| Bawdsey Radar | A world first |
| Camb-Hams | |
| Chelmsford Amateur Radio Society | |
| Codgers | A monthly breakfast get-together of radio amateurs in East Anglia |
| Colchester Radio Amateurs | |
| Essex CW Club | |
| EssexHam | Supporting Amateur Radio in Essex |
| Fists CW | |
| GQRP Club | |
| Grimeton | 17.2kHz |
| The Harwich Amateur Radio Interest Group | |
| Martlesham Radio Society | |
| OH8X | Radio Arcala located in the Far North at the Arctic Circle under the Aurora Belt, |
| Radio Society of Great Britain | |
| RAYNET | East Suffolk RAYNET communications Support Volunteers |
| Suffolk Aviation Heritage Group | Promoting local aviation history. |
| Suffolk Red | Suffolk RED is open to all who have an interest in Radio & Electronics. |
| South Anglia Repeater Group | |
| UK Microwave Group | |
| UK Radio Astronomy Association | |
| UK Six Metre Group |
| British Astronomical Association | |
| Orwell Astronimical Society (Ipswich) |