The GMDX Summer VHF Challenge 2025:  6m & 4m CW, Voice and Digital Modes The GMDX Summer VHF Challenge will take place beginning 00:00 on Monday 12th May until 2359 on Sunday 6th July. All GMDX members worldwide are welcome to enter. This is a single event using CW, Voice or Digital Modes on both 4m … Continue reading The GMDX Summer VHF Challenge 2025