Hi All, Running SpecLab here using DF6NM's 3.8mHz 60s configuration, with 10m vertical antenna untuned directly to EMU 202 external sound card.No noise here, good conditions. F4DTL Nicolas JN18FP
It seems a bit of overshoot to me to buy a perseus (just checked, they ask 850 Euro for it), so my first option would be to go to the PC soundcard. Do you (or others) have any experience with that ?
Thanks for the compilation Paul - very impressive ! Like Horst I am looking for a better location -like yours or Renato'sat least for VLF reception ;-) Cheers, Wolf . P.S. the lead acid battery for t
Dear all. I'm also set up to receive on 8970 hz now....although I don't know how effective it will be. I have resonated my 137 kHz TX antenna with a 1 H inductor, and I can hear the 11.905 Alpha
Dear LF Group, The second "K" came through at "O" copy - I changed the spectrogram scroll rate after the first K. The receiver is now set for DFCW120 - last time I looked, there seemed to be some vis
My best effort at a spectrogram, added to end of http://abelian.org/vlf/ss100321/ Produced after re-running the signal processing without clock correction. The spectrogram is normalised for uniform b
Hi Jim, you asked: For this reason, the filter was added to Yes, that's possible. There are various noiseblankers which can be included in the signal path before the analyser. The most simple one is
Hello all and congrats again to Stefan, I am not sure if the trace on the capture is Stefans signal - just had no time to figure that out or even go to the countryside with less noise today. Horst WE
Dear LF Group, After the long "K"s, DK7FC's signal was visible up until 1630, but not readable. I'm not sure what transmission speed Stefan was using - I was using settings for 120s dots, but am not
Dear LF Group, I now have set up the 9kHz RX and antenna at my /P location a few km from my home QTH. The man-made noise level is substantially lower there, so I am hopeful... Will return to the RX a
Hi VLF, Stephan Sorry Stephan but nothing here,maybe very weak traces i dont know really. F4DTL Nicolas JN18FP In a message dated 21/03/2010 13:35:46 Paris, Madrid, [email protected] writes: Hi All, Runn
Dear Stefan, LF Group, I checked the position of my portable location, it is in IO91WR, at 51.7104 degrees N, 0.12549 degrees W, if my GPS receiver is to be believed, making the distance 658km. Jim,
Nice reception. Here are some spectrograms made from the on-line receivers, Bielefeld - Wolfgang Büscher, DL4YHF, http://abelian.org/vlf/live/vlf6.sg.png Cumiana - Renato Romero, IK1QFK, http://abeli
Dear Roger, LF Group, The ZTX690B is in current production, and is available from suppliers like RS components, Farnell, Rapid in the UK, or Digi-Key and so on. In this particular application, with t
Hello Roelof, thanks for the circuit diagram. It looks pretty simple. If I "read" the circuit diagram correct it is a buffer amplifier (the voltage gain maybe even less than 1, however due to the imp
Dear LF Group, This is a bit of my spectrogram between abt 1230 and 1330utc - the "K" is reasonably visible brtween about 8969.9 and 8970.0 Hz. The final "dash" seemed stronger, with an SNR around 5d
I have taken the liberty of gathering everyone's spectrograms into a table, http://abelian.org/vlf/ss100321/ I'll leave mine out until I have time to reprocess it, but first I have 1600 whistlers to
Dear Stefan, LF Group, ...>Jim, M0BMU is the 2nd best DX distance! Jim, can you describe you RX detailed, pse. Or have i forgotten an older mail? What was the new /p QTH? And what are your observatio
Very nice! 0,8m*0,8m is really practicable and easy to built for everyone. Not expensive too... And our distance is 655km, well above the garden ;-) I do not even see a too big difference in S/N comp
Dear all. I'm also set up to receive on 8970 hz now....although I don't know how effective it will be. I have resonated my 137 kHz TX antenna with a 1 H inductor, and I can hear the 11.905 Alpha stat
