Helpful Links

Since this website was created to help users of the UTwente WebSDR, we'd like to provide some additional resources which are useful to beginners in the shortwave listening hobby. We have no affiliation with the sites linked below. 🔗 

General Shortwave Information

http://www.shortwaveschedule.com/index.php?page=2  - Quick access to shortwave basics.

http://en.wikipedia.org/wiki/Shortwave_radio - Wikipedia’s informative article on what shortwave radio is and how it works. 

https://en.wikipedia.org/wiki/Shortwave_listening - Wikipedia article about the hobby of shortwave listening

http://www.shortwave.be/ - Broadcast Belgium’s very comprehensive site. Hover your mouse over the colored boxes to reveal more categories/links.

http://www.dxing.com/frequenc.htm - Understanding frequency vs. wavelength.

http://www.dxing.com/modesand.htm - Understanding modes and modulation (SSB, LSB, USB, etc.) 

https://en.wikipedia.org/wiki/Radio_propagation - Understand radio wave propagation.

http://www.short-wave.info/ - Shortwave frequency schedules. A guide to what’s on.

http://www.shortwaveschedule.com/ - Another place to find out who’s on the radio right now.

http://qrg.globaltuners.com/ - Global frequency database.

http://www.klingenfuss.org/utility.htm - Klingenfuss guide to utility radio stations. Super detailed!

http://www1.m2.mediacat.ne.jp/binews/ut/userlist1.txt - Also known as Aoki. Massive plain-text list of shortwave frequencies and programs. 

http://www.reddit.com/r/shortwave/ - Reddit’s continuing thread on Shortwave. Lots of information and a place to ask questions.

http://shortwavearchive.com/ - Shortwave archive. Listen to historic and current recordings.

http://www.swpc.noaa.gov/communities/radio-communications - NOAA's Radio Communications Dashboard. Find out what the ionosphere is like and how it might affect radio communications.

http://www.blitzortung.org/Webpages/index.php?lang=en&page_0=10 - Real time map showing lighting strikes in Western Europe. Helpful to determine if bad weather near University of Twente is affecting signal.  

http://dx.qsl.net/propagation/greyline.html - Grey line map. The "grey line" is a band around the Earth that separates daylight from darkness- it affects radio wave propagation.

Specific to WebSDRs Around the World

http://websdr.org/ - listing of many other online shortwave radios around the world.

http://sdr.hu/map - Locations of kiwiSDR remote receivers, on a zoomable map.

http://sdrspace.com/ - Listen to other online shortwave radios around the world (with location map.)

https://www.sigidwiki.com/wiki/Database - This site will help you identify what you're hearing, through example sounds and photos of what sounds look like in the webSDR waterfall. Extremely comprehensive.   

Numbers Stations

http://priyom.org/ - The web’s best source of information about numbers stations. Includes schedules, recordings, and highly detailed information about all the stations transmitting today.

http://priyom.org/blog/new-priyom-streams-are-ready-for-testing - Link to real-time streams of The Buzzer, the Pip, The Squeaky Wheel, and more

http://www.apul64.dsl.pipex.com/enigma2000/ - The ENIGMA group first created and still maintains the definitive list of numbers stations. Highly informative site.

http://www.numbers-stations.com/ - Another great source of information on numbers stations.

http://www.spynumbers.com/ - database and info 

https://www.hfunderground.com/board/index.php/board,7.0.html - HFUnderground board

https://archive.org/details/ird059 - The Conet Project. Recordings of older (Cold War-era) and more recent numbers stations. Fascinating to listen to.

Links Suggested by UTwente WebSDR Users 
http://www.iarums-r1.org/iarums/radar-2013.pdf - "Radar Systems on Shortwave." Extremely informative PDF.

http://info.yachtcom.co.uk/HF-frequencies/ - List of Marine HF frequencies.

http://www.g0hwc.com/hfbandplan[1].htm - High Frequency band plan.

http://www.dxinfocentre.com/volmet-wx.htm Information for people interested in monitoring VOLMET. https://wiki.radioreference.com/index.php/VOLMET

https://www.youtube.com/user/FirstToken/videos - YouTube channel for a gentleman with years of experience in radio. Many curious and interesting videos. 

http://www.solarham.net/globald.htm - Current space weather (which affects shortwave signal propagation.)

http://cisquet.home.xs4all.nl/NDB.htm - Non-directional beacons.

http://eam.watch/ - Emergency Action Messages log/info.

https://www.afcea.org/content/bringing-communications-back-down-earth - High frequency radios can bridge a beyond-line-of-sight gap during operations in contested environments.