BPSK31 모드로 교신을 하다보면 러시아를 비롯한 유럽 HAM들은
거의 EPC(유럽 PSK 클럽) 회원번호를 알려준 것을 느꼈을 것이다.
나도 어떤 EPC member가 추천을 해 와 EPC 회원에 가입을 했는데....
"EU PSK DX CONTEST"에 대한 공고에 교신 Mode를 오로지 "BPSK63"으로
한정이 되어있어서 그러는데
"BPSK31"과 "BPSK63"의 차이점을 알고 계시는 분 있으면 명쾌한 설명 좀 부탁드립니다.

The European PSK Club has the honour to invite radio amateurs from all over the world to participate in the EU PSK DX Contest 2010. The objective of the contest is to establish as many contacts as possible between radio amateurs around the world by using the BPSK63 mode. Everybody can work everybody for QSO and multiplier credit. The 7th contest will be held from 12:00 UTC on 22.05.2010 to 12:00 UTC on 23.05.2010. The rules and other information can be found at our website. Since this year it is strictly BPSK63 contest, no other modes are allowed. The maximum output power is 100 watts. Recommended frequencies are: 80 meters (3.580 – 3.590 MHz), 40 meters (7.040 – 7.050 MHz), 20 meters (14.070 – 14.080 MHz), 15 meters (21.070 – 21.080 MHz), and 10 meters (28.070 – 28.080 MHz). All the very best and see you all in the EU PSK DX Contest 2010!
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