n6gn
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>>>>. I am not sure why since only one station drops their power level. With two strong stations [30] kHz apart, you get a family of IMD 30 kHz apart - that is to say 'lots of spectral lines'. N*F1 +- M*F2. With a single strong statio…
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It's not into OV but is indicating -18 dBm on a monster 1500 kHz signal at about 1400 UTC http://forum.kiwisdr.com/uploads/315/1OEZIYDSD51K.png I'm surprised at that extreme level that modulation peaks aren't pushing it into OV even without power in…
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Show us the spectrum...
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You likely have noise current from a bipolar SMPS switching at around 30 kHz and its harmonics getting into the spectrum. Possibly the source went off at 1630 and (less likely) the coupling mechanism changed. The waterfall is not a good diagnostic …
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Notice that the KiwiSDR already has this: http://forum.kiwisdr.com/uploads/867/DV9ZK9462HHU.png
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No. Probably no more than a few loop diameters is enough to get into a slowly varying region. From my measurements at MW, moving up 10-20m probably helps SNR slightly but not grossly.
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How close does an off-Internet BB/Kiwi become if one checks "Set date from GPS" on the admin page? I think I've proven that this is fine for synching WSPR spots when portable but I don't think I've ever checked to see how accurate it actu…
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A 100W transmitter directly lnto the switch would be +50 dBm which with 60 dB of isolation (if that's the value) would be -10 dBm into the Kiwi and maybe triggering OV but not hurting a thing. I suspect that a Kiwi can take +20 dBm ( 100 mW) and p…
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I either simply do not use or remove the wire&ground antenna connector on the KiwiSDR. This is because there is significant difference between the SMA and that connector's ground paths and common mode current through it can significantly raise t…
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Ben My guess is that the source is sharp edges on a bipolar SMPS in some piece of equipment. These edges are likely producing a spectrum of 29 kHz terms but the coupling mechanism is really the question and there are many possibilities. It would be…
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It sounds like the PMIC on the BBG did what it should and saved the day for that portion. If it was me I think I'd isolatedthe KiwiSDR board and see if perhaps only the power conditioning there died. The differential choke, T301, right at the barre…
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Kevin, Yes, you can run a Kiwi with WiFi. Like most things in this arena there is more than one way to do it. Some have used USB WiFi 'dongles' with suitable changes inside the Kiwi which can be found on this forum. I chose to do it with an inexpen…
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Per Tom, WA2TP's success, I've been running BBAI/Kiwi with extensions, inside a standard enclosure for quite some time now. I've used an external fan and a 3D printed shroud to force air through which keeps the temperature in the 40's. My main reaso…
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I've run 100W transmitting in the environs of Kiwis and other receivers on nearby antennas with no damage. With care in positioning/polarizing, I've even been able to run full-duplex from a single QTH that way. I think there may generally be far l…
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Also, be aware that the S-meter 'hits the pin' and won't display values lower than -127 dBm, thus it is necessary to assure enough noise bandwidth to generate a larger reading, A 1 kHz BW though it might help dodge coherent signals may not be high e…
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Use the S-meter/dBm display not the spectrum or waterfall to measure. You need the 24 bit path not 16. Using spectrum/WF for absolute levels is risky on multiple counts. One has to keep in mind the bin width, that the signal actually landed within t…
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It's easy to make non-useful comparisons. I would like to add that Rob's comment about limiting noise floor at a quiet site presumes a matched antenna. This allows comparison with ITU noise floor values. As he implies, dynamic range is perhaps a mo…
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I have successfully run 14 channels of wsprdaemon on the same RPI4 host that ran FlyDog. I found the RPI4 to be capable even with busy bands but the Flydog needing a great deal of help to become competitive with the stock BBG/Kiwi. Wsprdaemon rece…
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In my view, the spectrum is much more valuable than the wf for a lot of measurements. Not trying to add work but if I could, many times I'd turn off WF and SWL labels and have only spectrum. There's so much information there that gets lost in color…
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Hi! Glad to have another Kiwi in a relatively under-represented area. Queretaro is new to me and I look forward to hearing and seeing what the spectrum looks like from there. My first impression is that your system is generally working (checking at…
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Yes, these are different topics but what they have in common is a mechanical support to keep the USB connectors from breaking. The same plastic piece necessary to keep the BBG power and USB connectors 'safe' can be adpated to protect the BBAI USBC c…
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http://forum.kiwisdr.com/uploads/386/YKYTD26XCKXW.png Just a reminder about: http://forum.kiwisdr.com/index.php?p=/discussion/2246/power-over-usb-modifications-for-a-kiwisdr#latest which included my offer to provide 3D print file for a clamp which …
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I've not examined recent products from the Ukraine but I can not recommend the earlier transverters. Perhaps the receive converters are different/better. How much interest would there be in the creation of a fast-switching block down-converter for t…
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http://forum.kiwisdr.com/index.php?p=/discussion/2307/flatness-of-kiwisdr-response-500-khz Phil, Addressing your noise issues and not the spectral display, I would encourage you not to immediately jump to whack-a-mole in seeking to improve Kiwi Perf…
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Rob, I think you need to update your Kiwi there. Is [kiwi]/admin:public:Antenna text reflecting something from long ago?
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Not only does the PoUSB solution, pointed to above, work for stock KiwiSDRs, but BBAI/KiwiSDRs work very well with the on-board BBAI WiFi. Either of these approaches eliminates the common mode LAN noise path described n the PoUSB document. I've con…
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http://forum.kiwisdr.com/index.php?p=/discussion/2246/power-over-usb-modifications-for-a-kiwisdr#latest describes a method that has worked well for me. See the document. Glenn n6gn
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I too like it, even if only as a reminder. Glenn n6gn
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I tested Master Electronics by ordering only a single enclosure. The process went flawlessly and the enclosure arrived as promised after 8 days. They seem to be fine. Glenn n6gn
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OK, one final post on the subject. Here's a summary. A stock KiwiSDR with only a client USB (micro USB connector) connection to an inexpensive router can be used to create a stand-alone WiFi'd Kiwi with power&Ground as well as USB data. thus av…