Medzinárodné preteky OK-OM DX CW Contest 2025, organizované Českým radioklubom a By the Slovak Amateur Radio Association, sa uskutočnia 8.–9. novembra 2025. Sú určené pre všetkých rádioamatérov vo viacerých kategóriách – jedno- aj viacpásmových, QRP, LP, HP, multi-op a SWL. Súťaží sa na pásmach od 1,8 do 28 MHz, okrem WARC. Používa sa CW prevádzka. Elektronické denníky vo formáte Cabrillo musia byť zaslané cez web okomdx.crk.cz do 7 dní po pretekoch. Hodnotenie vychádza z počtu bodov za spojenia a násobičov (okresy OK/OM, krajiny DXCC/WAE). Víťazi hlavných kategórií získajú plakety, ostatní PDF diplomy. Spojenia s ruskými a bieloruskými stanicami sa nepočítajú. Všetky rozhodnutia vyhodnocovateľa sú konečné.
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1. Organizer
The Czech Radioclub (ČRK) in cooperation with the Slovak Amateur Radio Union (SZR) announces international competitions „OK-OM DX CW Contest 2025“.
2. Competition date
Preteky sa konajú každý druhý celý víkend v novembri, teda od 12:00 UTC on November 8 to 11:59 UTC on November 9, 2025.
3. Categories
- SOAB - single operator, all bands, power up to 1500 W
- SOAB - single operator, all bands, power up to 100 W
- SOAB QRP - single operator, all bands, power up to 5 W
- SOSB - single operator, one band (160, 80, 40, 20, 15, 10 m); categories HP, LP, QRP
- MOST - multiple operators, one transmitter
- MO2T - multiple operators, two transmitters
- SWL - listeners, all bands
All bands from 1.8 to 28 MHz, okrem WARC pásiem.
3.1
The participant can participate in multi-band and multiple single-band categories simultaneously. Can register up to siedmich kategórií – všetky pásma, 160 m, 80 m, 40 m, 20 m, 15 m, 10 m – a získať až šesť diplomov.
3.2
Participants who compete only on one band, but during the competition make connections on other bands, must also send a control log from these other bands.
3.3
Participants are evaluated in three groups: svet, Európa, OK+OM.
4. General rules
4.1
Transmitters and receivers must be located in a circle with a diameter of at most 500 metrov a všetky antény musia byť prepojené s technikou napájacími káblami.
4.2
Free use is allowed in all categories packetu a web-clusterov.
4.3
The use of an IP network for remote reception (including internet SDR receivers) is considered nešportové správanie a je dôvodom na diskvalifikáciu.
4.4
Self-spotting (announcing one's own call sign in the cluster) is prohibited. Arranging connections via phone, internet, or other similar means before and during the competition is zakázané.
It is not allowed to use other marks to maintain the working frequency in another band, negotiating schedules or tuning for the purpose of gaining multipliers.
It is not allowed to use other brands to maintain the working frequency on another band, to negotiate skeds or to retune to obtain multipliers.
One operator may freely tune between bands, but may transmit only one signal at any time.
One operator may freely tune between bands, but may transmit len jeden signál v ktoromkoľvek okamihu.
A station in the 'one operator' category is operated exclusively by one person, who handles all activities - station operation, logging contacts, and working with the cluster.
A station in the "one operator" category is served výhradne jednou osobou, ktorá zabezpečuje všetky činnosti – obsluhu stanice, zapisovanie spojení aj prácu s clustrom.
MOST stations (multi-operator, one transmitter) are limited by the 10-minute rule. Time is counted from the first contact on the band. Only one signal may be transmitted at any time. An exception is a signal on another band, if it is to establish a connection with a new multiplier. This second band is also subject to the 10-minute rule and calling a CQ is not allowed on it.
MOST stations (multi operator, one transmitter) are limited 10-minútovým pravidlom. Čas sa počíta od prvého spojenia na danom pásme. V ľubovoľnom okamihu môže byť vysielaný len jeden signál.
The exception is a signal on another band, if it is about establishing a connection with novým násobičom. Aj toto druhé pásmo podlieha 10-minútovému pravidlu a nie je dovolené na ňom volať výzvu.
If connections are made in violation of this provision, they may be noted in the journal, but nebudú započítané ani penalizované – použijú sa len ako kontrolné a budú uznané pre protistanicu.
MO2T (Multi-op, two transmitters): maximum two signals on two different bands simultaneously. Each transmitter may tune between bands up to 8 times per hour (00-59 min). Example: tuning from 40m to 80m and back counts as two tunings. Both stations may make contacts as needed.
MO2T (Multi-op, dva vysielače): maximálne two signals on two different bands simultaneously. Každý vysielač sa môže prelaďovať medzi pásmami najviac 8× za hodinu (00–59 min).
Example: retuning from 40m to 80m and back counts as two retunings.
Both stations can establish connections as needed.
Contest code
5.1
Stanice outside OK-OM: report + poradové číslo spojenia, začínajúce 001.
- MOST môžu použiť spoločné číslovanie or separate for each band.
- MO2Ts can be numbered separately for each band or for each station separately. Connections must be clearly marked in the diary.
5.2
Stanice OK a OM: report + district sign (three letters).
Points for connection
For OK and OM stations:
- connection with own country - 2 body
- connection with another country on the same continent - 3 body
- connection with another continent - 5 bodov
Note: OK and OM are separate DXCC entities, connection OK-OM counts for 3 points.
For stations outside OK-OM:
- connection with OK or OM - 10 bodov
- connection with own country - 1 bod
- connection with another country on the same continent - 3 body
- connection with another continent - 5 bodov
6.3
Stanice /MM (mobilné na mori) sa do not count as multiplier, ale vždy dávajú 5 bodov.
6.4
SWL stations (listeners) must record one or both stations in the connection; otherwise, the same rules apply to them.
Duplicates
7.1
A duplicate is a repeated connection with the same station on the same band.
If the first connection is valid, further connections are for 0 bodov.
If the first connection was invalid, the next one is counted.
7.2
Duplicates are listed in the log, nie je potrebné ich označovať.
Multipliers
Používajú sa two types of multipliers:
- každý okres OK a OM separately on each band,
- každá DXCC alebo WAE krajina separately on each band.
Total score
Total score = (sum of points for connections) × (sum of all multipliers: districts OK/OM + countries DXCC/WAE).
The calculation of the total score is done by the organizer after the end of computer processing.
Conditions for accepting logs
- Denníky sa prijímajú only electronically in Cabrillo format.
- Odosielajú sa exclusively via the web interface na adrese http://okomdx.crk.cz.
- All times must be in UTC.
- All sent and received data must be recorded in the log.
- The category, email, and postal address of the participant must be included in the header of the Cabrillo log.
- If the log cannot be sent via the web interface, it can be sent by email to the address: okomdx@crk.cz.
11. Logs
11.1 Logs must be delivered do 7 dní po skončení pretekov, t. j. do 16. novembra 2025, 23:59 UTC.
11.2 Successful delivery of the log is immediately confirmed on the website and a confirmation email is sent to the address provided in the Cabrillo file header.
11.3 SWL logs are sent by email to the address okomdxc@crk.cz v elektronickej podobe.
Recommended software: SWL DQR Log od autora SP7DQR – http://SP7DQR.pl/en/contests.php.
12. Diplomas and plaques
12.1 Plaques will be awarded to the winners of the main categories who also meet the specified criteria.
One station can receive in a given year maximálne jednu plaketu, a to v kategórii, v ktorej dosiahla najviac bodov.
12.2 Všetci účastníci si môžu download an electronic diploma in PDF format.
Diplomas will be available for all locations and categories; papierové diplomy sa nerozosielajú.
12.3 Criteria for awarding plaques:
| Category | Condition |
|---|---|
| M-S | min. 1000 valid connections |
| M-2 | min. 1500 valid connections |
| SO-ALL HP | min. 500 valid connections + at least 7 participants in the category |
| SO-ALL LP | min. 400 valid connections + at least 7 participants |
| SO-ALL QRP | min. 200 valid connections + at least 3 participants |
| SO-SB HP | min. 200 valid connections + at least 7 participants |
| SO-SB LP | min. 100 valid connections + at least 7 participants |
| SO-SB QRP | min. 50 valid connections + at least 3 participants |
13. Summary
13.1 Each participant who submits a log will have access to the following on the website:
- UBN report,
- results,
- confirmations of connections with OK and OM districts.
13.2 Additional information:
- e-mail: okomdxcontest@gmail.com
- e-mail: okomdx@crk.cz
13.3 Decision of the contest evaluator OK-OM DX CW je konečné.
14. Statement of the Czech Radioclub on the ongoing war in Ukraine
Až do odvolania logs will not be accepted staníc z Ruskej federácie a Bieloruska na vyhodnotenie.
Connections with these stations budú anulované.
Programs supporting OK-OM DX Contest
Programs that directly support OK/OM DX Contest are listed on the official website http://okomdx.crk.cz.
Districts and district codes
To find out which district a specific municipality belongs to, you can use a server such as Ministerstva pre miestny rozvoj ČR.
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OK/OL DistrictsPrague | OM DistrictsBratislava, prefix OM1 | |