|Subject:||Re: LF: ZEVS|
|From:||Markus Vester <[email protected]>|
|Date:||Sun, 22 Jan 2017 07:38:55 -0500|
|Dkim-signature:||v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1485088736; bh=TAqxTQN6kmctbL81r2H1Df4x/ZOhc05wSUpQk33ZExw=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=WuHJm2o9zMwTDJuPC+g/RHVJ07D/45UUw+BJyvV60sP0R/gSuF2p7co1wRz0lflNp tIt4VFXyXmZJAU+E5hcNt/Zo+pJNrjbF9gaVr/N8wFs45Gv0cgkx6B1/geVHsXFZnG GH8aeIhx63h7gjRFUhxbccqcf6PkmMfL6aUpFRsc=|
to say the truth, I don't know for sure. Eddie G3ZDO used to monitor ZEVS regularly, and a trace was present in June 2016: http://www.g3zjo.talktalk.net/vlfgrabber.htm . On the other hand, Renato's live grabber http://www.vlf.it/cumiana/livedata.html currently shows nothing on 82 Hz (scroll down to "Marconi Antenna + Geophone" ). Last time I looked myself was Sep 2014, and ZEVS was easily captured then on an E-field antenna with a simple FET source-follower.
The classic Stanford paper http://www-ee.stanford.edu/~acfs/82Hz.pdf mentions a fieldstrength measurement in Dunedin, New Zealand at -141 dB A/m (including a 1.5 dB correction for RX antenna orientation), and 13 dB SNR with 2 minute averaging. Assuming E/H = 377 ohm, the fieldstrength would be equivalent to E = 34 uV/m. It may be slightly weaker in Tasmania due to less focussuing gain further from the antipode.
Good luck if you want to try the experiment, I'm curious to learn wether you can find ZEVS down under!
Von: edgar <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Sa, 21. Jan 2017 11:06
Betreff: LF: ZEVS
Is the Zevs transmitter active?
|<Prev in Thread]||Current Thread||[Next in Thread>|
|Previous by Date:||Re: LF: VLF/ULF activity weekend 21th/22th, Wolfgang Büscher|
|Next by Date:||Re: LF: VLF/ULF activity weekend 21th/22th, Markus Vester|
|Previous by Thread:||Re: VLF: EbNaut 8270.1 Hz, DK7FC|
|Next by Thread:||LF: Re: 472kHz JT9 frequencies?, Rik Strobbe|
|Indexes:||[Date] [Thread] [Top] [All Lists]|