Many thanks to SWLing Post contributor, Bob Colegrove, who shares the following guest post:
U. of Twenty Site for Phones and Tablets
by Bob Colegrove
I’m not sure if this is new. It may have been around for a while. Very recently, while accessing the WebSDR site at the University of Twente, it detected that I was on a tablet and offered redirection to an experimental version of their site: http://websdr.ewi.utwente.nl:8901/m.html.
Besides being an interesting site to surf radio stations, I use it regularly as a ‘spotter’ tool to see what’s on shortwave. Admittedly, it is more than 3,900 miles from my receiver, but I like to see how well my antennas are doing.
The experimental version was accessed using the Silk browser on a 7-inch Kindle Fire. It is slimmed down from the main version, and much easier to use with a phone or tablet, particularly the zoom in and out feature.
Something that hasn’t been reported here in SWLing Post are the PhantomSDR web sdr
https://www.rtl-sdr.com/phantomsdr-websdr-software-for-the-rx888-mkii-and-other-sdrs/
and FM-DX webserver
https://fmdx.org/projects/webserver.php
The link above shows the history of this project in the Netherlands university.
It has competition from KiwiSDR from New Zealand. This is where the purchaser of the receiver is put on line. and multiple users can access simultaneously
http://rx.linkfanel.net/ for receiver locations. You can zoom in to select individual receivers. The antenna description tells you what is on the receiver input.
http://kiwisdr.com/ks/using_Kiwi.html. In addition to the demodulation modes of the above receiver, they will all demodulate Digital Radio Mondiale.(DRM) DRM transmission schedule https://www.drm.org/broadcast-schedule/
Yes, this WebSDR link has been around for a while… I first read about it via “The Spectrum Monitor” about 2 years ago… As SWL reception opportunities continue to fade in North America, this easy-to-use online SDR offers oodles of strong -signal shortwave broadcast offerings 24/7, as its antenna is in the heart of shortwave heaven, Central Europe… I use it much more now than my old and venerable crop of SW radios at home.
If you have been skittish/snobbish about using online SDRs up to now, the WebSDR might change your mind. Be sure to thank the staff at University at Twente at the comment address noted in the post above…!
This has been around for as long as I can remember. I use it on the PC as I find it much more convenient than the original site.
The only difference is that you can’t change the BW of any given station.
There is a workaround though : use the original version and for any frequency, save several BW and settings. Then revert to the “M” version and select the memory that corresponds to the wanted BW and then enter the frequency you want to listen to. On a smartphone the initial step may be a little difficult, but you only have to do it once.
This mobile version is not new! It’s been available for several years and I’ve used it often. Simple and very practical, it allows you to benefit from the exceptional capabilities of this web SDR, due in part to its miniwhip antenna: https://www.pa3fwm.nl/projects/miniwhip/
A quick start guide to using an on-line (WebSDR) radio receiver to listen to Amateur Radio is available in English and French in .pdf format :
https://peanutpower.co.uk/websdr