- Original document for the popular CJU satellite antenna, the Canary Jail Umbrella by EA4CYQ. This is a handheld antenna that permit UHF VHF operations suitable for satellite contacts. PDF in spanish.
- DX CB Radio is an 11 meter band DX-info page with Country Divisions, DX27, Q-Codes and more. A dedicated website and blog devoted to CB Radio DX hosted by 233YO105. Main topics are CB Radio modifications, Antennas, Propagation conditions, 11 meter band cluster, Citizen Band Radio Guide, 11m DX Groups