A user group for the users of the RFzero board can be found at the RFzero user group. Please feel free to join the group.

When you want to join you must state your FIRST NAME and CALL, in Display Name found under Account | Identity | Account profile/Group profile, so you can be identified. If you don’t do this your membership will be pending for one week after which it will be deleted.

If you have an online repository with RFzero code, webpage or pictures showing your use of your RFzero please feel free to contact us.


From time to time OZ0RF operates a WSPR transmitter from JO65FS in the Greater Copenhagen area into a 1:9 UNUN connected to a 16,2 m longwire antenna. Sometimes the RFzero output is boosted to 27 dBm/500 mW. The actual location is nothing to brag about and a better locations will be investigated when time permits.

The RFzero as OZ0RF during the development of the WSPR transmitter example program. The picture shows the RFzero, LCD and low pass filter bank.

You can see the latest spots of OZ0RF on


Jemtlands Radioamatörer, SK3JR, has since 4 January 2019 operated the SK3SIX beacon on 50,468 MHz transmitting 15 W using PI4 + CW + carrier. The beacon uses a RFzero and was built by Mikael, SA3AZK.

The RFzero and PA for SK3SIX during testing. Picture courtesy Mikael, SA3AZK.