Ufortunately i didn't receive anything here. Not very exciting but i believe that negative results should also be reported. The spectrograms: https://klubnl.pl/grabber/grabber_sq5bpf_2970.png https:/
This is the best i can do so far. Using vlfrx-tools 0.9f and vtfilter -a th=5 -h hp,f=1750,poles=8 -h lp,f=4250,poles=8 | vtblank -a25 -d0.005 -t1000 Does that count as a reception? VY 73 es HNY Jace
Thanks Markus You're right! This is a nice example how one can make a false result. I will re-run the tests this evening. VY 73 Jacek / SQ5BPF On Wed, 2 Jan 2019, Markus Vester wrote: Date: Wed, 2 Ja
Hi Stefan Unfortunately no detection on 2470 and 2970 (especially after Markus noticed that i'm trying to receive the wrong frequency :). Could you try 5170 and 6470Hz? VY 73 ES HNY 2019 Jacek / SQ5B
The spectrogram is here: https://klubnl.pl/grabber/grabber_sq5bpf_8270_1.png For now it will update every 1 hour, and for now i will leave it updating, maybe Stefan would like to draw another nice br
some time ago the yahoo group was formed because of two problems: lack of archives and problems getting mail from/to blacksheep. both are solved. the problems in getting mail from/to blacksheep were
I have an archive of the LF reflector from 1999 to early 2006. It's in a Thunderbird archive folder which is readable by Thunderbird if you have it. thanks. i think this is either mbox format, or so
the BIA NDB at Rzeszów Airport has been switched off a few months ago. now i know it's permanent. a VOR/DME is being installed to replace it. so no more signal on 473 kHz, 475 kHz and 474kHz. this ha
Congratulation with the grabber started! Thanks! Put your QTH locator to the page next time. It's on the left bottom side. The locator is KO02md And put "offset" to Spectrum lab pse for the screenin
I've set up a temporary 137kHz grabber. QTH is Warsaw, Poland KO02md. RX is an ex-DDR EKV03 with a mini-whip active antenna. Currently it is set for QRSS3. It is in a nice mid-point between active gr
your grabber works very good thank you . thanks! good conditions tonight, lots of stations, and i think that the local qrm level is a bit lower vy 73 Jacek / SQ5BPF
Hi Jacek , Laurence , LF I confirm "W" on 137.779 ! I think that it is UA4WPF . Also trace of "Y" on 137.778 , RA3YO ??? the Y is clearly visible here also: http://acid.ch.pw.edu.pl/~sq5bpf/grabber/
[...] Luxembourg effect, transmitter IMD or just me missing the point? maybe just mixing by some rusty junction? (long rusty fence or something similar) does the imd vary when the weather is dry, an
Hi Alan Just like you said - i have no personal expierience with the "rusty bolt" effect on LF/MF, and am extrapolating HF ideas down to LF :) Hypotheticaly speaking the structure size to get enough
Well, perhaps it is not necessary to reach a "DX", DX becomes very relative in that frequency range. 50km sounds like a really good DX here. 50km would be real dx, because this is not near-field anym
If you are considering beaconing at 9kHz SpectrumLab has a nice "digomode terminal" that can be used as a beacon. the frequency can be whatever your sound card can generate (over 20kHz with a 48ks/s
Those looking at vlf transmission should look at cave radio electronics, tens of kHz are used for communication and several kHz for beaconing. The antenna limitations aremuch greater than for radioam
Hello all! The Polish Amateur Radio Union has a new "Poland on Long Wave - 136 kHz Award", which is the second LF award avaliable in Europe. Rules are avaliable at: http://awards.pzk.org.pl/html/136_
