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Re: VLF: Strong drifting carrier on VLF!

from [Gary - G4WGT] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: Strong drifting carrier on VLF!
From: Gary - G4WGT <[email protected]>
Date: Fri, 6 Aug 2010 19:57:26 +0100
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Mal,

Sorry, but been out most of the day & was not able to respond. Just looked at the 8.970kHz system & battery is down. Will have to charge overnight (sealed lead acid type).

73

Gary - G4WGT.


On 6 August 2010 16:33, mal hamilton <[email protected]> wrote:
Gary
You seem to have a sensitive RX on vlf. Can u see the signal testing on 8.97 approx , my RX not calibrated.
Long dashes with power variations.
de mal/g3kev
 
----- Original Message -----
Sent: Monday, June 28, 2010 11:37 AM
Subject: Re: VLF: Strong drifting carrier on VLF!

Hi Stefan,

When I read your report I set up my VLF (M0BMU) loop & monitored there & also with my JRC NRD-345 Rx.

The signal is quite strong on SpecLab & is moving up the frequency in steps from 14.0 kHz to 15.0 kHz in last 30 minutes. The JRC is showing S5 (noise S1) on the meter using Mini-Whip active antenna.

73

Gary - G4WGT.





2010/6/28 Stefan Schäfer <[email protected]>
Dear group,

Currently there is a very strong (abt 30 dB S/N) drifting carrier that started about 7:30 UTC on abt 12 kHz and is moving now up on 14 kHz. First i thought that it is a local signal but now i saw that it is also visible on the DF6NM VLF grabber with about same strength!

http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm

http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html

Has anyone an idea what it might be? It must be a commercial transmitter due to the signal strength at both locations!

73, Stefan/DK7FC





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