| Abbreviation | Definition |
|---|---|
| GS | Ground State |
| HAAT | Height Above Average Terrain |
| HAM | Amateur Radio Operator |
| HAM | Hardly Any Money |
| HAM | Hertz, Ampere, and Marconi |
| HARC | Huntsville Amateur Radio Club |
| HARP | Hometown Area Recruiting Program |
| HCA | High Current Amplifier |
| HCRA | Hampden County Radio Association |
| HF | Hands Free |
| HFN | High Frequency Noise |
| HG | High Gain |
| HH5PA | WORLD FAMOUS AMATEUR RADIO STATION IN QUITO, ECUADOR. |
| HMS | High-Mast System |
| HNY | Honey |
| HO | Harmonic Oscillator |
| HPD | Half Power Diameter |
| HQRP | Houston QRP Club |
| HR | Hikari Radio |
| HRAC | Harrisburg Radio Amateurs Club |