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njc

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njc
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  • If the resistance on the barrel connector (kiwi board by itself) looks good, try to apply power (5V, 2A or more) and check the voltage rails. You can also check if anything is getting hot. See this thread/comment: http://forum.kiwisdr.com/index.php…
  • I did a little sleuthing. This kiwi from Edinburgh, IN receives WZZB from Seymour, IN quite well. WZZB is on the C-QUAM list and is a music station. Here's the online stream for verification: https://wzzb1390.com/stream-wzzb Nick W1NJC
  • Slightly off topic here but related nonetheless. Verizon FIOS recently changed their routers to not report TTL data on ICMP traffic (at least that is what I think). This causes tracert in windows to return data like this: C:\Users\njc>tracert f…
  • OK so it's not a DNS issue. The output from tracert 50.116.2.70 will be useful.
  • I don't know what DNS server the OP or isitdownrightnow.com are using, but the fifty or so I just checked all resolve to 50.116.2.70. However, the reverse DNS for that IP address is li420-70.members.linode.com. An A lookup on that name returned IPv…
  • The horizontal polarization of the dipole might be helping. Most QRM tends to be vertically polarized. Balanced antennas can be better over unbalanced too. You might try a horizontal, balanced antenna and see what happens (dipole, loop, etc.). I …
  • How close are you to neighbors? Can you replicate the problem on another receiver if you have one? If not can you run the kiwi on battery and use a laptop or something and kill the mains to your house? If you can't do either of these, can you try …
  • I 2nd the idea of reducing antenna gain or maybe try an attenuator. See what effect a 10 or 20 dB pad has. I run mine with 3dB (or is it 6dB?) on it all the time because I get overload from AM BCB and SW BCB (the 6MHz stuff I think). Keep us poste…
    in broken rx? Comment by njc December 2020
  • John can weigh in, but I don't think the 5V is used directly by any component. The LDOs all have max inputs to at least 5.5V, not sure about the Beagle though I expect it also to be at least 5.5V. I like to run 5V devices at around 5.25V as well. …
  • I just tested a 750W/1500W 12VDC->120VAC inverter and boy is that thing noisy! 😲
  • http://forum.kiwisdr.com/discussion/comment/10960#Comment_10960 @dcassell Which NOCO unit do you have and which freqs do you see the RFI? I have one of the newer 5A models and haven't noticed any issues.
  • Awesome, I'm looking forward to playing with this! Also: Typo in your 2nd paragraph, should read "880kHz"
  • Adding this on the "Webpage" tab of the Admin interface helps: <script type="text/javascript"> ext_set_controls_width_height = function(e, t) {   e = e > window.innerWidth * .95 ? window.innerWidth * .95 : e;   panel_set…
  • I have noticed this too. The extension window for some extensions goes beyond the viewable area. In most cases, tilting the phone into landscape mode exposes the "X". If that doesn't work, make the selection you want and then reload the…
  • I think transformer coupling at both ends of cat5 or other balanced feedlines will result in lower noise. If you are using coax, common mode chokes will help to achieve the lowest noise floor. On my simple 1m loop I'm using a Casarain LAMB-1A: http…
  • For the non-NBFM squelch the slider represents dB above the median of a number of past RSSI (S-meter) values. Are the RSSI values used for the moving average from within the passband only? Couldn't this result in the threshold being too high when …
  • The recorder could always respect the squelch. It is probably OK since the default is squelch wide-open. This would require someone to adjust the squelch (and thus know of its existence) for it to affect recording. A tooltip somewhere could be he…
  • Did you try measuring DC resistance (with no power applied) on the kiwi's main voltage rails? 5V, 3.3[this comes from the BB], 3.3G, 3.3A, 1.8V, 1V? Measure these with the kiwi board disconnected from the BB. There are some pins on P9, filter ca…
  • @cathalferris Thanks. I'd been thinking about trying something like this but the details of the script had escaped me. So I have it working right now without any changes. It seems that connman will autoconnect wlan0 if and only if eth0 is not con…
  • Does anyone know how to get connman to automatically connect wlan0 on startup? The daemon is running after a reboot but it's not connecting. I can connect manually just fine. This seemed to be working and now is not. I've set autoconnect on, I'v…
  • Like this? kiwisdr.com/quickstart/index.html#id-user-marker
  • Success! The BGA operation worked and the kiwi is functional again using a BBB that I had. Now, I've been trying very hard to get the MT7601 USB wifi dongle working and it's proving just as difficult as last time. I have managed to finally get it…
  • Good catch, thank you. I've fixed it. I have successfully removed the part and cleaned the pads. No shorts now :) I had to up the air temp to 530°F before she broke loose. I remember something similar last time too. I'm ordering the part, it p…
  • Thanks for the tips, John. Yeah the hot air station I have at work is pretty decent. When I did the Red Pitaya I used kapton tape over everything I didn't want to blow away and it seemed to work. That was the first time I'd ever attempted somethi…
  • Is it normal for "Qlen" to start off around 4-5 and creep up to 19-20 after a few minutes? That's what I see happening, along with the underruns.
  • I've had wifi working for a while, and it's pretty good. I do occasionally find that it's disconnected (not sure if the beagle/kiwi is locked up or just wifi, I fix by a power cycle). I also notice audio buffer underruns, but I notice this on othe…
  • For what it's worth, my kiwi is on a 190m beverage. I have a big 200m+ delta loop I use for transmitting ~800W. One leg of the delta is nearly parallel and about 15m away from the beverage at the kiwi end. I've installed 1N4148's diodes on the ki…
  • I did manage to get a wifi USB adapter (MT7601 chipset) working on my BBG/kiwi which solved all of my ethernet-related noise problems. It's also quite convenient to only have to run power out to my barn where the kiwi is. It was quite the challeng…
  • I've noticed this too. If I load the kiwi from my external address, it works. Sometimes the extensions will not come up and if I refresh the page, then it doesn't connect. If at this point I load it via the internal local IP it works. After some…
  • Thanks for the responses guys. I have some SMP1330 PIN diodes coming that I'll try out too. I believe the 1N4148s will be fine. At the moment I actually have 2x 1N4148 and 2x 1N5817 on the high-z (beverage antenna) side of my 9:1 transformer goin…