PS: Are you now radiating something on VLF? What is the distance to SQ5BPF? unfortunately i'm totally qrt since about a month, but i hope to have the receive setup working again in 2-3 weeks. Marcin
It has just occured to me that the 1A range may not be high enough for some of the LF QRO merchants. for qro you can buy cheap ex-warsaw pact "antenna equivalent". these are boxes which have an rf th
Hi Jacek, Yes I have been collecting thermocouple meters for about 60 years. The problem with them is they are very fragile. In the UK it is generally the case that any meter offered is usually of 19
look for ublox neo-7m modules. they will go over 10MHz (neo-6m modules will generate <1kHz). they were avaliable on dx.com, ebay.com and other auction sites. these will work <10MHz (according to manu
Jacek/SQ5BPF asked if i will transmit again on 4470. Now he has a challenge... unfortunately the best i can do is: initial reference phase 59.5 amplitude 4.543e+00 carrier phase: -37.6 carrier Eb/N0
Merging the currents from multiple front-end devices is a conventional way to achieve ultra low noise and this looks like a good implementation. I tried this technique with two devices but the doubl
visible here. please disregard the graph description, this is from 3h periods with 92.6uHz bins, i'm running a better resolution plot now, but it will take a while to calculate (only 1.6GHz cpu) VY 7
waterfall from a longer period. unfortunately no can't see Markus' signal, but i will try shorter periods and different noiseblanker settings VY 73 Jacek / SQ5BPF Hi Luis, Mike, VLF, A carrier is now
I've set up a 8270Hz grabber at: https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/grabber-4-8270hz/ 92.6uHz bins, 1 hour steps. Stefan's signal is visible there. I hope to have this functional o
4 transmissions were done successfully. Is there someone trying to decode it at all or is it just a lonely test? of course people are trying to decode it :) (message sent by email for validation, bu
Stefan, could you also send carriers during your experiments? i understand that changing bands requires a trip to the roof, so maybe you could send a 1 day carrier after changing the band. you could
before QSY, could you perhaps also leave the 8270.005 Hz carrier on air overnight? This would give Bernd DF9RB a chance to test his RX in a 31 uHz spectrogram. and i'm sure others will benefit too,
Stefan, thanks for the carrier, this helped me improve my grabber a bit. i've changed the time range in my grabber to 7 days, so that you can compare with your previous carrier, and also added a "nor
Got a decode with good Eb/N0. Message not shown, but confirmed by Stefan. found rank 0 ber 3.4896e-01 Eb/N0 4.1 M -8.871037960e-01 [x] ps [ 0 0 0 0 0] carrier phase: 1.8 deg carrier Eb/N0: 6.1 dB car
maybe Stefan could qsy a bit? for example i'm 19.8 wavelengths from Stefan (and Paul is almost the same). shifting 81 Hz either way would make the path 1/4 wavelength longer/shorter. if there are som
If you choose to use the NEO7 fractional pll output directly, then pick frequencies which are 48MHz/N where N is an integer. This will lead to a much cleaner signal. 8.27015kHz is one possibility (48
Also decoded the 20171020, 22-24 ebnaut transmissions 20171020 by itself was great: found rank 0 ber 3.7500e-01 Eb/N0 3.3 M -6.407948732e-01 [=] ps [ 86 60 90 30 60] carrier phase: -11.6 deg carrier
Interesting to see how Stefan's trasmission is received in several consecutive days (more or less the same, except for 20171115, where it's about 3dB weaker) prep [ 0 0 0 0 0] found rank 0 ber 2.7474
I've made a temporary grabber for 17.4701kHz here: https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/tymczasowy-grabber-sq5bpf-do-testow-stefana-dk7fc-na-17-4701hz/ Unfortunately no signals were
