Hi Stefan, just took a close look and noticed the 1 Hz spaced lines around 137.5 kHz. They appear to be a replica of the DCF77 timecode, including the minima at +-10 Hz corresponding to the 100 ms ca
Thanks for this Pieter! There are a couple more modes that have been used on LF, and of which I'd be interested to see quantitative SNR threshold data: - Wolf PSK-10 with variable long integration fr
Stefan, the long dash is the DF6NM transmission on Jan 6 (see message pasted beneath). Thanks for the compliments anyway ;-) 73, Markus From: [email protected] DK7FC Sent: Saturday, January 10,
Hi Graham, as far as I know, Stefan's RF power is actually lower than that of many other LF stations, eg. those running ex-Decca modules. But maybe he does have a more efficient antenna than most ;-)
Hi Joe, Terry is right.You did produce an impressive signal last night, even here in the hinterland. Unfortunately the blue color does not appear so bright on my grabber, so here's one from 4 UT with
My best offer (with the world around me once again rotated 120° anticlockwise, to make America green): https://dl.dropboxusercontent.com/u/26404526/LF/testTA1501170400_green.jpg 73, Markus (DF6NM) Fr
Cesare I5TGC is an avid homebrewer, and he managed to erect a quite efficient LF / MF antenna on limited space. Take a look at his 472 kHz gear and his 400 W tube amplifier on his homepage: http://ww
Thanks Dionysios for sharing your results. Well done picking up VO1NA again in Greece! Have a look at the bandwidth indication, which (besides possible drift) basically tells us whether a station is
Hi Stefan, your fieldstrength seems to be the same as usual here. 73, Markus From: DK7FC Sent: Saturday, January 24, 2015 12:57 PM To: [email protected][email protected] Subjec
Hi Pete, in your screenshot Stefan's aural CW trace is clearly visible on 136.5 kHz, but the AGC is being pushed down by G3XDV's Op-32 on 137.518 kHz. This could probably be resolved by inserting a n
Hi Stefan, interesting, great experiment! I've placed your two MF grabbers side by side. Actually except for the different scroll rates, the two spectrograms look surprisingly similar. Even some of t
For my LF opds-32 detector, I currently have 49 entries in the searchlist: https://dl.dropboxusercontent.com/u/26404526/callsloc.txt I am regularly inspecting the output for likely false positives, w
Hi Stefan, yes I've been considering that. My opds page https://dl.dropboxusercontent.com/u/26404526/opds.htm has links to text output from 14 different opds-32 observers, out of which 8 seem to be c
My grabber shows what looks like a strong Op-32 signal on 137519.82 Hz, but nothing is being detected nor decoded by any of the online monitors. The colour and keying sequence much resembles prior em
Stefan, so it looks like your two receivers provide some spatial diversity, simultaneously listening to both may be useful to overcome fading nulls during QSOs. On the other hand, the advantage of a
Andy, I've been wondering about that one too. It seems to be an intentional transmission as the frequency is constant (136697.3 Hz), and timing is reproducably 100 s duration and 6 minutes repetition
If you receive yourself, wspr(x) will decode and display your own callsign locally, but the spots won't appear in the wsprnet database. You could circumvent this by modifying your callsign in the wsp
Stefan, for me, rather not ... I'm mostly using a netbook which has a 1024 x 600 screen. The latest and often most interesting part of the spectrogram is usually on the right hand side. 73 Markus (DF
The unid carrier source seems to have reappeared, morphed into noise bands with same timing: https://dl.dropboxusercontent.com/u/26404526/df6nm_150302_0445.jpg Still visible in daylight on Stefan's q
The unid carrier source seems to have reappeared, morphed into noise bands with same timing: https://dl.dropboxusercontent.com/u/26404526/df6nm_150302_0445.jpg Still visible in daylight on Stefan's q
