Hi Stefan Loops at this QTH are not very successful, yes lots of mains borne QRM. I do have a 1.2m diameter octagonal 10mm copper loop, I have never tried that on Sub 9kHz, I may try it one day down
I see from your Grabber that you ceased at 07:30. Shame because I needed a little longer to confirm the line in my 47uHz, it looks promising though. 73 Eddie G3ZJO
Hi John Good thinking. I think the hum filters used in SpectrumLab specificity the Paul Nicholson ones work in that manner. A lot of the mains borne interference is from consumer gadgets with switch
On 13/04/2017 14:59, DK7FC wrote: ...you may ask the neighbours to place a wire antenna close to their house, picking up strong E fields :-) These signals fed to a JFET source follower, then use a tr
Well I thought yesterday that I could see nothing on 6470.005 Hz from that session but looking at my Grabber http://www.g3zjo.talktalk.net/vlfgrabber.htm VLF4 maybe there are a few coherent pixels. N
On 20/04/2017 10:02, DK7FC wrote: Last night i run another message: f = 6470.100000 Hz Start time: 19.Apr.2017 19:00:00 UTC Symbol period: 30 s Characters: 2 CRC bits: 20 Coding 16K21A Duration: 6h
Hi Stefan No decode here, not even false ones. 73 Eddie G3ZJO On 21/04/2017 23:53, DK7FC wrote: I should try a long transmission of a short message during daytime: f = 6470.100000 Hz Start time: 22.A
Hi Stefan I tried 20K and 200K. Now tried 2M, still the same, nothing. It seems we may be at the limits of signal on 6470 given the ERP, QRN, QRM etc. Always ready for another challenge, I tried the
Hi Jacek / VLF The only other explanation (apart from lower qrm levels) might be the software used. QRM. Stefan suggested running a 366mHz spectrogram at 6470 Hz, see http://www.g3zjo.talktalk.net/vl
False decodes only at this end. However the 7 to 9 kHz segment was plastered with QRM lines last night. I tried Decoder v0.7, very fast. I have now thrown my toys out of the pram. 73 Eddie G3ZJO On 0
Hi Stefan Aha ! That would have been nice, very encouraging :-) What does that mean? An English expression :-) Got Rather annoyed with the summer QRM. The computer has been running for several weeks
Hi Stefan I didn't quite believe what I was reading you may like to take a look at my Grabber. http://www.qsl.net/g3zjo/vlfgrabber 73 Eddie On 27/11/2017 09:34, DK7FC wrote: Hello Markus, thanks for
Left it on overnight. Would you like it on 24/7, I see diurnal variations similar to Marcus but more pronounced due to my lower signal strength. 73 Eddie On 27/11/2017 20:30, g3zjo wrote: Hi Stefan I
Hi Dave Stefan's e-probe design for 8.7kHz antenna and sound card RX. The BPF in the probe has quite some cut off outside sub 9kHz but maybe that's good due to the adjacent big boys. 73 Eddie On 28/1
Hi Luis Good Luck. Keep trying, don't give up. Consider it a gift to be twice as far away, more challenge :-) 73 Eddie On 28/11/2017 12:13, VIGILANT Luis Fernández wrote: Congratulations Eddie A nice
Hi Marcus Thanks for the update, I have put my Grabber http://www.g3zjo.talktalk.net/vlfgrabber.htm on. The signal is a bit noisy here, I will try and find some of my alternative usr files which have
Hi Marcus Was there a ZEVS capture in the blog post in the link above or was it missing ? Trying it locally I had a message about updating my Photobox account to include third party images. Another d
Hi Edgar It will be nice if that is KPTF / ZEVS. Just lately I have been running several instances of Speclab at 82 Hz and have seen very little to identify as KTPF at this QTH. I think that the sign
On 24/01/2018 10:44, Edgar wrote: Sorry no flat to rent. Perhaps hire a Campervan and do a tour then. Temperature forecast to be 38 C this Sunday. Go on rub it in. 73 Eddie
