Hi Laurence, you may be picking up UrsaNav's ongoing eLoran test from Wildwood (NJ). It has been on air continuously since Jan 5, 13:50 UT, using GRI 8970 with both master and X secondary codes. Thei
Note however that the power scale saturates at 1 W ERP, which is (by definition) the largest power an amateur can possibly radiate on LF and MF ;-) Best 73, Markus (DF6NM) --Ursprüngliche Mitteilung-
My VLF grabber has been reactivated at http://www.df6nm.de/vlf/vlfgrabber.htm . I have modified the common mode isolation scheme at the antenna input, hoping to make reception a little less susceptib
...yes I saw it too. The WSJT-X spectogram showed nine equispaced lines with distinct little gaps between them, last time at 19:12 on 1373 Hz, in between CQ blocks from DK7FC. Then at 19:14, Stefan w
Hi John, Alex, according to my opds spot 2016-01-17 05:33:06 R7NT 2060km 137540.953Hz 4mHz -40.5dBOp 100% 19.8dB, the R7NT transmission ended at 5:33 (or would have if it had it been fully completed)
Since 21:40 UT I am radiating a GPS-synchroneous carrier on 8270.0025 Hz, hoping for a trace on Stefan's grabber between the DJ8WX and local DK7FC lines. Antenna current is now 0.28 A with a bit of s
Thanks Stefan, glad to see that! Using EbNaut, 15 dB SNR in 0.63 mHz noise bandwidth should support about 12 characters per hour. But this will probably have to wait until you have finished your loca
Wow - thanks Paul, that is much better than I had dared to expect. I thought that the first transmission might have been out of lock due to too much RF on the 1pps line. This time the PSK modulation
For yesterday's EbNaut transmission, I have not employed the usual Rubidium oscillator and automatic antenna variometer hardware, but reverted to the software modulation scheme which had been origina
Hi Wolf, yes, I only needed a way to retrieve one number at the time from the text file. Initially I used freadln(), and later went to fread() as inserting spaces in an editor seemed easier than line
Hi Domenico, thanks for the VLF screen grabs! I have uploaded my current VLF-grabber SpecLab settings: http://df6nm.bplaced.net/VLF/vlfgrabber_settings_160119.zip Beware though that several settings
Frequency: 8270.0025 Start time 16:00:01 Polynomial: 4K19A, CRC 16 bit 13 characters Symbol Duration: 10 s Total Time: 4480 s Good luck! Markus --Ursprüngliche Mitteilung-- Von: Markus Vester <markus
Correction: I will move to 8270.100 Hz during the PSK sequence. 73, Markus --Ursprüngliche Mitteilung-- Von: Markus Vester <[email protected]> An: rsgb_lf_group <[email protected]> Vers
Started 10 minutes later. Frequency: 8270.1 Hz Start time 16:10:01 Polynomial: 4K19A, CRC 16 bit 13 characters Symbol Duration: 10 s Total Time: 4480 s Good luck! Markus
Thanks Paul for trying! This message was really targeted at Stefan's receiver in Heidelberg, who has started saving 70 uHz spectum data for possible Ebnaut decodes. But even there it would have been
The five-character sequence was sent at reduced power with no further problems. Thereafter more carrier on 8270.0025 until QRT at 20:30. Best 73, Markus (DF6NM) --Ursprüngliche Mitteilung-- Von: Mark
Hi Laurence, good to read that you are all well after the shake! Today I briefly looked at the HGA mark (idle) frequency and got 135430.02 +- 0.01 Hz. The space frequency (nominally 136.17 kHz) is mo
