Very nice Paul!
I hope i can generate a peak outcoming of the noise in the picture ;-)
Yesterday i have got a PVC tube with 25cm diameter and 2m long. Additionally i
have bought 0,4mm diameter enameled copper wire, abt 6km in one piece (i can
give back the rest). So today i try to wind the big L, abt 540mH! Than, the
internal R will be abt 350 Ohm, not less but no problem. As said, the limiting
factor will be the voltage at the wire...
73, Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von Paul Nicholson
Gesendet: Sa 06.03.2010 08:27
An: [email protected]
Betreff: Re: AW: LF: Re: 9kHz noise level
Stefan wrote:
> I plan to transmit on 8,9700 kHz...
> during the test i make QSY of some Hz if the RXing station
> has a carrier/line on this QRG.
Here's a live spectrum for 8970 +/- 1Hz - resolution is 5mH.
Amplitude calibration is only within a factor of two or so.
http://abelian.org/vlf/nb.shtml
> do you know other members in the VLF group who live near
> frankfurt?
Ich habe die Frage gestellt.
--
Paul Nicholson
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