01
Cluster
A simple yet powerful Telnet terminal for fast DX Cluster connections. Highlight up to four callsigns to help catch DXpeditions and rare stations still missing from your DXCC.
Created by IK6QRH — Roberto Borrelli
qrh-OS
Your Ham Radio World,
Inside Windows.
An application that works like an operating system inside your Windows 10 or 11 system. It does not change your system settings: it adds a virtual desktop with utilities for amateur radio operators and an integrated CAT radio system.
Download qrh-OS30-day free trial · no limits↓No credit card required · Nothing to pay
A complete radio desktop
Why an Operating System?
Because qrh-OS brings radio utilities, live maps, web pages, audio and video players, and DX tools together in one focused environment. Everything runs in a single window inspired by classic Windows systems—directly on your Windows 10 or Windows 11 PC.
DX toolsLive mapsCAT controlAudio & videoWeb utilities
Explore the desktop
Everything within reach
Built for the curious operator, from first signal to the rarest contact.
12
Timezone
Discover the local time anywhere in the world with a single click.
13
Visual DX
A beautiful interactive globe created by IK6QRH, showing DX stations, their locations and operating frequencies. Tune your radio with one click.
03
CAT Configuration
Connect your transceiver and tune directly from Cluster, POTA, SOTA, WWFF and Visual DX.
02
APRS Live
Follow APRS stations in real time on interactive maps.
04
Contest Calendar
Worldwide Amateur Radio contests for the current and following month.
05
Flora & Fauna
Discover live Flora & Fauna activations and tune your CAT-connected radio in real time.
06
HF Low Bands Beacons
Explore HF beacons around the world on an interactive globe.
07
HF Propagation
Check HF propagation conditions in real time.
08
MeshCom Map
See MeshCom stations operating in your area.
09
POTA Tunable
Official Parks on the Air activations and spots. Select a station and tune your CAT-connected radio.
10
Reverse Beacons
Enter your callsign in the Spotted field and discover where your transmissions—including digital modes—are being heard.
11
SOTA Tunable
Follow real-time Summits on the Air spots and quickly tune active stations.
14
WebSDR
Explore KiwiSDR and WebSDR receivers worldwide: where your antenna cannot reach, a remote SDR antenna can.
15
Weather
Real-time weather and rain maps for Europe and the world.
16
World TV
A wonderful integrated player with more than 10,000 IPTV channels. Must see—and free.
17
WSPR Live
Explore the WSPR network and discover radio propagation around the world.
Ready for lift-off
Install in a few moments
- Download the qrh-OS ZIP file.
- Create a folder anywhere on your PC, for example
C:\qrh-OS. - Unzip all files into that folder, then run qrh-OS.
Compatible with Windows 10 & Windows 11.
One window. One radio desktop. A whole world of Amateur Radio.
Ready to explore?
Try every feature for 30 days, with no limits.
Download qrh-OS freeNo credit card · No payment↓