Hello. You are on the page of Tambov SDR, which is available at: https://sdr.radiorubka.org/. WebSDR for the 3 MHz range is here: https://3.radiorubka.org/. WebSDR for the "80 meter" range was launched in the test: https://80m.radiorubka.org/. You should not save links with ports 8902, 8903, etc. and links like sdr2, sdr3, sdr4, sdr5.radiorubka.org! In the future, my SDRs on these links may not be available. The links above are the only correct ones. On the websdr.org website, ports are indicated due to the ancient verification mechanism. It is unknown whether the author of WebSDR will ever change it. You need to start searching for a free kiwisdr from the domain https://sdr.radiorubka.org. You will be redirected to one of the available ones in the chain. But if you persistently enter sdr4, for example, you will have fewer chances to get into a free channel. The mark on the map http://rx.linkfanel.net/ (or http://map.swl.su/) may not accurately indicate the installation location. Keep this in mind during local experiments when assessing the strength of signals by distance and direction. For fans of "CB" and everything that is much higher than 10 MHz: there is almost no reception here. This is due to the peculiarities of the antenna-feeder path. Do not waste time. Try your luck on neighboring receivers. Below 1.6 MHz, satisfactory reception is possible only at night.