Re: ELF: Zevs

[Roger Lapthorn <rogerlapthorn@gmail.com>]

Stefan

It is always good to have too many ideas and projects. It shows you have plenty of enthusiasm and drive!

73s
Roger G3XBM

2011/5/5 Stefan Schäfer <schaefer@iup.uni-heidelberg.de>

Hmm, well.... I've done some tests on 1970 Hz and haven't come very far. Just a poor signal in 5 km distance. But the QRM is very high there. I think in your utilities assisted earth mode i will work some km. Would be interesting about a QRO test ;-) I could use my LF TX antenna and ground it at the far end, i would achieve a loop with 2700 m^2 but even that wouldn't be enough to reach the next amateur station i think.
To many projects in the moment, like building up the LF stn and improving the RX and so on. But maybe i'll go back to 1970 Hz if i can do some better local tests on the earth antenna...

73, Stefan

PS: Sounds like i become old? No! ;-)

Am 05.05.2011 20:29, schrieb Roger Lapthorn:

If you use your earth electrode antenna Stefan you will not need the coil. Try it and see how far it gets at this much lower frequency?

73s
Roger G3XBM

2011/5/5 Stefan Schäfer <schaefer@iup.uni-heidelberg.de>

Markus,

If you wind the coil, i'll try it!

Ah, BTW, a simple mains transformer would do the job! Driven by the H bridge and SL as the driver. Trivial ;-)

73, Stefan

Am 05.05.2011 18:44, schrieb Markus Vester:

Hi Stefan,

 

that window looks like a challenge for your transmit earth antenna as well ;-)

Best 73,

Markus

-----Ursprüngliche Mitteilung-----
Von: Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>
An: rsgb_lf_group@blacksheep.org
Verschickt: Do., 5. Mai. 2011, 18:05
Thema: Re: ELF: Zevs

Hi Eddie, Daniele, ELF ;-)

My temporarely window is running here http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
Curious if i'll get a trace tomorrow morning...

73, Stefan

 

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