Cabrillo Log Format
The standard contest log format used by major radiosport events. Build valid headers, encode QSO records correctly, and verify compatibility before submission.
Cabrillo
Header
QSO
START-OF-LOG: 3.0
CONTEST: CQ-WW-RTTY
CALLSIGN: K1IR
CATEGORY-OPERATOR: SINGLE-OP
QSO: 14074 RY 2026-10-24 0001 K1IR 599 05 MA N0CALL 599 04 CO
END-OF-LOG:
START-OF-LOG: 3.0
CONTEST: CQ-WW-RTTY
CALLSIGN: K1IR
CATEGORY-OPERATOR: SINGLE-OP
END-OF-LOG:
QSO: 14074 RY 2026-10-24 0001 K1IR 599 05 MA N0CALL 599 04 CO
Used by CQ WW, CQ WPX, and other sponsored contests.
Valid for Submission
Field definitions and examples aligned with active contest processing rules.
Clear Record Structure
Header and QSO data reference pages isolate required and optional data cleanly.
Versioned and Maintained
Track format updates and compatibility notes in the Cabrillo change log.
Frequently Asked Questions
- Which Cabrillo version should I use?
- What breaks log parsing most often?
- How are optional fields handled?
- Where do I report spec issues?
Need field-by-field details? Go directly to the full Cabrillo documentation set.