Understanding Ham Radio Log File Standards

Find specifications and examples for common amateur radio log formats like ADIF, Cabrillo, and EDI, essential for contest submissions and data exchange.

David
Reviewed by • Senior RF Engineer & Technical Editor March 2026

Amateur radio operators rely on standardized log formats to record their QSOs and exchange data between different logging software, contest programs, and online services. These formats ensure that station information, band, mode, and other contact details are consistently captured and easily transferable. Proper logging is essential for contest submissions, awards tracking, and maintaining accurate station records.

Hams frequently use formats like Cabrillo for submitting contest logs, which is widely adopted for major events. For general QSO data exchange between various logging applications, the ADIF (Amateur Data Interchange Format) standard is crucial, allowing seamless transfer of logs regardless of the operating system or specific software used. Developers often discuss implementation details for these standards to ensure compatibility across the amateur radio software ecosystem.

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