Now whispering on MF... 475492 EA5DOM 475785 IW4DXW 475780 LA3EQ ... all good signals here, but so close that they tend to lock out each other when transmitting simultaneously. Guess I need that new
Something is going on up there in the ionosphere... Directional colours on my LF grabber are more variable than usual, indicating that polarisation is being stirred up. And there is strong VLF-to-LF
Now also another strip involving DHO with GQD: 138.83 - (23.4 - 22.1) = 137.53 kHz http://df6nm.bplaced.net/LF/vlf_lf_icm_2013/df6nm_151108_0040.jpg 73, Markus From: [email protected] Markus Veste
Hi Joe, the attached plot shows the frequency stability of your opds trace received last night http://df6nm.bplaced.net/LF/opds32_151110_0736.png . Each data point is the interpolated peak of a singl
Joe, more of the same from last night, this time with frequency and level plots. Again we see some frequency variation of similar size as yesterday. It is not clear how much of that is due to propaga
Hi Joe, an interesting change happened last night: as far as I can see, your frequency has shifted to nominal 137477.000 at 22:45 UT, and appeared to be rather stable thereafter. Regarding EbNaut tra
Last night, my MF RX picked up 21 Whisperers from 9 countries, versus 7 Opera singers from 5 countries. 73, Markus From: Mal Hamilton Sent: Thursday, November 12, 2015 9:51 PM To: STRG + Klicken, um
Joe, well maybe the "crystal drift" is not the whole story... I measured both your Op-32 and QRSS transmissions (nominally on 137477 and 137777 Hz respectively), before and after the OCXO tweak. Oper
Hi Laurence, though M0PPP is in my opds-32 searchlist he hasn't been detected here - so I would dare to say that he was not transmitting on LF. 73, Markus From: Laurence KL7 L Sent: Friday, November
Hmmm that's Nov 10 - didn't look that far back. But indeed he's not in my log there either, so must have missed him. What was his transmit frequency? Perhaps I can find a trace in the saved spectrogr
Vrms max = 2pi * frequency * number_of_turns * cross_sectional_area * Bmax / sqrt(2) 73, Markus From: [email protected] Clemens Paul Sent: Sunday, November 15, 2015 10:18 AM To: rsgb_lf_group@blacksheep.
QRSS better than WSPR? Almost, but not quite... see Rik's evaluation: http://on7yd.strobbe.eu/QRSS/ The SNR threshold 50% successful WSPR decodes is between -29 and -30 dB (2.5 kHz), wheras the QRSS
humiliation of being a significant part of a mHz off QRG, ;-) The upside is that such offsets are perfectly deterministic. Knowing your clocking scheme, and assuming that your controller always roun
Hi Mal, whereas data modes when they do not decode they meaningless ...yes, the "all-or-nothing" or "brickwall" effect of error-correcting digital decoders. That's why I generally share your preferen
Hi Domenico, thanks again for this great experiment. I guess we were both amazed that it worked so well on MF! Tonight I am decoding your messages again, and I'm joining in on odd quarters (21:15, 21
Hi Luis, nice video - that's how our antennas should look like at night! Best 73, Markus PS In colloquial German, that spelling mistake sounded quite funny ;-) --Ursprüngliche Mitteilung-- Von: VIGIL
Well done Andy! This decode was from a message before the NTP adjust. Your transmit frequency looks stable and accurate. I have temporarily moved the opds SpecLab instance to your frequency, and inve
Andy, getting even better... 56/704 symbol errors and 11.2 dB Eb/N0 for the 16:30 message. I'm sure that Domenico will be able to pick up the signal in South Italy. Would anyone in TA-land want to at
...oops sorry, this is the correct attachment. 73, Markus --Ursprüngliche Mitteilung-- Von: Markus Vester <[email protected]> An: rsgb_lf_group <[email protected]> Verschickt: Di, 17 No
Hi Andy, below are bit-error derived Eb/N0 results of your decodes here. The gap between 17:20 and 20:10 was me taking a break, and 21:20 to 22:20 washed out by local QRM. I'll call it a day now, but
