DDFM 50 MHz

REF's national 6-metre contest, 24 hours from the second Saturday of June, exchanging department or serial plus a six-character locator.

Rules at concours.r-e-f.orgThe rules are the sponsor's. This page holds the dates and the facts.

When it runs

Second Saturday of June

1400Z Saturday → 1400Z Sunday

Times are UTC, as the sponsor states them.

Next runnings

1400Z Sat 12 Jun → 1400Z Sun 13 Jun · 24h2027
in 254 days
Logs due 1400Z Wed 16 Jun
1400Z Sat 10 Jun → 1400Z Sun 11 Jun · 24h2028
in 618 days
Logs due 1400Z Wed 14 Jun
1400Z Sat 9 Jun → 1400Z Sun 10 Jun · 24h2029
in 982 days
Logs due 1400Z Wed 13 Jun
1400Z Sat 8 Jun → 1400Z Sun 9 Jun · 24h2030
in 1346 days
Logs due 1400Z Wed 12 Jun

Operating

Modes: SSB / CW / FM
Bands: 6m
Exchange: French metropolitan stations send RS(T) + department + a six-character locator (e.g. 59 75 JN18DU); all other stations send RS(T) + serial number + locator (e.g. 59 001 KN04FG).
Logs: IARU REG1TEST · due 3 days after the end · concours.r-e-f.org
Who can enter: Anyone, anywhere.
Section 6 establishes 'Un classement F (toutes categories confondues). Un classement etranger.' -- a French ranking and a foreign ranking -- and section 4 gives foreign stations their own exchange format.

Where this comes from

Checked against the sponsor: Yes. The rule on this page was read off REF's own published rules. Link last confirmed 2026-08-18.
What the source says: concours.r-e-f.org, 'DDFM 50 MHz -- REGLEMENT', 2: 'DATE ET HORAIRE -- Le concours debute le deuxieme samedi de juin 1400 UTC et s'acheve le dimanche a 1400 UTC.' 3: 'FREQUENCES ET MODES -- SSB, CW, FM.' 4: 'ECHANGES -- Les stations francaises de metropole passent : RS(T) + Departement + QRA locator sur 6 caracteres ... Toutes les autres stations passent : RS(T) + numero de serie + QRA locator sur 6 caracteres'. 7: 'COMPTES RENDUS -- Informatise : compte-rendu au format IARU « reg1test ».' 8: 'ENVOI -- Au plus tard le premier mercredi qui suit le concours'. REF published 13-14 June 2026 and 14-15 June 2025; the second-Saturday rule reproduces both.
Recorded caveats: FM is recorded as a submode because the catalog's mode vocabulary has no FM token; REF lists 'SSB, CW, FM' as the permitted modes and all three are worked on the same 6 m band. log_deadline_days is derived from 'le premier mercredi qui suit le concours': the contest ends 1400 UTC Sunday and the following Wednesday is exactly three days later, in every year. CONTRADICTION RECORDED RATHER THAN RECONCILED: REF's 2025 contest calendar listed this contest with a 15:00 start, while this rules PDF and REF's 2026 calendar both say 14:00. The rules are encoded. Separately, REF's 2026 calendar prints the 'Coupe du REF - OM complet' row with its end before its start (27/06/2026 06:00 to 07/06/2026 14:00); no record here depends on it.

Something wrong? How to report it — a link to the sponsor's own page is all it takes.

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