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n6gn
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Comments
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With both rx0 and rx1 running the same IQ extension and same 25 MHz it appears that neither drifts significantly. RX2 -RX8 continue to be listening to WSPR.
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After 1.586 with 66.60 MHz clock staying perfectly sitll, LOS to WWV25/NIST, 1.590 drifts 1 Hz/minute, clockwise on IQ extension.
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You are sure right about it being small. Even for FST4W at HF I think the spreading it introduces is fairly insignificant for almost all ionospheric propagation, though maybe for chordal propagation (an interesting mode ! ) it might start to be sign…
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Notches or, even better, multiple tracking BPFs that follow the selected rx frequencies would be even better but are more complicated and expensive solutions. Each site needs to tailor the HW to the individual problem it experiences and this probl…
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The version updated correctly on the 2nd try. I know of nothing different from first try. FT8 now showing up. Sorry for the false alarm.
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But I see the problem. Though I updated, it didn't take. Still running a previous version... Let me pursue the reason for that failure...
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Seems to be https://forum.kiwisdr.com/uploads/564/18BVLKXJAF6Z.png
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I wanted to try the FT8 and updated successfully but no FT8 option appears on Admin or User pages. I do have an (old) Antenna Switch extension present but it seems as always. What obvious thing have I done wrong? Glenn
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Wouldn't that be replicating PSKreporter? Why not just post to it and then link to their mapping?
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Would you like me to send you an 8-way isolating, active GPS Distribution board? I think I still have an assembled one left. If you are confident that there is now and always will be zero cross-polution of CM currents among Kiwis, it won't help but…
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Probably not nearly as easy an addition but <300 Hz post-detect NBFM roll-off to take out repeater tone would also help listening quality.
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Maybe I misunderstand his goal. If there is only a single antenna, the kiwi can listen to that as long as the transceiver isn't transmitting, in which case the Kiwi must immediately and safely disconnect, ALC is present for safety back up and addi…
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I've recently addressed the same problem and though I've built and tested what appears to be a sollution it is a bit scary to push the limits. My application was connection of my IC-7300 to the 0-2 GHz transverter I've also designed and built. My …
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A few stations, mainly using KiwiSDRs and among the top WSPR spotters in the world, post their noise data to the wsprdaemon.org so that plots of the previous 24 hours can be viewed. http://wsprdaemon.org/graphs/ These graphs show diurnal variation …
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Send me a small self-addressed padded mailer with enough postage and I'll send you one. I'm good on QRZ.com Glenn n6gn
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Again, thanks John. That fixed it. From the database: https://forum.kiwisdr.com/uploads/377/IBZG8BWXAYA3.png N6GN/H is now reporting the correct frequency ( modulo 1.3 Hz intentional offset to cover baseband and ext clock error on N6GN/K which is a…
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Thanks very much,John. Those changes in Kiwirecorder and the Kiwi have indeed made it possible to offset and tune a Kiwi both manually and from wsprdaemon (by way of kiwirecorder). I have been successfully and correctly spotting into the database …
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Using the new -o option in kiwirecorder followed by the output of something like: curl -s --get 'http://[hostIP]:[port]/status' | grep freq_offset | awk -F'[=]' '{print $(NF)}' may not be the best or 'proper' way to do it but it seems to work and sh…
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Thanks John, I hope to try that shortly. It would seem that all the pieces are available to make it possible. @studentkra the tunable converter for the Kiwi receiver is a subset of a full up/down converter for converting any 10-30 MHz HF radio in …
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Yes, I know that managing the offset separate from Kiwirecorder - running it only at an IF works to get the correct audio but it does it with incorrect frequency. I'm presently doing this but this causes a problem with wsprdaemon which has correct…
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In general mono-poles, whether large or 'whips', tend to be difficult to use because of common mode noise current ingress. See a note I wrote about this and other SNR issues Here. While semi-solutions of the form "use this ferrite, with this …
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Is it any use to change the port to something that has never been advertized or do these bots do port scans looking for a Kiwi? It might be worth trying some out-of-the-way port number, particularly so if some other measure such as Uncomplicated Fi…
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Having labeling on frequencies >32 MHz would be a benefit when a Kiwi is used with the broadband downconverter such a the one I have designed and built, as well, however, I have no idea at all whether the return would be merited by the effort it …
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The other reason to power through the bbai is that the filter inductor on the Kiwisdr board runs way over spec when powering the bbai. It will eventually fail.
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FWIW, if you are to be messing with CTCSS it would be great to NOT hear it on demodulated NBFM. As far as I can tell, there is no post detection HPF available available. But perhaps that can be accomplished with host computer system audio settings …
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Somehow waterfall displays have become all the rage, however I find a calibrated spectrum that reveal at least relative levels of all signals within a bin to be far more useful. But then I come from a spectrum anaylzer background, some people like w…
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Is there a way to turn the spectrum display on prior to saving a waterfall? That is far more useful and informative to me than just the wf alone.
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"coax picking up some noise" probably means that CM current into the coax is creating IZ drop across the Kiwi ground plane. Conversion from current through the Kiwi 'ground' to equivalent differential input at the Kiwi preamp 50 ohm input…
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Joe, Certainly try it with and without the center tap connected to something. However do recognize that the amount of balance needed to push CM current contributions below a Kiwi's noise floor may take a lot more balance than typical hardware can pr…
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Try a MiniCircuits T1-1 located right at the Kiwi. It has about 1 pf interwinding capacitance and a low end that will almost make it to 100 kHz. The dipole (what size?) no doubt has a great deal of mismatch loss at LF but ITU noise floor rises fas…