n6gn

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n6gn
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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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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…
  • 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 …
  • 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…
  • 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…
  • Rob, I think you need to update your Kiwi there. Is [kiwi]/admin:public:Antenna text reflecting something from long ago?
  • 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…
  • 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
  • I too like it, even if only as a reminder. Glenn n6gn
  • 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
  • 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…
  • Sorry, my post was confusing. I am in fact developing on a stock KiwiSDR with a BBG. I won't move to an AI until I sort this one out. Supply is OK so that's not the issue. However I'm now investigating USB client/host signalling. The BBG has a conne…
  • Stu, Could be part of the issue I'm seeing. Others have mentioned this so I'll recheck power quality. It's possible that I've degraded it with the POUSB system. There's also been a report that reloading the entire OS of an apparently functional Kiwi…
  • I've returned to examining operation using the USB port recently. I had the same experience Rob reported in that I was able to talk to the Kiwi's BB on 192.168.7.2/USB but this seems to be a complex system and I don't yet understand it. The reason …
  • I know very little about the TDoA algorithm but I suspect both @jks and @Christoph are correct. Between the limited bandwidth and especially ionospheric propagation, typical Kiwi clock imperfection probably does not become an issue. For an appreciat…
  • http://forum.kiwisdr.com/index.php?p=/discussion/comment/11323#Comment_11323 Comcast Xfi does indeed blacklist Kiwi ports in the default security mode. That has to be turned off since they added it as part of their web configuration of home routers,…
  • That's why I chose APRS as the data channel. It stays up when the Kiwi system is down, has built-in worldwide distribution and can be done with cheap hardware within amateur radio. With the Arduino as controller a whole host of sensors are similarly…
  • The family of lines in 6.5-7 MHz you suggest seem to me to be power line related, though this is true of many SMPS noise sources. When I detect in 10 kHz AM and analyze with Audacity I see astrong 50 Hz family/component http://forum.kiwisdr.com/uplo…
  • I designed and built an APRS/solar_charger for monitoring the PS at a remote KiWi site. It's not quite what you are asking for but since the Kiwi data is IP over microwave, the use of out-of-band monitoring means I can see the power situation and te…
  • In spite of the low end roll-off, I do see lines in MW that might be explained by an SMPS at ~20 kHz (bipolar transistors?) with rather wide spectral lines. By 1.6 MHz these lines are all merged and the coherence isn't as obvious but if one listens…