G8JNJ
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Update I have been able to connect to one of the KiWi's using a USB cable and kiwisdr.local:8073/ as the URL. It all seems to be running as usual apart from the ethernet port. Any tests I can try ? Regards, Martin - G8JNJ
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I had a look at my KiWi WSPR spots to compare results from before and after v 1.242. Although there is no immediately obvious difference between the reported S/N values, v 1.242 does seem to improve the consistency of the reports, with much less …
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Hi John, OK no problem, as you say there are other issues which should take priority. Regards, Martin - G8JNJ
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Hi John, Could you also make it remove the top extension pane e.g. the TDoA map so that it's possible to temporarily see more of the waterfall when an extension is running ? Or perhaps toggle the waterfall and TDoA map (or other extension windows) …
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Hi John, That's really useful and looks especially good when displayed full screen with the spectrum running too. Any chance of being able to drag the band / dx tag window / frequency scale 'divider' to change the ratio of Tag / waterfall / spectr…
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Hi Jamie, There are two WSPR frequencies in the KiWi drop down box for both 80m and 60m. This is because the frequencies have either been changed to better align with bandplan updates or in the case of 60m have remained on different frequencies be…
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Hi John, If you are using Leaflet (or even if not) these links (cribbed from another forum) may be of interest OpenStreetMap Donations https://wiki.openstreetmap.org/wiki/Donations OpenStreetMats Help Site https://help.openstreetmap.org/questions…
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Hi John, I like the new TDoA maps in v1.238, I think I actually prefer them to the original :-) Thanks for the quick fix. Regards, Martin - G8JNJ
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Hi Colin, Good luck when trying to measure the IMD performance, especially using the single tone method. Here are my measurement results, note that I'm using amateur grade kit to measure it, so there may well be errors creeping in, but I have spen…
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Hi Stu, A nice build :-) A couple of observations, sorry if I sound a bit picky (I know, just can't help it), but I've learnt from past experience and a lot of rusty water.......... You will get water ingress via the loop mounting bolts where the…
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Hi Colin, I think George's drawings are correct. Some time ago I asked him about this apparent mistake. It turns out that although he has crossed the secondary windings over, he has also changed the feedback winding nomenclature to illustrate thi…
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Hi John, You need to connect to your KiWi by means of a terminal program such as PuTTY. https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html Setup the KiWi IP address in PuTTY and select Port 22. Select SSH and connect. When you conne…
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> >Something else for me to look into.. > Hi John, Yes, sadly this seems to be the case, I think something else has broken over the past few updates. I'm just not able to get any TDoA results back for about 95% of the time, even running…
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Hi John, Can you clarify the TDoA situation for me. Does the Google map problem actually prevent the TDoA application from working or is it just a mainly cosmetic issue ? I ask because I've not been able to get any TDoA results back for the past …
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Ah yes I missed the other thread, I got confused because I'd been following a similar conversation on another forum regarding the loss of Google maps. They had suggested Leaflet (an open-source JavaScript library for mobile-friendly interactive map…
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Hi John, Unfortunately it looks like the recently introduced Google maps free usage limit has now been exceeded and the TDoA maps have started to display the 'For development purposes only" tags on the map tiles. Regards, Martin - G8JNJ
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Sometimes if the power supply doesn't immediately provide the required output volts but rises from a low voltage up to full output, the KiWi won't start. I've only ever had one case with the symptoms you describe, and in the end UI had to reflash i…
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Hi Ron, I think you may have a problems trying to find an off-the shelf product that does what you require. I designed a lot of specialist signal distribution systems for my last employer (before I retired) and we had quite a comprehensive analogu…
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Hi John, I ran a few TDoA's this evening around 2, 3.8 and 5.2MHz from about 19:00 to 19:40UTC Although they passed the new algorithm test I didn't get any results back even when I waited for >5 mins ? On another occasion I ran an old algorith…
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Hi John & Christoph, Thanks for the latest update. Generally speaking I find that the new algorithm is usable most of the time providing the signals are of good enough quality. If they aren't, I can still run the original version to get a feel…
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There is an explanation in Christoph's most recent blog. https://hcab14.blogspot.com/ If I understand it correctly, he's seems to be testing pairs of plots to see if they are providing good results and omitting the ones that are not (which is typi…
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@ Kovalr Yes, some time ago I asked Kari if he could include the ability to map GPIO ports to specific antennas so that it would be easier to accommodate binary switching of banks of relays as you have done. Unfortunately he hasn't so far) been abl…
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Some further testing with a new (cleaner) CW source on 4548KHz. In order to achieve this I had to adjust the threshold level down to 35 which is not really practical for an off air signal. The CW Bandwidth is 50Hz and AGC settings are also critica…
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Another day and some more experiments. I tried various combinations of LMS filter settings to see if I could improve the signal level for good decodes, but it seemed to make very little difference. I also tried varying the CW filter bandwidth and …
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I've been reading this tread with interest. I have a project that this may possibly help with. I'm trying to make noise floor measurements whilst driving around urban areas in order to assess the interference from broadband over copper VDSL servic…
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https://shop.vb-audio.com/en/12-audio-apps
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Here's a quick comparison using one of my test signals of the KiWi CW decoder Vs. CwGet and WD6CNF's CW decoder, all running near their limit. The CW Bandwidth is 100Hz, threshold 42, AGC set to -100dB / 6dB slope / 500ms / no hang. Note that the …
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Just to add some extra clarification. It was a quick lashup to test the idea. The two signals are AM DSB (like an NDB sending a morse ID). To read the morse you have to tune using CW to one of the two sidebands spaced 2KHz either side of each …
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Hi John, I have a test setup running on http://g8jnj.proxy.kiwisdr.com:8073/ with two AM signals being modulated by a CW recording. TEST TEST TEST 1234567890 THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG The two signals are at different levels 3…
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Hi Paul, "These wide filters are no good for AM DX, so I still stick with my individual notches as per my calculator..." The point I was trying to make is that by varying the L/C ratio you can make the notches as wide or as narrow as you…