HB9TMC
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Thanks, jks, very much appreciated.
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Unfortunately I am still locked out from the admin page because of the interface name. I tried to disable predictable interface names as suggested here by overriding the udev rule. But it doesn't seem to be enough: [ 29.456337] r8188eu 1-1:1.0 wlx…
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@jks Would it maybe make sense to replace the interface address testing by allowing password-free admin access from any local network address? https://en.wikipedia.org/wiki/Private_network#Private_IPv4_addresses The driver of a WiFi stick which I'm …
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BTW, the non-averaging function is beautiful too: (Image) Here is a recording of the evening hour during the opening of the 630m band, where the ground-wave QRN is replaced with sky-wave QRN.
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That problem appears to be specific and reproducible to the latest 4.4 kernel, version 4.4.155-ti-r155 or one of its modules. I'm just mentioning it in case somebody else has that problem. 4.9.147-ti-r121 runs fine as far as I can tell.
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@Powernumpty Deleting the corresponding folder in wsprdaemon/signal_levels/ did the job for me.
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Also they disappear, when zooming in. Phase noise maybe.
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You mean the spikes in the HPF range (<5 MHz)? They only show up in the waterfall, they are not audible. The strong signals have also quick QSB (20 dB in 2 seconds is not uncommon) With good propagation conditions it requires 10 dB attenuation i…
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Here it is with 10 dB attenuation. I can't say if these are the same frequencies and amplitudes though. They have strong fading, the amplitude does change rapidly in the range of 10-30 dB. (Image)
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In my case the OV warning doesn't show up, even though the ADC is in overload for tens of seconds. (Image)
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Have I already mentioned transmitter Roumoules (1000 kW)? :D I'm actually using an active GPS splitter (this one) but it doesn't stop common mode noise from spreading. It does provide a bit lower impedance point though, the attached cables work …
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Pressing the mute button and setting WF-rate to "off" would do something similar.
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Issoudun has twelve 500 kW transmitters, Woofferton ten (5 x 250 kW, 1 x 500 kW, 4 x 300 kW), nicely spaced across the shortwave spectrum. Not all of them are active at the same time, anyway. I thought also about making a slope equalization filter…
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I was referring to the noise level on 40m to illustrate that I don't have much room for filters. I'd need to attenuate 7205 kHz by >30dB, in order to avoid ADC clipping. But by attenuating 30dB, the RF noise floor on 40m would fall below the rece…
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I have taken measures to suppress common mode currents on the antenna line. Common mode impedance is >1 kOhm from 100 kHz to 30 MHz. Since I have two kiwis now, things got easier. Low pass filter to one, high pass filter to the second kiwi. Only…
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Short signal and ground path is crucial. It is meant to be a cheap and easy solution if somebody only needs to notch 1-2 frequencies. The entire thing is cheaper than two SMA connectors alone (at least in HB9). (Image)
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The QRP-Labs filter boards fit nicely on the kiwi (of course changes in the routing of the boards are necessary). (Image) Unfortunately, I have too many peaks across the entire spectrum to notch.
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@W1EUJ TL-WN722N works ok for me, even with the ancient default kernel (4.4.9-ti-r25). It has a RP-SMA female jack for an external antenna. But I've bought it years ago, they could have changed the controller in the meantime. Bus 001 Device 002: I…
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Definitely not DWA-171. I spare you the details. What was that Forrest Gump quote again? "Life is like buying a WiFi stick for linux, you never know what you're gonna get"
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I had the same problem with the interface error message. I "solved" it by disabling the ethernet port temporarily: ifconfig eth0 down and then restart kiwid. I've ordered a bunch of DWA-131 but they haven't arrived yet.
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@jks I don't know what happened. Without users, I got GPS sync. With users I got high system load (not userspace), no GPS sync and lag on the web interface. I've cloned the image from the old kiwi to the new kiwi and now everything works good. Prob…
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I think there isn't much radiated noise coupled from the beagle board to the kiwi board. Otherwise we would see spurs while the antenna is disconnected. Please correct me if I'm wrong. From my experience, radiated noise is only a problem [<30 MHz…
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--S-meter shouldn't write a wave file: --S-meter=S_METER, --s-meter=S_METER Report S-meter(RSSI) value after S_METER number of averages. Does not write wav data to file. @n6gn jks explained previousl…
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In "the beginning", the antenna was connected the same way to the splitter. The signals were already a lot weaker, but I decided to take care about that later. I've restarted the new kiwi several times and made sure that nothing else was k…
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Ironically I'm having now a similar problem on my shiny new second kiwi. I use an active GPS splitter, so each device should have the same signal. The first kiwi shows a sky full of satellites, the new one shows none. It had a few in the beginning,…
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I tried to update the kernel, because my usb wifi stick refuses to work on 5 GHz. Good news is, that 4.19.50-ti-r20 is booting and the usb stick works on 5 GHz. Bad news is, kiwid doesn't start:root@kiwisdr:~# /etc/init.d/kiwid startDEBIAN 7ls: cann…
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Gain is not a good an indicator for the sensitivity of an active antenna. Too much gain can cause problems too. It should be just enough to compensate for cable and connector losses. It is also possible that the GPS antenna is picking up unwanted si…
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I measure 3.13V directly at the kiwis SMA connector, connected to a commercial timing antenna which draws 28 mA from a 3.4 V lab supply.
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Has been taken care of. Thanks @ Jim
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Does anyone have a possibility to order a Mini-Circuit ZSC-3-2+ for me? Or does anybody know a shop that sells to private customers? I have asked 9 shops and none of them could sell me one, including mouser. I pay in advance.