Re: LF: Re: 4X/DF6NM

["Markus Vester" <markusvester@aol.com>]

Stefan, LF,

 

during the evening I was hampered by a bad contact in the ground lead. This has been fixed now, resulting in a fabulous 30 dB signal from DK7FC. 

 

Last night produced a nice list of Op-32 correlation detections (pasted beneath). Tonight possible hits will be uploaded in realtime on

https://dl.dropbox.com/u/26404526/detected.txt

 

Yes I'll be going back to cold Germany on Thursday, unfortunately...

 

Best 73,

Markus

 

4X/DF6NM KM73TD

 

   UT    call   distance  frequency bandwidth  SNR    correlation
21:47:08 SV8CS   1437km 137540.104Hz 146mHz -38.5dBOp 100% 20.6dB
22:19:56 SV8CS   1437km 137540.051Hz 160mHz -40.9dBOp  50% 15.2dB
23:25:27 SV8CS   1437km 137540.026Hz 170mHz -40.5dBOp  49% 15.7dB
23:30:12 UA4WPF  2960km 137541.766Hz  12mHz -45.6dBOp  95% 18.6dB
00:31:01 SV8CS   1437km 137540.006Hz 149mHz -40.0dBOp  83% 17.9dB
00:43:13 UA4WPF  2960km 137541.757Hz   5mHz -47.5dBOp  56% 16.2dB
01:03:48 SV8CS   1437km 137540.009Hz 168mHz -43.3dBOp  92% 16.6dB
01:20:12 UA4WPF  2960km 137541.751Hz   7mHz -46.2dBOp  50% 17.9dB
02:09:21 SV8CS   1437km 137539.957Hz 174mHz -38.6dBOp  98% 20.9dB
02:42:08 SV8CS   1437km 137539.990Hz 139mHz -38.7dBOp  87% 19.6dB
03:14:55 SV8CS   1437km 137539.997Hz   3mHz -51.8dBOp  95% 15.8dB
03:47:40 SV8CS   1437km 137539.999Hz 134mHz -43.3dBOp  72% 15.5dB

From: Stefan Schäfer

Sent: Monday, March 11, 2013 9:19 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Re: 4X/DF6NM

Hi Markus,

I'm going to start the TX in DFCW-90 on LF for this night. I assume you will catch me :-)

Have a nice time there. Winter has come back here in DL :-//

73, Stefan/DK7FC


Am 10.03.2013 21:09, schrieb Markus Vester:

During a very pleasant meeting with Chris 4X1RF and his family, we discussed possibilities of improving the noise situation for LF here in the Kibbutz. Chris suggested to replace the low active antenna by a passive long wire and a separate earth. Walking through the village with "open eyes", today I managed to find some 30 m of old unused telephone wire which was thrown over some branches, using fallen grapefruits as casting leads. I could also salvage a ferrite choke from a discarded TV power supply, which now serves as a common mode choke to separate the earth connection from the notebook supply. Comparing HGA / DCF before and after, it looks like the SNR has dramatically improved by some 10 to 15 dB.

 

So the TA / Eu grabber is up again on the dropbox (link below), and I'm watching wspr-15 and Op-32 again tonight.

 

Thanks Chris!

 

Best 73,

Markus (DF6NM)

 

 

From: Markus Vester

Sent: Tuesday, March 05, 2013 8:00 PM

To: rsgb_lf_group@blacksheep.org

Subject: LF: 4X/DF6NM

I've set up a temporary LF receiver near Kiryat Shmona

http://no.nonsense.ee/qthmap/?qth=KM73TD18KG ,

uploading TA and Eu slots to the dropbox file normally used for MF

https://dl.dropbox.com/u/26404526/df6nm_MF.jpg .

 

This is only a low active antenna outside the window, so the local noise baseline is far from optimal. The internet connection is "borrowed" from a friendly neighbour so probably not too reliable either.

 

Looking out for WSPR-15 and (perhaps) Opera-32 as well.

 

Best 73,

Markus (DF6NM)