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| To: | "[email protected]" <[email protected]> |
|---|---|
| Subject: | SLF: Receiving the American power grid? |
| From: | DK7FC <[email protected]> |
| Date: | Wed, 21 Nov 2018 14:14:16 +0100 |
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Hi SLF friends,Take a look at http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html There, on the 4th image from the top you can see a faint but concentrated trace at 60 Hz. This should be the 60 Hz grid frequency as used in NA and SA. It has been detected in a smaller bandwidth in the past, but from this location on the tree, it is the first time that i see it in 45 mHz FFT bin width. The QRN is very low these days, in that range! 73, StefanPS: At 16 2/3 Hz you can see the German railway power grid changing its colour, depending on where trains are currently driving. |
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