K0MLD Software Downloads

Support and Use Notice

Suggestions for additional features and enhancements are welcome. However, support for these program products is limited to the documentation supplied with each program.

These program products are provided free of charge and “as is,” without warranties of any kind, either express or implied. Use is entirely at the user's own risk. To the fullest extent permitted by law, the author accepts no responsibility or liability for any loss, damage, data loss, system interruption, or other consequence arising from their installation or use.

DXCompass

Version 2.0 • Released August 15, 2026 • Windows 10/11 • .NET Framework 4.0 or later

DXCompass places the geographic and operating information needed for DX work into one clear display. Select a DXCC entity, resolve a callsign through optional QRZ XML lookup, or supply a Maidenhead grid to obtain an immediate heading, distance, time, and map presentation.

Principal capabilities

Calculates true short-path and long-path beam headings.
Reports great-circle distance in miles and kilometers.
Displays the destination's DXCC entity, primary prefix, continent, CQ zone, ITU zone, coordinates, UTC offset, and resolved grid.
Shows home local time, UTC, and estimated DX local time and date.
Plots the path on a location-specific azimuthal map with zoom and automatic map fitting.
Displays a live UTC-based grayline overlay with distinct daylight, civil-twilight, and nighttime regions.
Projects the geographic point where the Sun is directly overhead and automatically adjusts destination-label contrast for daylight and darkness.
Synchronizes the Grayline control between the main map and the larger MapZoom window while retaining the operator's preference.
Provides a guided workflow for creating and registering custom station-centered azimuthal maps.
Copies a formatted heading and distance summary to the Windows clipboard.
Includes AD1C country data and a working K0MLD demonstration configuration and map profile.

Download DXCompass View User's Guide (PDF)

Download verification: 3,199,007 bytes • SHA-256 476afdcc3d928c0019060375c906e768f9b2d3712f46761a631e995be250da32

Windows notice: This software is distributed free of charge and is not commercially code-signed. Windows may display an “Unknown publisher” warning.

K0MLD History Viewer for WSJT-X

Version 1.0 • Released August 14, 2026 • Windows 10/11 • 32-bit application • .NET Framework 4.0 Client Profile or later

K0MLD History Viewer for WSJT-X provides a practical way to locate previously recorded activity involving another station, even when WSJT-X history has been divided among conventional, yearly, or monthly files.

Principal capabilities

Scans the selected WSJT-X history directory for ALL.TXT, YYYY-ALL.TXT, and YYYY-MM-ALL.TXT source files.
Reads every applicable source, removes duplicate records by comparing the complete original line, and sorts unique records chronologically.
Builds a consolidated ALL_HISTORY.TXT at startup, after a directory change, and before every search.
Uses ALL_HISTORY.NEW for atomic replacement so a failed or cancelled rebuild does not destroy the previous completed master.
Searches for records containing both the requested callsign and the station owner's callsign.
Optionally restricts results to a selected UTC QSO date.
Color-codes received, transmitted, and other matching history records for easier review.
Reports files examined, source records read, duplicates removed, unique records written, available date range, and search matches.
Operates locally and never modifies the original WSJT-X history files.

Download WSJT-X History Viewer View User's Guide (PDF)

Download verification: 3,284,690 bytes • SHA-256 70e77510ab238df4ef5146a159a29e2a9fcfb552b071f0b25dfb6bb8983957f6

WSJT-X acknowledgment: WSJT-X is copyrighted software developed by the WSJT Development Group and distributed under the GNU General Public License. K0MLD History Viewer for WSJT-X is an independently developed utility and is not affiliated with or endorsed by the WSJT Development Group.

Windows notice: This software is distributed free of charge and is not commercially code-signed. Windows may display an “Unknown publisher” warning.

Privacy and Internet Use

These K0MLD program products contain no advertising or telemetry and do not collect or transmit personal information to K0MLD.

K0MLD History Viewer for WSJT-X operates on history and configuration files stored on the user's computer and does not require an internet connection.

DXCompass may connect to or open third-party internet services for optional QRZ callsign lookup and map-generation functions. Information supplied to those services is exchanged directly with the applicable provider and is subject to that provider's terms and privacy policy.