📡 Maidenhead Locator (QTH Locator)

What is the Maidenhead Locator?

The Maidenhead Locator (also called QTH Locator) is a globally used coordinate system in amateur radio.

It is used to quickly and uniquely specify the location of a radio station—without long GPS coordinates.

📍 Practical example

DL4KER locator:

👉 JN48LS

This means:

  • JN = Central Europe
  • 48 = large grid aquare (approx. 100 km)
  • LS = fine grid (very precise position within the region)

Why is this important in amateur radio?

The locator is used for:

📡 Long-distance radio contacts (DX)
🛰️ Contests and competitions
📶 Radio path and distance calculations
🌍 Worldwide location identification

Structure of the Maidenhead system

The locator consists of multiple levels:

1. Field

2 letters → e.g. JN
Coarse geographic region

2. Square

2 digits → e.g. JN48
Region within ~100 km

3. Subsquare

2 letters → e.g. JN48LS
More precise position (~a few km)

example: DL4ker locator JN48LS

Example: DL4KER locator JN48LS

The locator JN48LS shows the exact radio position within the European grid.

This allows other radio amateurs worldwide to:

  • determine your approximate location
  • calculate distances
  • plan antenna directions

What is it used for?

🏆 Amateur radio contests
📡 DX (long-distance contacts)
📍 Logbook entries
🌍 Radio maps & statistics tools

Conclusion

The Maidenhead Locator is a simple but extremely effective system in amateur radio.