G8JNJ
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Power supplies have generally been the biggest cause of "random" issues, so it's always worth trying another type, with a different cable and connector, just to be sure. Regards, Martin
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How far does the Chinese filter cut into the VHF airband ? The ones I have tried seemed to be acceptable. The frequency range 108-118MHz is used for navigation aids rather than voice comms, that helps provide a bit of additional separation. For e…
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My experience of building filters like this, is that the values provided by the various on-line calculators for self-supporting air spaced inductors wound from wire, is that they are not that accurate. Even when you have wound them, and tweaked than…
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Ah OK... Personally, I wouldn't recommend that model, but let's see how it works for you, when used with your antenna. I'm not sure what device the Noolec is using, but I guess it will be something like the Qorvo QPA4363A. Rather than issues with M…
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Regarding the DX Engineering RPA-2 pre-amplifier. It's a good enough device, but somewhat expensive. I have used cloned copies of the RPA-1, which has a very good IMD performance, but the noise figure is not that brilliant, at around 6dB. As your si…
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OK interesting. I thought the loop was a lot noisier than the Apex ? When I listened with the loop connected, the noise floor was about 20db higher. I think you could safely reduce the gain on the loop without degrading the Signal To Noise ratio. M…
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Thanks for doing that. I think the Apex is better than the loop, but in both cases you seem to be constrained by local interference. I can hear and see noise from several switching supplies, possibly solar PV optimisers, plus what I think is a domes…
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Incidentally if you are at all interested in reception of Short Wave stations outside of the Amateur and Broadcast bands I can recommend https://udxf.nl/ https://groups.io/g/UDXF The files sections on both sites are valuable sources of information…
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Those are valid, and he has identified himself. It's a member of the UDXF list logging ALE networks, which requires long periods of continuous monitoring to capture stations that may only sound once an hour. I have given him passwords for my KiWi's …
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That seems to be correct. Don't forget that SSTV is quite low resolution, so I don't think you are missing too much by using that method. Regards, Martin
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There was a long thread about the Apexradio 303WA-2 some time ago on this forum. https://forum.kiwisdr.com/index.php?p=/discussion/comment/17853 The height of the antenna above ground is likely to have a significant effect on its performance. Genera…
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I tend to set the supply voltage at the DC connector, with the KiWi powered and running at 5.4v. This gives 5v at the internal header due to various voltage drops. As a result, I don't think 5.66v is likely to be outside the limits, but your issue m…
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How are you changing the size of the chart ? Is it by altering browser settings, or by some other method ? Regards, Martin
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I recently did a bit more research into the various DC filter boards that can be bough cheaply from China. I've previously mentioned the simple type with two separate inductors. Simple DC Filter https://forum.kiwisdr.com/uploads/812/O25TQCF3W754.pn…
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It's not that easy, as it depends on the source, and whatever it is connected to. Especially as John has already indicated that there is likely to be more than one source. That's why I suggest switching off your power at the main board, you will the…
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Which IP address ? Your internal network (probably 192.168. xxx.xxx), or the outward facing public IP, which will probably change unless you have paid for a fixed one. You will also need to setup your router for port forwarding. Most of the informat…
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Most likely you will, so good hunting. Oh and folks will soon be turning on their cheap Chinese made Christmas lights and decorations, so expect things to get worse for a month or so, until they get packed away again ready for next year. Regards, Ma…
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Oh dear, that doesn't sound good. However, from experience. Most noise tends to be conducted, and if it's really strong, it's more than likely to be from something in your own home, or something very close to it. If you can run the KiWi, or another …
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Can we hear the noise please ? Ideally an AM recording made on a quiet bit of spectrum. That would provide a lot of clues. Regards, Martin
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How are you powering the loop amplifier ? It is difficult to tell from your screen grab, but are there any really strong signals present that could be causing ADC overload ? If you tune to an unoccupied part of the spectrum and listen using AM, what…
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I just checked mine and the S-Meter shows the correct step sizes. It's possible the IBP steps are not exactly 10dB, or some other factor is coming into play, but if you have a V2, you can test it by tuning to a strong signal and increasing the input…
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Oh I quite like that idea. Maybe it could be linked to the user defined memories in some way too, and then perhaps a scan function could be added, with either timed or squelch controlled pause / resume. However, I think John has more than enough to…
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Ah OK, like temporary user specific DX labels or were you something else ? Regards, Martin
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Have you explored the existing user memory options ? Although it does not place markers, it does allow you to quickly recall or skip between frequencies. Regards, Martin
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Hi Shane, Whilst looking for the post I mentioned, I found this which may help. I haven't had a chance to try it myself, but it looks promising. https://veducate.co.uk/winscp-elevate-to-root/ If that doesn't work there are additional options. https…
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I don't think you will be able to get in using WinSCP. I'm experiencing similar problems since updating the OS version, and WinSCP doesn't provide the option to log in as su. I seem to remember reading a thread about it but can't find it. Also, wit…
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Having the SNR measurement switch to the default antenna (or another one that is specified) makes sense. I have noticed that my uploaded SNR measurements vary, depending upon which antenna is selected by a user at the time of measurement. Regards, M…
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Yeh, I realised you were joking. If you live in that part of the world, then I'm surprised you can hear anything other than radars :-( The Wave radar you mentioned is very strong in Europe, which is why I thought it must be located over this direct…
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Sorry to dissapoint. It's a Wave radar, but it must be a new one, as it's not on my list of European or North American ones.
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"And I think the LT1083/1084/1085 stabilizer is a very good and cheap choice." The 5A linear regulators do produce LF noise. https://forum.kiwisdr.com/uploads/768/5OYC6KSJYIJE.png But adding a big electrolytic across the regulated output…