03 | 12 | 2023

UBA PSK63 Prefix Contest

1. Date

10 january 2015, 12:00 UTC until 11 january 2015, 12:00 UTC. 
(every year the 2nd weekend of january)


2. Participants

Participation is open to all radio amateurs world wide in possession of a valid licence and to all SWL's.

3. Mode

BPSK63 only

4. Bands

10, 15, 20, 40 and 80 meter, in the segments recommended by the IARU for this mode.

5. Power

Maximum power  output 50 W (5 W for QRP), in order not to cause interference or splatter to other participants.

6. Categories

  • Single Operator All Band - SOAB
  • Single Operator Single Band (SO10, etc.)
  • Single Operator All Band QRP - SOQRPAB
  • Single Operator Single Band QRP (SOQRP10, etc.)
  • Multi Operator, only All Band - MO (max output 50W)
  • SWL all bands.(see point 17)


  • The use of DX clusters is permitted in all categories.  Self spotting, asking others to spot you, undercover spots or any spots from multi operator team members are not allowed.
  • In the Single Operator categories, only one transmitted signal on the air is permitted at any time.
  • In the Single Operator categories , QSO´s may be made on other bands but the operator can only opt for an award on one band.  Make sure that you marked the correct category in your log.  Do not remove the QSO's on other bands.
  • In the Multi operator categories, only one transmitted signal per band at any one time is permitted. All transmitters, receivers, and antennas must be within a radius of 500m.
  • Only one callsign is allowed to be used for the duration of the contest.

8. General call


9. Valid Contacts

Stations may be contacted anywhere in the world. Each station can be contacted only once per band.

10. Exchange

RSQ followed by a serial number starting with 1001.
You need to use a 4 character QSO number.  If not complying to this rule, your log will be treated as a checklog.

11. Points

Every QSOs one (1) point.

12. Multiplier

Every prefix according to the WPX rules once on each band.

13. Final score

The sum of the points obtained, multiplied by the sum of all the multipliers obtained on all bands.

14. Logs

15. Log correction issues

  • For a QSO to be valid the callsign must appear in at least 2 other logs if no log from that station is received.
  • Not in log QSO's will be removed from the log.
  • Busted or bad calls will be removed from the log.
  • QSO's with and error in the received QSO number will be removed from the log.

16. Prizes

Digital certificates for the winner in every category and for the winner in each DXCC country providing he has 40 valid QSO's.  Additional certificates can be granted if the returns justifies it. (a significant number of participants from that country or a very small difference in score)  The certificates will reflect the participants place WW, in his continent and in his DXCC country.

17. SWL rules

SWL's have to report Date, UTC, band, Callsign of the station copied, QSO number sent by the station copied and the callsign of the station being worked.  A station will count only once for points on each band.  A station being worked may only be used 10 times on each band. SWL's can use the program SWL_DQR_log from SP7DQR. http://sp7dqr.pl/en/contests.php

18. Declaration

By submitting your log in the UBA PSK 63 Prefix Contest you agree that:

  • you have read and understood the rules of the contest and agree to be bound by them,
  • you have operated according to all rules and regulations of your country that pertain to amateur radio,
  • all actions and decisions of the Contest Committee are official and final.


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