decoded the 20171205 transmissions on 17470.1Hz, but without the noiseblanker. the decoded messages were already published, so i'm including them here too. 7:00 UTC transmission prep [ 0 0 0 0 0] fou
for comparison the second transmission with notching (using Paul's settings) and a noiseblanker (abt 8dB better S/N): found rank 0 ber 2.4792e-01 Eb/N0 9.9 M -1.090797186e+00 [CIAO] ps [ 28 -30 -30 0
vtfilter -e eqmap -h bp,f=17470,w=3000 -h bs,f=16400,w=600 -hbs,f=18300,w=800 with your filtering settings i immediately went from no signal to great signal on my grabber: https://klubnl.pl/wpr/en/in
Some trials are called for and I can imagine a shell script already being prepared at SQ5BPF. of course :) unfortunately i don't have a place to run it. previous searches were done on a box with 176
I've made a new grabber with 556uHz bins (30min integration tims): https://klubnl.pl/wpr/en/index.php/tymczasowy-grabber-sq5bpf-do-testow-stefana-dk7fc-na-17-4701hz-556uhz/ Of course Stefan's carrier
This is a most significant achievement. East to west is some 20dB harder than the other direction! could you give a short explanation? i don't really understand nonreciprocal propagation VY 73 Jacek
A few months ago i've written 3 articles (in english and polish) for the klubnl.pl site describing vlfrx-tools usage for vlf monitoring (both hardware and software. This might be complementary to Ale
Hello Jack, I'm currently starting to write a short article about using spectrum lab for vlf for the klubnl.pl site. Could you tell me what you would like to see there? (example SL configs etc). We c
My question is how long does it take to measure 8270.01953125 Hz? Based on my experience, it seems that it would take more than 3 years. Where am I going wrong. consider a "hardware" example: you ca
I've found that the thorcom.com servers (which are the MX for blacksheep.org) are not very forgiving of incorrect DNS settings, and also STARTTLS negotiation. Even many "professional" email providers
We did a loop tx experiment with Marcin SQ2BXI on 20 january 2018. The tx was a semi-horizontal 1-turn loop about 150x50m (from memory), 1A current at 8270Hz. The tx frequency was generated via Paul'
Jacek, you mentioned what I was midnight oiling here " If you want some semi-DX in the H-field, then try coupling into some long conductors (pipes, power lines, railway tracks etc)" And i forgot pho
Hello I have a few carriers on my grabber: https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/grabber-4-8270hz/ 8270 - DK7FC? 8269.996 - DJ8WX but who's carrier is at 8270.008? (off now, but was p
I've contacted Joe, and he says the signal is consistent with his transmissions. Bingo indeed! I've received Joe's ebnaut transmissions a year ago, but drawing a line on my grabber is a big achievmen
Instead of ferrite rods from AM radios, search for "impeder" rods. These are used for induction welding of pipes, and can stand high power at hundreds of kHz. Sometimes you can get them cheap on auct
iI forgot, old TV flyback transformers are also useful as a source of ferrite for power applications. Also the HV windings on these transformers (at least from TVs made in Poland) have 1-1.5H inducta
After arriving home tonight, I've put up the antenna again and started another carrier on 8270.005 Hz. Good signal in Warsaw: https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/grabber-4-8270hz/
Good signal on my grabber: https://klubnl.pl/wpr/en/index.php/klubnl-pl-grabbers/grabber-4-8270hz/ What is the antenna orientation? jacek Date: Sat, 29 Dec 2018 13:43:14 +0100 From: DK7FC <selberdenk
