A WebSDR is a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and tune it simultaneously. SDR technology makes it possible that all listeners tune independently, and thus listen to different signals; this is in contrast to the many classical receivers that are already available via the internet.
More background information is available here. Questions and comments can be sent to PA3FWM, the author of the WebSDR software and maintainer of this site; but please check the frequently asked questions first.
WebSDR servers can register themselves automatically on this site, leading to the below list of currently active WebSDR servers.
Currently there are 89 servers active, with 483 users and 173546 kHz of radio spectrum.
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Antenna
How close can I mount two antennas?
A viewer asks: “I am running three UHF and four VHF radios. They are all on different frequencies. What would be the minimum spacing for the ant... Read more
Wolf River Coil vs End Fed Half Wave: Brunet Island State Park, WI POTA K-1442
You asked for it, here it is: a live A/B test of the Wolf River Coil vs the Chameleon CHA-LEFS End Fed Half Wave antenna. Which will win in this Parks... Read more
Phasing Antennas for Directionality
Jared, N0SPC, is the only ham in his country, and he has a question regarding phasing. He wants to know if he can use a phased array of mobile whips t... Read more
Chameleon CHA-MPAS 2.0 Portable Ham Radio Antenna System
The Chameleon CHA-MPAS 2.0 just might be the best portable Ham Radio antenna that you can get today, due to its versatile configurations and compact s... Read more
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