n6gn
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Thank you again, John. That seems to work well, I can toggle it remotely a couple of times/second now. I'm sorting out correct values and pins but it's already able to solve the problem, even in parallel with the antenna switch running normally. I…
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Thanks John, too bad but I now understand the issue. I was looking for a light weight method to control lines coming out of the Kiwi. Since I already have these brought out, decoded and used for the antenna switch, I was hoping that there would be …
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Darn, file attach didn't work. Here it is in-line: #!/bin/bash ### This bash script to sweep a kiwi and report S-meter reading ### steps through the set frequencies ### and stores the results, timestamped, in a file whose name is passed as an argum…
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Martin, I carved up a script we were using for automated noise measurement so that I could measure a start:step:stop or a list of interesting frequencies as part of examining IMD terms on a kiwi. Attached. It might not be exactly what you want e.g.…
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The splash image on http://n6gn.no-ip.org:8073/ has a schematic of a MW band stop that surpresses MW BCB by about 20 dB and allows for one additional notch elsewhere. This may protect a Kiwi from OV while still allowing only slightly reduced access…
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While it's being tweaked, an option for markers out to 1/hour or less frequent would be great. It's fascinating to watch thunderstorm level and perhaps even galactic center noise floors!
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Ron, You say "In my use of the KiwiSDR and antenna inputs, the overload from strong signals, harmonics and spurious signals, and high level noise floors, are my concern and how to mitigate these problems is my interest." I actually think t…
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Ron, Thanks for sharing interest in the Kiwi and for the encouragement but since posting my initial measurements a year ago Ive discovered what I think significant errors and dont want to let them stand. My posting was well-intended but I am now o…
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I just noticed, I must have had the same problem because the file \dev\null exists on the Windows10 computer I ran it on. Guess I must have created it to fix the problem. There's probably a better way...
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With Python for Windows (python37) installed, a command line of python kiwirecorder.py -s 10.0.0.77 -p 8074 -f 10000 m iq -L -5000 -H 5000 --s-meter 2 returned: RSSI: -59.2 Sorry, I don't use Windows much so can't help you further.
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`python kiwirecorder.py -s $HOST -p $PORT -f 10000 m iq -L -5000 -H 5000 --s-meter 10` will return 10 S-meter averages on 10000 kHz, made in a 10 kHz passband with IQ mode I've had a little difficulty with the first measurement being bogus so you ma…
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Jim said "WSPR reporting has gone astray a bit. There's now ad hoc competitions that occur to see who can spot the most uniques. Some of the methods used to do that can obscure WSPR's original intention, propagation analysis. Multiple spots for…
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Chris, Nice video. I enjoyed seeing it. It's probably a question of total energy delivered to the diodes, as John suggested. From a somewhat broader perspective, I think that lightning noise is actually what we all hope to hear with our Kiwis. Thi…
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Mains power loss can be a wonderful time for evaluating one's station. In the past I've been able to compare household, local neighborhood and ~10km square area power loss to see the results by having a station that can survive it. At that time I g…
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AD831 should be fine, though it is nice to have really good GPS reference. If you want to see one in action go to my remote Kiwi which is line-of-sight to US NIST primary frequency standards and look at the results. :) This is with the Bodnar unpr…
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I would suggest that the KiwiSDR is far more than hardware or even hardware+Software. Much of its value is around the user community, the few motivated developers and the general good will and interest of a wide base. Changing the 'specs', everythi…
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I use a Bodnar GPSDO on three different up/down converters I built for amateur radio use: 2m, 70cm and 23 cm. The more expensive one, http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=234, has two different…
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I'd be interested to see an estimate of the combined number. Have kiwis perhaps become THE major spotting device for WSPR? If so, it would seem that they may rival or exceed the impact that the U3 and other QRPLabs transmitters have had on transmi…
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"We wants it, we does" :) But you'll have to get your own since I'm not willing to part with any of my FOUR... (we're all going to need to go into therapy soon)
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This is why you NEED another Kiwi. You wouldn't have seen the grey line correlation, without all those bands running. And you DO want listen to those bands as well, don't you? I count at least 13 WSPR bands you simply must have running which mea…
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Powernumpty comments: "maybe it is just an "off the shelf" service now adding ears out there for people who want to test TX whereas before it was a bit more of a radio and hardware challenge." Look a little more closely at the v…
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That trick seemed to get past the forum file type filter. You should be able to download it, change the file extension to ".brd" and drop it on OSHPark site which will recognize it as An EAGLE PCB layout and process it for you. I hope so a…
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As an experiment I just tried uploading the PCB file as "MWfilter.pdf". It is not a PDF but the forum allows the upload of that file type and my hope is that if one downloads it, renames it to "MWfilter.brd" and drops in on the O…
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Nooelec looks perfectly fine, a lot of attenuation (too much?) and assembled with connectors. But if your needs are different and/or you want additional filtering, you can build one yourself more cheaply. I didn't mention but but I also have a PCB l…
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Right at the moment, about 1700 UTC, your Kiwi is not indicating OV but the broadcast at 7380 is showing -24 dBm which with voice peaks may be pretty close to top of ADC. I suspect that you don't need very match attenuation or notch to make this no…
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If you could plot it with the spectral display turned on, it might be easier to analyze the signal. The waterfall isn't nearly so good a tool for this.
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Holger, FB. As Jim mentioned you are doing well with the Kiwi from that site. This morning (US time) you are number 3 in Europe and the world and #1 on 30m. Rank Reporter spots uniqs 2200m 630m 160m 80ja 80m 60eu 60m 40m 30m 20m 17m 15m 12m 10m V/U…
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Holger, Thanks for catching the localization issue. We here on the 'left side' didn't notice it before now! I don't see any spots from OE9GHV-1 at the moment but if/when both wsprdaemon and kiwi-extension WSPRs are running, on a busy band I think y…
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Last night I made a measurement of the KiwiSDR LPF in situ using an HP active probe. Since this is a voltage probe, it's accuracy depends upon knowing the impedances at the reference (SMA input pin of a KiwiSDR) and the measurement point, LPF filte…
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If one of the protection diodes, z401 z402, has gone to a short, before you wipe them off it's dc coupled and an ohmmeter should show it...