n6gn
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FWIW (probably not much but indicates my interest) under 4.4.9-ti-r25 my ebay Chinese no-name dongle containing an RTL8811AU chipset (by examination) does the same as Andy reports using lsusb -vv -s 002. The Kiwi doesn't know it's chipset either a…
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But be careful in using it. The first response, apparently averaged with any others, may be bogus and give you an incorrect answer.
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I think this is essentially the case, though actual radiation, inverse square coupling, probably doesn't happen on a structure as small as a kiwi even up into VHF. From what I've seen it is only near-field (E and M) and CM that are an issue. Glenn …
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"If the Ethernet screen and SMA screen have a decent low impedance bond, such as the metal case rather than via various routes through the PCB and standoff pillars, then the problem is minimised." But with non-zero impedance across the PC…
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Martin, The mechanism I have observed is in addition to these, looks something like this: (Image) without perfect balance (infinite CM impedance) at the far end of the (shielded) LAN or PS cable there is *still* ingress at the ADC.
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I think Martin is correct and that troublesome coupling into the kiwi tends to be conducted, common mode and maybe in some situations e-field. In the past I have used both high-Z and small loop probes as means to examine Kiwi response. With a smal…
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They other possible benefit of an external dongle is that the RF environment of the basic BB won't be altered so much. I believe jks indicated that the BB with HDMI was noisy. Adding WiFi on-board may or may not have an adverse effect but is probabl…
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Martin and W1EUJ, Thanks for the good ideas. I tend to do everything from a remote command line so didn't even consider the Kiwi console which is, of course, most accessible. By remoting in I get the advantage of history and easy copy/paste - whic…
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Claire, The steps I gave before seem to have fixed the problem for me. I am not an expert in this area either but no one has yet commented that there is a better way. To accomplish the block I first logged into my kiwi as root. I did this using se…
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Martin, I don't entirely rule out understanding the CM mechanism from LAN to ADC better and knocking it down another 20 dB but the LAN balance really isn't too bad with the hardware we have so getting rid of the wired LAN current certainly may be th…
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Martin, Thanks for documenting this. From my observations, mainly at HF, the 20-30 MHz noise that is endemic with Kiwis has a vector into the kiwi via CM noise on the LAN connection/lines. I think this is what you were addressing with the CAT5 shi…
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It doesn't, but see my caution above about throwing away the first measurement...
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In a kiwi itself rather than my router, after trying it with FORWARD, I ran: iptables -I INPUT -s 47.88.219.24/24 -j DROP iptables -I INPUT -s 184.22.160.13/24 -j DROP since I'm trying to stop packets from two different offenders at the kiwi rather …
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Chris, I wish I could find a good argument against what you suggest...
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Since we don't know for sure yet it isn't an "honest mistake", that seems pretty final. It seems to me a decision between helping kiwi owners to keep things tidy and having them exhibit appropriate responsibility. Given the rather large …
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I'm not sure it's just traffic loading. My log was getting filled and I too thought that the availability of receivers was suffering. When the offending address found a response it seems to have pounded on it fairly hard. In any even, other than h…
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My router doesn't seem to be so flexible. Is there any reason not to do this on the kiwi itself? My kiwi seems happy with it and iptables -L shows it as in place. Since doing that, I've had no more issues on a sample of three.
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I'm having it pretty badly here too. SND BAD PARAMS: sl=18 50|48|49 [2019/7/30 12:15:26] ip=47.88.219.24 #################################### Tue Jul 30 04:15:32 8d:12:53:17.283 01234567 1 W/F BAD PARAMS: sl=18 50|48|49 [2019/7/30 12:15:26…
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I'm not the one who knows this but what happens when you try http://n6gn.no-ip.org:8075/?f=25000/amn&no_wf&keys=yyyd and then select "comp" under the audio tab?
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I've successfully used older versions of Voicemeeter to do this.
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charlesh3 asked : You described your solution as a "small USB Wifi Adapter" but the TL-WR802 is a stand alone router that does not use USB except to power the router. Is that the correct model number? My hope is a USB dongle that plugs in…
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SMA ==> F adaptors DC blocks Not necessarily the cheapest but available
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While I think the biggest contributions toward things KiwiSDR may be the time and expertise of those working to develop and enhance particular corners of the project, some of these may be limited by funds. So I to like the general concept. Like Chr…
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I haven't tried it but I suspect that you could also build one for yourself very cheaply. If one examines one splitter schematic, it would seem that 4 cores,connectors and some wire might do the trick over some or even most of a kiwi's frequen…
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In reading signal strength from kiwirecorder.py it's important to recognize that like the S-meter/dBm display on the console, it 'bottoms out' at -127 dBm. For common bandwidths and antennas this may not be too much of an issue e.g. the noise flo…
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Charlesh3, "Glenn: You described your solution as a "small USB Wifi Adapter" but the TL-WR802 is a stand alone router that does not use USB except to power the router. Is that the correct model number? My hope is a USB dongle that plu…
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Well my approach was trivial. I simply set the TPLink up as a bridge, told it the Wifi ssid/pass and plugged it in. I think I did this from a web browser. That didn't even involve the kiwi. Once it was running,it passed the kiwi through to my netwo…
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I think so. So often people seem to mistake noise as "radiated", as truly inverse-square-law rather than either common mode or near-field. This matters because common mode noise can be addressed with proper system design and near-field noi…
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Yes, in my opinion there is an advantage to having wifi at the kiwi - if the kiwi is kept very close to the antenna with a very short feedline then the impedance on the path for common mode current *through* the kiwi (in one 'ground'/common and out …
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While " /sys/class/gpio/gpioNN/value" did allow toggling the lines, it seems that it is toggling more than one. I haven't studied the class to understand it and there may be a way around this, however, Gwyn G3ZIL, kindly pointed me to anot…