Ham Radio Time Synchronization and Clock Utilities
Find software tools for accurate timekeeping, UTC display, station identification timers, and PC clock synchronization via NTP or GPS.
Accurate timekeeping is essential for amateur radio operators, especially for logging QSOs, participating in contests, and coordinating satellite operation. Many ham radio activities rely on precise UTC synchronization to ensure correct log entries and to align with global operating schedules. Maintaining an accurate station clock helps hams avoid logging errors and ensures compliance with identification rules across different bands and modes.
This category offers various software tools to help operators keep their station clocks synchronized. You will find applications for PC clock synchronization, often using internet time servers or GPS receivers, such as GPS2Time. Other utilities, like HamTimer and NERDAlert, provide identification reminders, crucial for maintaining legal operating practices during long QSOs. There are also advanced ham radio desk clocks and dashboards, like HamClock and OpenHamClock, that display not only accurate time but also propagation data, solar activity, and Maidenhead grid squares.
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Freeware software that synchronize your PC's clock. Dimension 4 monitor your Internet connection and automatically adjust your PC's clock when you're online at an interval you specify. Windows version only. -
GPSTime is a small freeware applet that corrects your PC clock using GPS. GPSTime reads the serial data coming out of your GPS receiver and decodes the $GPRMC messages to determine the precise UTC time. Works on Windows Vista/7/8/10 with PC with serial ports. -
A means of sync-ing your computer clock using a GPS Receiver. GPS2Time is another GPS network time synchronization software application for Window 7 and higher. Freeware. -
Keep track of much more than the time with this Wi-Fi enabled device. HamClock is a desk clock that could show accurate time, geography, time zone, solar activ- ity, sunrise and sunset times, Maiden- head locators, beam heading, -
Announce your callsign at least once every ten minutes. HamTime runs in the corner of the screen and gives you an audible alarm when that announcement is due. -
HourWorld is a program with rich graphics that can show you what time it is in a certain part of the world, and well as demonstrate what is actually looks like over the globe. -
World Map - Time Zones realtime map allow to select and display current time for selected regions -
NERDAlert 2000 is an ID timer, with extras -
Radio Clock listens to radio time signals from your radio and corrects the time on your PC clock -
shows time zones around the world a well as the time at locations of your choice. -
Time-Sync is a freeware software to synchronize the time of your system. Time-Sync is installed as a service, the configuration is very easy for each user and can be done in a few steps. Up to five redundant time servers can be configured. -
This World Clock displays time in two user selectable time zones. Each time zone can be switched between 12h and 24h format. -
N6CTA provides a comprehensive tutorial on manually configuring NTP synchronization for Debian Linux, ensuring accurate system time for FT8 and other amateur radio modes. The guide covers updating the system, installing and enabling NTP, verifying the timezone, and using the iputils-clockdiff tool for precise time comparison. A script is included to check and sync system time, enhancing the performance of synchronous modes like FT8. -
BktTimeSync synchronizes the PC time using an internet time server (NTP server) or a GPS receiver connected to USB, serial port or Bluetooth. Great for use with digital modes like FT8, JT65, JT9, JS8Call and others. For the operation of this program requires an active internet connection or a GPS receiver. This program works on all versions of Windows 32 or 64 bit -
BktTimeSyncPhone synchronizes the PC time using the smartphone GPS connected via Bluetooth. Great for use with digital modes like FT8, JT65, JT9, JS8Call and others, especially when you do not have internet connections. To run this program, you need to install BktTimeSyncServer on your PC and the BktTimeSyncAndroid app on your smartphone. The program works with all versions of Windows 32 or 64 bit and requires Java version 8 or higher. The app requires an Android smartphone version 4.4 or higher. -
Adjust date and time of your Icom transceiver from a Windows PC. Compatible with IC-705, IC-7100, IC-7300, IC-7610, IC-7600, IC-7851 (7850), and, IC-9700 -
JTSync is a simple utility that provides the ability to synchronize your computer clock over a network with world-wide NTP servers. When the Internet connection is not available, JTSync allows you to make time adjustments based on decoded QSOs within the WSJT-X application. -
Ham Radio LCD Clock Utility for Macintosh OS X and Windows by GM4JJJ -
Meinberg NTP software to sync your computer clock. NTP client package with IPv4 IPv6 support for Windows XP and newer. -
NetTime is a simple and free software to sync your computer clock via internet. Very useful tool for FT8 FT4 operating modes. -
OpenHamClock is a modern, open-source dashboard for amateur radio operators, designed as a web-based successor to the original HamClock. Deployable locally on a Raspberry Pi or via the cloud, it centralizes essential DX operations into a single, intuitive interface. At its core is an interactive world map that visualizes real-time DX spots, signal paths, satellite tracking, and POTA activators. The software seamlessly integrates critical tools like WSJT-X, DX Cluster, and PSKReporter for monitoring digital traffic. Additionally, it provides vital environmental data, including real-time space weather indices, solar activity, and personalized HF propagation predictions. With customizable themes and a modular architecture, OpenHamClock offers modern operators comprehensive, at-a-glance situational awareness of global radio conditions -
Time Mapper UHD is a versatile mapping and time visualization program offering multi-satellite viewing with frequency display and unique country-pairs for PskReporter data. It features live feeds from logging programs and can plot ADIF files. Ideal for schools, offices, or amateur radio stations, it provides customizable 4K or HD world clock displays with over 60 map layers, including ham radio zones and natural features. The program supports various time functions and can import logs for detailed analysis. It runs on Windows 10 or 11 and offers a 30-day free trial. -
ToyNTP is a simple freeware time server for Windows that implements the SNTP protocol and uses a GPS receiver, Garmin GPS 18x LVC, as time reference. ToyNTP was designed to be used with Faros in the locations where access to the SNTP servers on the Internet is not available, but it may be used for other purposes as well, in particular, it may be configured to keep the PC clock synchronized to a GPS receiver.