G8JNJ
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As Glenn has commented, don't try to bother with impedance transformations at the KiWi, do it else where. If you want to build a simple passive broadband antenna, try something like this experimental design I originally posted elsewhere. https://for…
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The Coilcraft SWB1010-1-PCL 1:1 40KHz to 175MHz with no centre tap may be promising. I just measured a SWB3010-1-PCL with centre taps and that came to a value of 6pF. There is also the SWB1010-PCL which has a very impressive bandwidth of 5KHz to 100…
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I've just measured some Coilcraft transformers on the bench. All the primaries and then all the secondaries were connected together with short conductors, and the capacitance measured between the primaries and secondaries. WB1-6TSL_ 1:1 with no cen…
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From memory I think 'click to play' was implemented after a Windows update some time ago that prevented auto play. These days I think the main issue may be that some browsers and virus / spyware / malware protection, automatically block, or can be …
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Another though of mine was to compare signal levels over a short time period and generate a delta value. A large change would indicate a fault. Plotting FFT bin changes over a 24 hour time period would give an interesting view of day / night propag…
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I did wonder if the existing SNR measurement could be used to produce not only an 'antenna broken' message but also a propagation prediction, especially on the HF bands. https://forum.kiwisdr.com/uploads/103/O8ZO1QKDP68G.png This example, grabbed u…
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/14201#Comment_14201 First, would you please make the order of items in the band combo box selectable, so HAM bands could be at the start? I think you can already do that by editing the order …
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As Glenn has mentioned "Generally a 1:1 transformer like a Mini-CIrcuits T1-1 located right at the SMA is a good starting place. These transformers have no more than about 1pF of inter-winding capacitance - the path which CM noise must traverse…
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I see this on many strong Broadcast Stations, especially those using a lot of audio compression and processing such as Rock stations. The transmitter will regenerate the side-bands if pushed hard enough, due to a combination of factors such as the p…
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v1.517 May 3, 2022 Made spectrum color bar mode run as fast as "slow dev" mode. Left slow dev button in for now even though there's no reason for it anymore. Hi John, Thanks for the latest updates, much appreciated. I must admit that I…
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Hi John, An excellent set of improvements to the GUI, the frequency display is now much easier to see and the A/B vfo and memory options are great additions. Maybe also include the cursor frequency readout on the spectrum display, as I tend to use t…
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It may be that he didn't intend the KiWi to be public. His adress is listed on QRZ.com
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/14064#Comment_14064 Hi John, Thanks for your help, however I've still got some problems, which may or may not be associated with handling of some 'continental' alphabet characters which seem …
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Hi John, Sorry, but the CSV import is not working for me, as I keep on getting "File upload: Communication error" whenver I try to upload a file to a remote KiWi. I initially thought that I had modified something in the file that the KiWi …
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Ah OK, thanks John. At least it wasn't just me, I'll do a manual update. Thanks again for all your hard work and dedication. Regards, Martin
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Hi Jim, Ah OK, understood. I guess that's a bit tricky without specifying each one. As a work around, could you use the new import and export feature to be able to externally edit the required Schedule fields en-mass ? I think some sort of block edi…
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Hi Jim, "Adding the time schedule feature to the DX type menu" I think it's got what you want as a new feature in the DX label editor, but it's not (yet) in the admin page 'list' style editor. https://forum.kiwisdr.com/uploads/487/B315UNO…
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Hi John, Me, again... I like using the DX labels as a personal logbook of what I've heard, so I apologise in advance if this is only applicable to me and my type of use, but here goes anyway... I notice that where the colour choices are shown in the…
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Hi John, Thanks for fixing that so quickly, it all seems to be working now, and the TDoA also seems to function as it should. Maybe add the EiBi colour scheme / categories to the DX labels editor as a default / starting point, conversely would it al…
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OK, that did work. Time for some experimentation. Thanks, Martin
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I edited the file openwebrx.min.js but still no change. I'm not a software guy, so it's probably just due to my lack of ability. Thanks anyway. Regards, Martin
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/13901#Comment_13901 This didn't work for me. Where is the openwebrx.js file located ? I edited the one in <root>/root/Beagle_SDR_GPS/web/openwebrx directory. Regards, Martin
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You can generally 'tame' switched mode supplies on frequencies > 1MHz, by the use of suitable screening, capacitors, inductors and ferrites. However as Glenn has already indicated at length, the main problem is common mode noise, and the 'ground'…
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Hi Ben, Yes I was aware of it, as I just mentioned in another post. But it would be nice to have in integrated into the KiWi so that you only need a device with browser to run it. It also avoids having to swap between different applications when a …
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Hi Jim, Thanks for that, I had seen it before, and I can see the application WRT a 'scan' list, but from my perspective it just emphasises the two points I made earlier in the thread. It's a lot easier if you are familiar with the OS and terminology…
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Hi Jim, No I haven't really done much with the kiwiclient suite, but maybe I should. However I have two problems to overcome before I can do this. I'm not a software / Linux kind of guy. Limited documentation that would assist a 'newbie' to get it u…
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Hi Jim, I think that is how it is already organised, but it's not my site or network, and there is a LOT of radio kit and automation in operation. I'm just a lucky tenant who gets to share the infrastructure :-) Regards, Martin
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Hi John, We didn't prove it 100%, but it is likely that an admin connection had been inadvertently left open by the site admin. There are 8 Kiwi's on the same site, plus a lot of other remotely operated kit, so it's quite easy to become confused ab…
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Some countries and administrations are more restrictive than others, so it is a valid requirement. The current 'masking' option can facilitate this if required, so I'm not sure what else is needed. I think if it was me, and there was a 'political' r…
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Does this also require a 'cross-over' Ethernet cable, or are these things no longer needed with modern PC's ?