HF Clusters
1.8 Mhz 3.5 Mhz 7 Mhz
10 Mhz 14 Mhz 18 Mhz
21 Mhz 24 Mhz 28 Mhz
VHF/UHF Clusters
50 Mhz 144 Mhz 432 Mhz