KA7U
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- KA7U
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Comments
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@Glenn The lazy boy way, change out the KiwiSDR and see what happens with a different unit in the position. Same failure, then issues with power at the site. Works fine, then issue with the old BBG network port or whatever. Ron KA7U
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@n6gn Glen, you no doubt have this accounted for, but I'll throw it into the mix. When the power comes back up, do you have a switch to prevent a low power start on the KiwiSDR? If the KiwiSDR startup voltage sags, it boots but doesn't complete the…
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@jks I checked to see what happens if the /etc/rc.local is setting the speed. I set the admin network speed to 100mbs and rebooted the KiwiSDR. After it came up the admin network tab showed the 100mbs but the kiwiSDR was set at 10mbs. So apparently…
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Syllabic squelch would be nice. Currently I set the Threshold in the AGC panel to subdue the noise floor and find that a minimal voice will be audible if the audio gain is turned up. It isn't as elegant, but probably misses less weak signals. The on…
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elitedata, I picked the strongest spur location. I notice the spur strength varies from one unit to the next. Not sure why, but I suspect the antenna is picking up the spurs and it depends on the sensitivity of the antenna where the spurs are the st…
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The 10mbs speed certainly is effective. Now if I could only find and eliminate the remaining spurs. Hi Hi Ron KA7U https://youtu.be/4SDlS2X5WII
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I'm listening to http://ka7u.no-ip.org:8075/?f=1010.00/18kiqz7 and sounds great to my deaf ears. But the URL is not presented with the green arrow in the control box. (Image) Ron KA7U
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I use openVPN for remote access. It is amazing how many bots hit the openVPN trying multiple ports. It has been going on for a few years, but so far the lock has held. So I still trust openVPN running on an Asus NT-16 router. Ron KA7U
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Wow! I would have been concerned too! https://www.youtube.com/watch?v=1DuJ9q2nzR4 Ron KA7U
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@alain_ Dreamed about my comment on the commercial balun/power board and remembered problems I found with the CAT6 shield to RJ45 connection. So I took another look at that commercial LZ1AQ balun. There is no difference visible between the waterfa…
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Alain, You have a fine business receiver. Lots of good and readable signals. The problems you have will get reduced as you get to it. It is a process. Ron KA7U
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Alain, Intermittent is the worst. Your KiwiSDR is currently working, so that is something to consider. Last night the noise on my dipole was horrible, and this morning it was still horrible. I checked the feedline out to the antenna, then started in…
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I think those clean bars are caused by balun sense (phase) mismatch, but I'm guessing. I'm going to watch this thread and learn something. Hi Hi Ron KA7U
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Alain, I wonder if the KiwiSDR was updating after the new install? If that isn't it, I'd take a hard look at the network cable connections from the router to the KiwiSDR. Sometimes the crimp connections on the RJ45 jacks and plugs back off or didn't…
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Alain, I have the commercial version LZ1AQ. It is not currently in service, but it works much like yours on a 120cm diameter x 1" copper pipe loop. I do not have LW broadcast stations, so MW are the ones that overload my antenna here. Generally…
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Antenna is a 120cm x 1" copper loop with a differential LNA, receiver is a KiwiSDR, frequency is 11695KHz, time is 01:00utc,12/27/2018, grid DN14lf west of Weiser, Idaho. CNR-1, Dongfang Hainan. Ron KA7U https://youtu.be/fwrOc4DVfVw
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Drop Ended Interested in this drop? Hit "Request" and you'll be notified when the drop is available. 600 REQUESTS 213 SOLD Hello!! Way to go John! Must have been all my videos posted on the Facebook group "Shortwave Radio Station Lis…
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@rrobinet That is much nicer formatting than using a cat error message! Ron KA7U
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Chris, The KiwiSDR provides 10KHz of IQ., and up to 3.1485KHz of USB bandwidth. WAV files can be combined with SOX, but it seems to be a lot of additional effort to try to capture 40KHz at once. I'd use a different SDR or work with the 10KHz IQ. I …
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@njc Nick, I'm sorry about being late getting back to this. Busy social life here. Hi Hi I think this will work for you: #! /bin/bash # for kw in 107 138 119; do sshpass -p password ssh -q root@192.168.6.$kw cat $kw /var/log/messages |grep -E …
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Nick, I shutdown the PoE on the ISP antenna. No difference in the spur amplitudes. Ron KA7U
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@njc Nick, I added the ethtool -s eth0 speed 10 duplex full , to /etc/rc.local and it works just fine. A review of /var/messages after a reboot, shows no issues with eth0 starting, stopping and restarting with 10mbits. So this is one of the best sp…
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Nick, I think 10mbits will run the KiwiSDR. I applied the ethtool utility with your parameters to my KiwiSDR's. The first one was imperceptible change, then the 2nd one showed improvement on the KiwiSDR that has the most interference, then the 3rd o…
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@njc ron@linux-4cdz:~> cat recent_kiwi #! /bin/bash # # for kw in 107 138 119; do sshpass -p password ssh root@192.168.6.$kw "awk -v kiwi=$kw '/ARRIVE|LEAVING/{last[\$8]=\$0} END {for (i in last) print \"kiwi\" kiwi \": \&qu…
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I settled on a bash script file to run it. The file resides on my local computer so no worries about the KiwiSDR updates affecting it. Ron KA7U
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I tried to alias in .bashrc, but it doesn't like ' and if I use ` it seems to load with source ~/.bashrc but the script doesn't run. alias recent_users=`for kw in 107 138 119; do sshpass -p password ssh root@192.168.6.$kw "awk -v kiwi=$kw '/AR…
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Rob, I added a couple of statements to allow for passwords instead of keys and dropped the LEAVING lines. Do you think I have it correct or am I missing something. This syntax is taxing. (trusty)ron@localhost:~$ for kw in 107 138 119; do sshpass -p…
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Clint, Thank you for the informative reply. I mis-stated the frequency of the spurs. They are around 18250KHz or 18.25MHz. I am sorry about that and I've corrected my post in this regard. I have used large Toroid chokes, but I'm finding good resul…
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ka7oei, OK, I have been experimenting to find the best configuration. I terminated the receiver end of the CAT6 FPA cable into a shielded RJ45 plug and used a balun board with a shielded RJ45 jack. The interference level dropped to a low level as co…
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Yesterday I made up 6 RJ45 to BNC balun boards for my loop antenna projects. I've been using plastic RJ45 units that plug in vertical to the board. I bought a bunch of shielded RJ45 PCB sockets and used them on the 6 new boards. When I tested the ne…