About this site

The objective of this website is to provide information about the 472 kHz (or 630 m) ham band, for newcomers as well as for advanced users.

Although 472 kHz is a "young" band (available since 2012) there is already plenty of information available, but it is scattered all over the web. 
Here you will find introductions to relevant subjects and references to other sites for more detailed information, rather than an encyclopaedia of all information available on the web.

In addition there are some tools that might be useful:

• A "Who is who" that lists hams that are active on 630 m.
• A "Who is active now" that lists stations that are active on 630 m right now.
• A "First list" showing al (claimed) first ever two way QSO's between DXCC entities.
• A "Distance records list".
• A "Information board" where registerd users can share information about their activities on 630 m.
• A "DX-cluster" monitor, showing the 50 most recent 630 m spots of MY DX SUMMIT.
• A "WSPR DX map", showing all recent (last hour) WSPRnet spots exceeding a certain distance (selectable 1000-7500 km).
• A "Antenna simulator" for small vertical monopole antennas (with and without topload).
• A "Loading coil calculator".

In order to be listed in the "Who is who" or "Who is active now" and use the "Information board" you need to be a registered user and log in on this site. 

If you feel that something is missing here or that some of the information is incomplete or wrong, please contact .

Enjoy this site,

73, Rik  ON7YD - OR7T