Tesla Memorial HF CW Contest

Serbia's overnight CW contest on 80m and 40m, scored purely by distance -- no multipliers, no penalties, just twelve hours from 1800 UTC.

Rules at radiosport.yu1srs.org.rsThe rules are the sponsor's. This page holds the dates and the facts.

When it runs

Second full weekend of March

1800Z Saturday → 0559Z Sunday

Times are UTC, as the sponsor states them.

Next runnings

1800Z Sat 13 Mar → 0559Z Sun 14 Mar · 11h 59m2027
in 163 days
1800Z Sat 11 Mar → 0559Z Sun 12 Mar · 11h 59m2028
in 527 days
1800Z Sat 10 Mar → 0559Z Sun 11 Mar · 11h 59m2029
in 891 days
1800Z Sat 9 Mar → 0559Z Sun 10 Mar · 11h 59m2030
in 1255 days

Operating

Modes: CW
Bands: 80m40m
Exchange: RST, a serial number from 001 and a four-character locator -- 599 023 KN03.
Logs: Cabrillo · radiosport.yu1srs.org.rs
Who can enter: Anyone, anywhere.
The rules set no entry restriction and score every contact by distance; stations using a prefix not assigned by the ITU are placed in check logs.

Where this comes from

Checked against the sponsor: Yes. The rule on this page was read off SRS's own published rules. Link last confirmed 2026-08-19.
What the source says: radiosport.yu1srs.org.rs/HFTeslaMemorial, the Savez radio-amatera Srbije's own rules page. 'Contest rules 2026 / March 14/15, 2026 / Starts: 18:00 UTC Saturday March 14 / Ends: 05:59 UTC Sunday March 15'. The recurrence is SRS's own: the contest 'will be held every year, every second weekend in March' / 'odrzavace se svake godine drugog vikenda u martu'. Bands: '3.5 MHz (80m) and 7MHz (40m) bands may be used.' Mode: CW. Exchange: 'QSO NR: Starting from 001 and increases by 1 for each subsequent QSO regardless of the band' plus a four-character locator -- 'Exchange example: 599 023 KN03'. Points run on a distance table from 10 to 45; there are no multipliers and no penalties. 'XII. Deadline for sending a log: 19.03.2026. until 23.59 UTC.' Logs via the web service or tesla(at)yu1srs.org.rs; paper logs are not accepted.
Recorded caveats: 'Second weekend in March' is encoded as the second FULL weekend, and SRS's own published dates settle it: 2019 09/10, 2020 14/15, 2021 13/14, 2022 12/13, 2023 11/12, 2024 09/10, 2025 08/09 and 2026 14/15 -- eight years, all reproduced. 2020 is the year that discriminates: 1 March 2020 was a Sunday, so counting weekends by their Sunday gives 7/8, but SRS published 14/15. The log deadline is a stated instant (19 March 2026, 23:59 UTC) rather than an interval from the contest end, so it is recorded here. BLOCKERS: yudx.org, the host in the registry, no longer resolves; SRS's own domestic schedule and rules pages ('Raspored takmicenja i pravila', 'Takmicenja') render only a JavaScript placeholder, and stari.yu1srs.org.rs returns HTTP 500 -- so KT Prvenstvo Srbije and KT Kup SRS could not be read and are not encoded.

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

Take it with you

Add to Google Calendar Subscribe (iCal)This record as JSON

Add to Google Calendar puts the next running in as a single event. It is one event, not a subscription — come back for the one after it, or use the feed below.

Subscribe (iCal) carries this contest's runnings for the next twelve months as UTC instants and keeps them current. Apple Calendar, Outlook and Thunderbird take this address directly. Its identifiers are stable across deploys, so re-subscribing does not duplicate anything: https://contestclock.com/api/ics?id=srs-tesla-memorial-hf-cw

Google has no working one-click subscribe. Paste that address into Settings → Add calendar → From URL. Google then polls it on its own schedule, often 8–24 hours, and that cannot be forced — so use Add to Google Calendar above if you want the next running in your calendar now.