Skip to main content

Log4OM modern user interface runs on PC, Windows tablet and can be started also from an USB key with limited resources

Fully customizable

Over a hundred options makes Log4OM your best friend, easily following all your needs.


Integrated with LoTW, eQSL,, HamQTH, QRZCQ, Clublog, HRDLog, SOTA, IOTA it's your unique interface to external world


Your log is Always available and automatically uploaded to external services and exported in ADIF everytime you use the software

Log4OM 1.33.1 HOTFIX released

This version fixes the issue that happened with some “old” mySQL databases. New MySQL driver will require SSL Mode set and defaults to PREFERRED instead of NONE.

This means that if SSL is available will be used.

The issue is with some MySQL that are not supporting the Preferred mode, and stays with None. We downgraded security (applied by default by new drivers) forcing to None.

Release note version 1.33.0

Release notes Version 1.33.0


– Fixed massive QSO update country functionalities

– Added a new backup function (always active with main backup – not on secondary) to keep the last backup of each month in /backup/historic folder (or user defined folder)

– Log optimized for multi thread and parallel executions introduced in 1.32.0

– Wait and result message added in massive Clublog upload

– Italian version. Restored misplaced PWR field

– Added flags in CAT settings to manage REVERSE in some rigs (USB is REVERSE not NORMAL on some rigs, including ICOM and ELECRAFT). Side band will be reversed on outbound requests

– Separated VFO A and VFO B transverter offset in settings screen

– Separated VFO A and VFO B transverter offset in SATELLITE screen (F6)

– Added ability to disable transverter offset in realtime on each VFO in SATELLITE screen (F6)

– Optimizations on award management load from XML (skipping dupes)

– Fixed configuration to comply with unexpected version namespace change in Clublog files

Release notes Version 1.32.0


– Code upgraded to .NET Framework 4.6 – End of Windows XP support

– New feature: multiple/massive QSO upload to ClubLog (from QSL Management)

– Added more control codes to LOTW upload management.

– Added eQSL qsl graphic download speed throttling (10/sec delay between graphic download). NOTE: This will slow down EQSL images download, following their explicit requirements. It’s not a Log4OM issue.

– Added german manual on installer and help menu

– QRZ, QRZCQ, HAMQTH temporary session key cleared on config update

– Restored normal operations with ClubLog exception files. Moved CLUBLOG namespace into settings xml file and updated namespace following Clublog data format change.

– Some other enhancements and upgrades on libraries

Log4OM now handles Special Contest Calls as new feature introduced with release 1.31.0

Log4Om is committed to resolving call signs with 100% accuracy. Thanks to Chuck K7PT work on callsign database have, starting from today, implemented a new feature in this quest. Log4OM now resolves contest calls that can not be resolved normally using a new file Special Contest Calls. Example is the TO series which can be many DXCC entities.
There is nothing the user has to do as it is handled automatically by Log4OM starting from version 1.31.0 at first SCL update