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Hi John, Ah OK, I thought we had discussed this problem a while ago, but I think we must both of misunderstood what each other was trying to convey at the time. Never mind, no great concern. Regards, Martin
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Hi John, Ah OK, I think I've seriously misunderstood, how the SNR values are derived. I thought that rx.linkfanel.net simply took the internal values from the /snr URL extension. I think I've become confused by the internal and external headings on…
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Dear Martin, Thank you very much. It is : http://sdr.autreradioautreculture.com:8074 QTH : Trémolat, Sud-Ouest, Périgord, France Best regards, Philippe Hi Philippe, Now it has gone dark, your KiWi sdr score is very impressive. I think this is becau…
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Hi Artur, Please don't turn off your SNR measurements for my sake. There are plenty of others that are skewed because of masked frequency ranges. I was not specifically singling yours out, it was just that they were the best example of the underlyin…
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Well, especially since you worked so hard for it (antenna and frontend optimizations, and all the knowledge you've shared on the forum). Thanks John, But you forgot to mention all the hassle I have caused too... The KiWi is an excellent product, and…
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Attention. If I add gain... I will move to the front, to the top of the list. Ahaha ;) Best regards, Philippe Excellent, anything to improve the deployed KiWi's performance is good news. So many have poor antennas and so much noise to be almost un…
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Yeh I know, I have posted a new issue on his Github repository, but I doubt it will result in any action being taken. It's not a big issue, I just like legitimately being at number one, for most of the time :-) Regards, Martin.
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Looks like rx.linkfanel has redone his algorithm so as not to reward those stations with a ridiculously high SNR due to the large and/or numerous masked sections. I don't know if anything has changed in the meantime, but the co-sited Polish KiWi's w…
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Ah OK, understood. I just wanted to make sure you stayed safe. Regards, Martin
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There are many countries where I wouldn't consider hosting a KiWi for all sorts of reasons, and China is one of them. To satisfy my own curiosity. Is it possible, or even sensible (possible allegations of spying, or assisting an enemy state) to depl…
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An easy test is to terminate the KiWi RF input with a 50 ohm load, and see if the noise floor rises with the power supply you wish to test. If it does, then the supply is really noisy, and it will be very evident if the setup shown below is used. …
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Personally, and despite owning one, I hate the iPad, the built-in or enforced obsolescence that makes reuse impossible, plus all the associated proprietary interfaces and accessories. They are forever messing around with stuff in updates, that usua…
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I think you may have a fake. I have tested several genuine Apple 5w compact plug top power supplies, they hav a switching frequency of around 100KHz (dependent upon load), and the noise spurs tend to be relatively low on frequencies greater than 500…
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If you don't use the mobile mode or /?m the keyboard pops up on almost any action. Desktop HTTP_USER_AGENT => Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/120 Version/11.1.1 Safari/605.1.15 Mobile…
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The /?m option also selects the mobile site version. PATH => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin PHP_FCGI_CHILDREN => 16 PHP_FCGI_MAX_REQUESTS => 500 HTTP_CONNECTION => keep-alive HTTP_ACCEPT_ENCODING => gzip,…
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I'm using an iPad, and with both Firefox and Chrome browsers, if I go into the browser settings menu and choose the mobile site option, the KiWi controls behave OK, and the keyboard only pops up when alphanumeric entry boxes require input. Regards, …
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Some antennas seem to pick up less noise simply because they have lower gain and are less sensitve. As a test, I suspect that the Wellbrook will produce similar results if you use the attenuator cintrol on the KiWi 2 to reduce the signal levels to m…
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I have severe reservations about the YouLoop, and personally I think it is a triumph of marketing over actual performance, but your mileage may vary. It was designed for use with the Airspy products, which have a very low noise floor and are incredi…
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I'd agree, don't enable it by default. That will protect folks who are nervous of data protection laws and forget to turn it off. Regards, Martin
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A bit of feedback on the forced username option to start the KiWi session. I've found that some folks are just filling up the entry box with junk (or worse), so I've turned it off. Most sensible users seem to ID themselves voluntarily, and those tha…
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Yes, the PSU ramp up / settling time can be an issue, as others have found. I have built several linear supplies and the KiWi's always seem to start up OK, despite having a somewhat slow rise time. I just wanted to mention the output voltage settin…
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Hi John, Before the update that included the antenna switch in the RF control panel, in the original configuration I had set no mixing allowed. When the update was performed, it seemed to default to mixing allowed. In the admin extension panel, I se…
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I run my V1 at 5.4v output under load. This compensates for the cable, connector, and PCB resistive losses. There is 5v when measured at the Beagle header, and it starts on the application of mains to the linear PSU. I'd set the PSU volts to give …
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To make a comparison such as this, the frequency, mode, receive bandwidth and RF parameters need to be set exactly the same as each other, including the waterfall and S-Meter calibration values. Don't use the S-Mater value, the scaling is too coarse…
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The attenuator should reduce any off-air signals by the amount of attenuation shown on the slider control. If setting it to -30dB, only results in a slight drop in signal level, from S7 to S6 (which equates to 6dB) then it looks like the attenuator …
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That doesn't look good, unless I misunderstood your comment. If the internal signal generator seems to produce a signal of around the correct level, I suspect the RF input connector, attenuator or RF amplifier stage has somehow got damaged. What hap…
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Some other options here https://www.fenu-radio.ch/en-index1.htm Personally, as guidance, I wouldn't pay more than approx £100 GBP / 120 Euro or US Dollar for a commercial loop. Beware of Chinese made loops, they are of questionable quality and the…
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LKZ1AQ or Cross Country Wireless. https://active-antenna.eu/ https://www.crosscountrywireless.net/ But before you buy anything, have a look at the loop antennas IO group. https://groups.io/g/loopantennas Several KiWi owners on there, and loop P…
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Just a thought, I know it's only semantics, but maybe to alleviate the issue mentioned. Perhaps reword the "Antenna switch is not configured." to "Antenna switch not in use" to shift the emphasis from admin function, to user inf…
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I have noticed on two separate KiWi's, that with the antenna switch in the control panel, antenna mixing is allowed, until you go into the admin GUI, select the antenna switch extension then turn the mixing off, on and off again, then it performs as…