Our SDR online list: https://sdr-list.xyz it also lists websdr's that want to be listed. The API is open for anybody.

Recent posts

#11
Show your websdr to others / Re: ORSAT by F1NSK is online
Last post by F1NSK - Sep 11, 2026, 06:36 PM
Simplified GUI !  :D  :D
#12
PhantomSDR / Re: Upgrade to PhantomSDR+ v.4...
Last post by F1NSK - Sep 11, 2026, 06:27 PM
Hello Guy's

If you have no signal on your own Phantom, diversity don't work....

Stay in searching state...

Try to unplug your antenna...

73's
#13
PhantomSDR / Re: Upgrade to PhantomSDR+ v.4...
Last post by George25 - Sep 11, 2026, 06:19 PM
Update 4.0.0 is great! The "Receive Diversity" helps amareur operators as well as SWLs during QSBs.
A nice feature is the scanning tool, in order to seek signal(s) quickly!
The installation process is so quick!

PhantomSDR+ has became mature for everyone to use!!! :D
#14
PhantomSDR / Re: Upgrade to PhantomSDR+ v.4...
Last post by 9a7aof - Sep 11, 2026, 02:10 PM
It was a clean install for me, it took 16 minutes,
I had the configuration files ready.

Everything is working fine. :)

Darko, 9a7aof
#15
PhantomSDR / Upgrade to PhantomSDR+ v.4.0.0
Last post by Emmanuel SV1BTL - Sep 10, 2026, 09:15 PM
New in v.4.0.0
  • Two-site receive diversity. Pair your receiver with a second one somewhere else and listen to whichever site currently has the better signal, so a fade at one is covered by the other. The second receiver can be another PhantomSDR-Plus, a KiwiSDR, an UberSDR or a WebSDR — the first three need nothing at all beyond the listener's browser, and only a WebSDR needs a small relay on your own server. Alignment takes about fifteen seconds. Full section: docs/RECEIVE_DIVERSITY.md.
  • A channel scanner, on the Fine Tuning row. ◀ ■ ▶ walk the receiver channel by channel until something is there, stopping on anything a chosen number of dB above the band's own noise floor — a relative threshold, so one setting keeps working as conditions change through the day. Scan Band follows the band plan and Scan Visible follows exactly what the waterfall is showing; the step and the channel grid follow the mode, it resumes by itself when a channel goes quiet, and a lockout button drops a birdie for good. All of it is local to the listener's browser and never moves the receiver for anyone else. Full section: docs/USER_GUIDE.md under Basic Operations → Scanner.
  • Changes in FT4 & FT2 decoders. FT4 and FT2 now aim at the middle of the range the decoder can really search. FT8 is untouched: it was never near its limit. JS8 is untouched too — its decoder widens its search to match the window, so all five submodes were already correct, and both were re-measured to confirm it.
  • Changes in Mobile Phones' Audio. Mobile Phones now run their audio at the rate the device actually wants, and the conversion from 12 kHz is done inside the page instead, by a proper polyphase filter that carries its state across packet boundaries. That last part matters more than it sounds: converting each arriving packet on its own leaves a discontinuity at every packet edge, and a discontinuity repeating at a steady rate is an audible tone rather than a click. The filter was measured across three output rates before being used — no discontinuity at any block boundary, spurious content below -60 dB.
  • Two new manuals, in all seven languages and in the offline PDFs. docs/Aether_config.md for the KiwiSDR bridge — every [kiwi_emulation] key, audio level, the S-meter, the waterfall rate, and a symptom table — and docs/RECEIVE_DIVERSITY.md for diversity, including the WebSDR relay and how to be a good guest on someone else's receiver.

Receive Diversity will immediately run for PhantomSDR, UberSDR, KiwiSDR servers.
For **P.T. WebSDR** servers, installation must be performed using the `setup_websdr_relay.sh` script. This configuration requires an additional network port to be opened in order for WebSDR servers to operate correctly with Receive Diversity. Please read the installation instructions carefully before proceeding.

For sysops upgrading from **v3.9.0**, please download the `.zip` archive and replace all existing files in:
~/PhantomSDR-Plus
After replacing the files, make sure that all `.sh` scripts are executable, then recompile both the backend and the frontend.
Because of the file-size limitations of this forum, the updated documentation is not included in the uploaded archive. You will need to download the documentation separately from the repository. It is strongly recommended that you do so, as several help files have been updated and new documentation has been added. These files contain important information related to the new features and configuration options.

A sample server list for use with Receive Diversity has also been uploaded. The list is provided as a `.json` file. You can save it anywhere on your local system, edit it to include your preferred servers, and then import it directly into the Receive Diversity window.
This file is user-specific, meaning that each user should create and maintain their own personal server list according to their preferences.
#16
NovaSDR / Re: Nova Founding Program
Last post by magicint1337 - Sep 09, 2026, 05:16 PM
I don't think there's anything left for me to discuss with you. Ever since you switched to another WebSDR, your WebSDR has essentially been inactive.

I prefer to work with people who are willing to provide constructive feedback without being hostile or angry. This approach works well for me.

I'm not competing with anyone. I develop open-source software because I want to help people and contribute something valuable to the community. I'm not in competition with any other software, UberSDR, or anything else.

In fact, I actively support other projects as well. I have already submitted a PR to UberSDR that fixes a major security vulnerability.

I'm not here to cause harm, create drama, or compete with anyone. I'm simply here to build, help, and provide value to the community.
#17
PhantomSDR / Re: Receive Diversity Tool
Last post by Emmanuel SV1BTL - Sep 08, 2026, 08:12 PM
Well, now we test it (me, Darko, and George).
I hope until the end of the week it will be ready.
I am also working on audio of the mobile GUI, trying to fix some audio bitrate issues.
#18
PhantomSDR / Re: Receive Diversity Tool
Last post by F1NSK - Sep 08, 2026, 07:51 PM
When in the PR ?
#19
PhantomSDR / Re: Desktop PhantomSDR+ Applic...
Last post by Emmanuel SV1BTL - Sep 08, 2026, 06:03 PM
UPDATE v. 3.0

Bugs are corrected.

Please download the version for your OS from here: https://www.dropbox.com/scl/fo/kjwj96zg3kj7dgq4fjef9/APnA3c9hhv4hk3YMGIGjH7s?rlkey=jfiwklly63kv73poalx631pk3&st=9a0lu6pp&dl=0

| System | File |
|---|---|
| Debian, Ubuntu, Mint (64-bit PC) | `phantomsdr-plus-desktop_3.0.0_amd64.deb` |
| Raspberry Pi OS 64-bit, Ubuntu on ARM, any 64-bit ARM Debian | `phantomsdr-plus-desktop_3.0.0_arm64.deb` |
| Fedora, Arch, openSUSE, any other Linux (64-bit PC) | `Desktop-PhantomSDR-Plus-3.0.0.AppImage` |
| Any other Linux on 64-bit ARM | `Desktop-PhantomSDR-Plus-3.0.0-arm64.AppImage` |
| Raspberry Pi OS 32-bit, any 32-bit ARM Debian | `phantomsdr-plus-desktop_3.0.0_armhf.deb` |
| Any other Linux on 32-bit ARM | `Desktop-PhantomSDR-Plus-3.0.0-armhf.AppImage` |
| Windows 10 / 11 (64-bit) | `Desktop-PhantomSDR-Plus-Setup-3.0.0.exe` |
| Windows (32-bit) | `Desktop-PhantomSDR-Plus-Setup-3.0.0-ia32.exe` |

Please uninstall your previous version, before installing the newer one.
#20
PhantomSDR / Re: Receive Diversity Tool
Last post by Emmanuel SV1BTL - Sep 08, 2026, 11:42 AM
Quote from: F1NSK on Sep 07, 2026, 08:06 PMSynchro issues
Hi Eric,
There are not issues when the two receivers start with a 'heard' signal, so to be synchronized. Then and after synchronization, you can move everywhere on the band(s).
Try for example 14074 KHz USB (FT8) where almost all SDR's are detecting a signal. Synchonization after around 20-30 sec. and then QSY freely.
Powered by EzPortal