WebSDR
This WebSDR (software defined radio) tunes and listens to radio frequencies 0.5-1300 MHz with most Web browsers on Windows, Linux, Android and iOS devices. No client software is necessary.
The receiver is an SDRplay RSP2 running the freeware OpenWebRX+ software on a Raspberry Pi 4 single board computer.
Modes: FM, WFM, AM, LSB, USB, CW, with built-in demodulators for FreeDV, PSK31, FT8, JT65, WSPR, Packet and more.
Location: Amateur Radio Station KP4MD in Citrus Heights, California, near Sacramento.
Antennas: a 40m Loop Skywire for 0.5-54 MHz; and amplified rooftop VHF-UHF bowties for 88-1300 MHz.
Click here to tune in and listen on the Citrus Heights OpenWebRX+
User connection time is limited to 60 minutes.
As the SDRplay RSP2 displays up to 10 MHz of RF spectrum at one time, the WebSDR offers selectable band profiles ordered by increasing frequency. Click on the down arrow in the receiver panel to select one of 15 amateur radio band segments from 80m through 33cm or general coverage segments covering MF, HF, VHF and UHF from 500 kHz through 1300 MHz.
WebSDR Etiquette
OpenWebRX can accommodate several listeners at a time, but the SDRplay receiver can only tune one band at a time. If the status box in the lower left corner shows "Clients [1]" you alone are listening. If two or more clients are listening you are welcome to tune and listen within that band, but you should not change the band as that will interrupt the others' reception.
SDRplay RSP2 Receiver
Raspberry Pi 4 Single Board Computer
The receiver employs a Distill:AM band reject filter and a Flamingo FM band reject filter to avoid front-end overload from strong nearby broadcast stations. Therefore, the receiver sensitivity is decreased in parts of the AM and FM broadcast bands.
Distill:AM filter attenuation on AM broadcast band
Flamingo FM filter attenuation on FM broadcast band
The Radio Frequency Spectrum. This WebSDR receives from 500 kHz through 1300 MHz.
Watch this OpenWebRX demonstration video