G8JNJ
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- G8JNJ
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Hi Ulli, "- 60eu not defined ?" I don't think that matters as 60 is close enough to correct for 60eu - but it my matter if 60eu is defined somewhere in a lookup table. "- positive numbers need to be +" Again I don't think it …
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Hi Rob, I'm now trying to calibrate my noise measurements in order to compensate for antenna gain and pre-amp / filter gain loss. I've been trying to understand the setup in wsprdaemon and the example you gave earlier in this thread - but I'm gett…
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Hi Rob, Ubuntu Yes that fixed it all now OK - Thanks guy's. Regards, Martin - G8JNJ
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Hi Rob, /tmp/wspr-captures/uploads.d/ wspr_spots.txt contained lists of some stations spotted earlier, but is now empty curl.log contains /home/martin/wsprdaemon/wsprdaemon.sh: line 2232: curl: command not found uploads.log contains Wed 30 Oc…
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Hi Rob, With excellent help from Stu, I now have wsprdaemon running on a VM image on my PC. It all seems to be functioning correctly, all the processes seem to be fine and I can see noise graphs being updated etc. The only bit that I can't get to…
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> >Surely not physically stacking boards as that won't work due to power and SPI addressing and bandwidth limitations > Er........ OK, so that's not possible after all. I guess aggregating is the next best option. Regards, Martin - G8…
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This is a very interesting development. Do you think the new BBAI would have enough 'grunt' to support stacked KiWi boards, as was previously discussed a long, long, time ago. Regards, Martin - G8JNJ
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Agreed , please continue :-) Regards, Martin - G8JNJ
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Hi Basil, I'm not a network Guru, so I'm sure others will pop up to help. Looking at the screen grabs there seems to be a conflict of IP addresses. 192.168.1.222 seems to have been set manually in the KiWi, but for some reason your router is seei…
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Hi All, Over on Simon Brown's SDR radio IO Group, he's just mentioned the Voice Activity Detection (VAD) component of Rnnoise, and thinks that it may be worthy of further investigation. https://people.xiph.org/~jm/demo/rnnoise/ It's written in C …
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Hi Stu, "I wouldn't bother Martin, I'm sure you wouldn't enjoy it, all those nasty spots you'd probably get and having to upload them and everything.." Ha - well I'm already uploading a reasonable number, but it's the noise measuring par…
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Hi John, I fixed it :-) It's a problem with Win 7 Pro when the Windows classic desktop theme is used. Switching to W7 default solves the problem, but I've always hated the rounded Icons........... Regards, Martin - G8JNJ
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HI, It's possible to use an external 12v supply. However adding a 1000uF 16v electrolytic across the secondary of the big common mode choke in the "Biasing Tee" removes just about all of the unwanted noise around 60 & 120KHz emanatin…
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Just a thought, Could this be another power supply issue ? I've seen something similar in the past, when the power supply I'd been using turned out to be not quite up to the job. It worked fine for a while until I started having intermittent and…
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Hi All, Well despite the rain I put the MLA-30 up in the air today. It's a pretty poor performer, as the noise floor is about 20dB higher than any other active antenna I've tried, and increasing the amplifier gain doesn't help improve the Signal t…
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Hi All, Well the MLA-30 'sort of works' and it doesn't cost very much, so it's better than nothing for folks who don't want to build their own. You get quite a bit for your money, and it's OK for use with say and RTL dongle in direct sampling mode…
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Hi John, Yes I think that's about it. I just mentioned it in case others notice the same problem. Thanks, Martin - G8JNJ
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Windows 7 pro 64 bit
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Hi John, Yes, the same thing occurs when mousing over the tooltips. Turning off the Hardware Acceleration Chrome advanced settings doesn't fix it, although it may have slightly modified the behaviour but it's difficult to say definitively. Regard…
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Hi All, I saw the article yesterday and was going to post on the subject, but John beat me to it :-) It's a very interesting concept and it got me wondering if the KiWi network could be used in a similar way by taking advantage of KiWi's when they…
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I think it has to be just from the local network. Exposing the data to anyone is very problematic for all sorts of reasons, and could in some countries even put users at risk. Regards, Martin - G8JNJ
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Hi Chris, Can you further clarify what you mean ? That information is already on the Admin Status page, do you want it adding somewhere else or reformatting in some way ? Regards, Martin - G8JNJ
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Could this simply be someone using a VPN that assigns a new IP address each time it reconnects ? Regards, Martin - G8JNJ
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Hi Stu, Matt has kindly offered to send me his boards so that I can test and perhaps reverse engineer them :-) I'll keep you updated. Regards, Martin - G8JNJ
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Hi All, I see that RTL-SDR.COM have mentioned the MLA-30. https://www.rtl-sdr.com/reviews-of-the-low-cost-mla-30-wide-band-hf-magnetic-loop-antenna/ Best of all, on one of the sites mentioned Matt, M0LMK has boiled away the sealant goo and reveal…
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Some additional notes on LZ1AQ's pages http://active-antenna.eu/application-notes/receiver-front-end-protection/ Regards, Martin - G8JNJ
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Hi Glen, The GALI-74's and PGA-103's do not like it up them, and I've just recovered a GALI push pull pair in a loop amplifier that has blown up for the second time this week, and there's no lightning about either. The problem with nearly all mode…
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Hi Nick, I'm using several types of active and passive antennas and I occasionally TX using a wire antenna that runs within a few metres of the antennas at power levels of up to 250w. I have 1N4148 diodes on all my RX inputs (including the KiWi's…
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You may need to uninstall it first https://github.com/OH1KK/KiwiSDR-antenna-switch-extension#uninstalling-extension You may also need to manually delete the switch extension directories before reinstalling, otherwise it thinks it's already install…
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Yes for various reasons most loops tend to favour frequencies below about 10MHz. A simple amplitude equaliser can fix this problem be reducing the level on the lower frequencies without unduly affecting the overall S/N ratio, as the natural noise f…