DX прозорци на късовълновите обхвати

HF Band DX Windows: Operating Long-Distance Stations Without Causing QRM

Ever since my early days in the hobby, I have been a devoted fan of DX operating. Perhaps it stems from one of my earliest contacts in 1978 — operating QRP (using less than 1 watt from a modified „Signal“ model remote control transmitter) from Veliko Tarnovo, Bulgaria, to New Caledonia. That single contact ignited a lifelong passion for amateur radio.

To preserve operational efficiency and assist stations in pulling out weak signals from distant continents, the International Amateur Radio Union (IARU) designates specific **DX windows**.

1. Official IARU DX Windows

IARU Region 1 (Europe, Africa, Middle East, and Northern Asia)

IARU Region 2 (North and South America)

2. Traditional and Unofficial DX Segments

Alongside official IARU spectrum allocations, practical experience over the decades has established several widely accepted unofficial DX windows:

Conclusion: Refrain from local ragchewing within designated DX windows. These frequency slices are reserved for listening for rare DX stations — conducting routine local chats in these areas creates unnecessary QRM for operators attempting weak-signal DX contacts.