jks

Welcome to the new KiwiSDR forum, hosted on kiwisdr.com and running the latest Vanilla 3.3 forum software.

All of the forum content from valentfx.com was copied over including attachments, avatars, inboxes etc.

The most problematic issue will be external links from other places pointing to specific forum posts. Forum links were previously of the form valentfx.com/vanilla/discussion/... and need to be changed to the form forum.kiwisdr.com/discussion/... This is of course impossible for immutable (non-editable) content like links embedded in Twitter tweets. It was not possible to automatically redirect references from the Valent forum for various reasons. So if you have editable links into the old forum please update them. However, links to old posts on Valent will continue to work as long as Valent hosts the old KiwiSDR content.

Also, the time to edit your posts is not limited on this forum (previously the limit was one day). So if your post contains a link back to Valent you can simply edit it to correct the link per the above. In theory this shouldn't be necessary as the database was scrubbed very carefully to update all the links.

The forum has a slightly different look but basically the same features. The biggest change is editing posts. There is no longer a "preview" button. When using the new paragraph icon on the left margin, and also when double-clicking on words and making text selections, the formatting changes are immediate. It is a "what you see is what you get" (WYSIWYG) interface. Experiment and you'll see how it works.

The search box is at top right. Use the "Mark All Viewed" button on the top bar as all the previous viewed information has been reset.

If you are having any problems (e.g. can't login, can't post, getting error messages, etc.) please email support@kiwisdr.com

Today's v1.427 release adds a "frequency scale offset" field for each antenna on the admin page, extensions tab, "Antenna switch" entry. After updating to v1.427 you must also install the latest version of the antenna switch extension from github.com/jks-prv/KiwiSDR-antenna-switch-extension

When any antenna is selected the new offset values will be used and completely override (and overwrite) the offset value from the admin page config tab. A value of zero means no offset, so the usual frequency scale of 0 - 30 (or 32) MHz.

Any active user connections will get a popup panel requesting a page reload when the offset changes. No offset change is made when "antenna mixing" is enabled because it isn't clear what to do in that case.

From the CHANGE_LOG file. The user interface is definitely rough, but at least you can give channel nulling a try in this update.

To null, use SAM mode and select the "audio" tab on the main control panel. On the bottom SAM line you should find the "channel null" menu. Select "null LSB" or "null USB". Make sure the PLL carrier is around 0 Hz (+/- 100 Hz maybe). If it's way off then make sure you're tuned to the station center frequency, switch to AM mode briefly, then back to SAM. The PLL should lock.

Use the spectrum function of the new "FFT" extension to visualize the nulling result. It's best to put the spectrum/waterfall aperture mode on manual so the spectrum doesn't rescale on you when the signal is nulling. You can enable the peak detect ("Pk" button) on the WF tab to see the difference. Because the nulling is happening in the audio path the regular waterfall and spectrum signal levels are not effected. Same for the S-meter. And currently same for the FFT and integrate modes of the FFT extension, although this might change.

Hi John. Not sure what might have happened. The TDoA station list is generated dynamically by the same process that generates the rx.kiwisdr.com list, which in turn causes map,kiwisdr.com to be updated.

But the reference station list is static, and it disappearing would indicate more of a kiwisdr.com web server problem or Internet problem. The web server logs for the refs.cjson file at that time are:

[23/Jul/2025:12:13:29 +0000]

[23/Jul/2025:13:20:42 +0000]

(all UTC) So, the web server didn't see any requests at precisely 12:36Z. So my guess would be a temporary Internet routing problem between your location and tdoa.kiwisdr.com (same server as kiwisdr.com).

I didn't initially want enable the proxy service by default for Kiwi-2 (because of all the backend overhead/cost it incurs). But I got talked into it because so many people have Internet service with no incoming connections allowed these days (essentially anyone in the US and anyone on Starlink).

v1.7 includes the source code of the "chunk" package that was removed in Python 13 and replaced by "chunkmuncher". Which then could not be installed in all versions of Debian 13 (including a new package called "standard-chunk").

Including the source directly should eliminate all these problems (hopefully).

And... I think I see what's wrong. IPv6 link-local address are not being recognized as valid local addresses due to a very simple bug. I wonder why I never saw this before?

Anyway, thank you very much! Will be fixed in the next release.

Only for the audio. Waterfall is completely separate. How is this not understood after all I've written about it? E.g. https://forum.kiwisdr.com/index.php?p=/discussion/comment/21295/#Comment_21295

Wide-bandwidth mode (relatively speaking) supporting SDR++ is/was an experiment. It is not being worked on at present. Too much other work of immediate impact to customers going on.

Well, now hold on. You should have mentioned your exact application at the beginning.

Something the Kiwi does do is allow precise GPS timestamping of the audio stream. This is how the TDoA direction finding application is able to work. Now post-processing the audio, extracting the timestamps and synchronizing the audio samples from geographically dispersed Kiwi is not a trivial task. But it is essentially what TDoA does.

So if your goal is to measure time-of-flight of LF/VLF static crashes (a la Blitzortung.org) then there might be some hope. But it will take some moderately complex programming.

Okay, that document now has copies of the default stored .json and .csv database files you can download.