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LF: ELF

from [mal hamilton] [Permanent Link][Original]
To: "rsgb" <[email protected]>
Subject: LF: ELF
From: "mal hamilton" <[email protected]>
Date: Sat, 28 May 2011 16:47:21 +0100
Reply-to: [email protected]
Sender: [email protected]
ELF
I have been observing the spectrum 0 - 200 Hertz.
 
Very clear area from  0 - 42 Hz
 
Carrier at 50 Hz mains, clean -73 dB but what appears to be data acty from 50 - 104 Hz with 2nd mains harmonic at 100 Hz  -114dB
clean and beyond that no discernable mains harmonics which is good. All mains services in this area are underground and no mains high voltage grid in the area.
No sign of any earth wobble or magnetic reversal on the Shumann frequencies.
de mal/g3kev
 
 
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