Re: VLF: Strong drifting carrier on VLF!

["mal hamilton" <g3kevmal@talktalk.net>]

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 -----

From: Gary - G4WGT

To: rsgb_lf_group@blacksheep.org

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 <schaefer@hst.tu-darmstadt.de>

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