73 de Luis

EA5DOM

El 28 may. 2017 1:00 p. m., VIGILANT Luis Fernández <luis@vigilant.es> escribió:

Hi VLF

Just a try here ...... and there is a trce at 954uHz ! :-O

Spectrogram added to the bottom of my grabber

https://ea5dom.ure.es/grabber/index.html

73 de Luis

EA5DOM

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De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] en nombre de Markus Vester [markusvester@aol.com]
Enviado: domingo, 28 de mayo de 2017 7:21
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: ELF: ZEVS back on air

Wow Edgar, that's impressive! SNR about 25 dB in 0.16 mHz, presumably on an E-field antenna? You might add another data point to Fig 2 in http://ee.stanford.edu/~acfs/82Hz.pdf , showing an antipodal focussing effect. Can you possibly calibrate the signal level? It may be interesting to observe a possible day/night change.

Best 73
Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: edgar <edgarjtwining@virginbroadband.com.au>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Sa, 27. Mai 2017 23:49
Betreff: Re: ELF: ZEVS back on air

Hi Markus,

Someone from the other side of the world can see it too!

     

Regards, Edgar
Moonah, Tasmania.