4. Contest Exchange: The required exchange consists of:
4.1. A consecutive serial number;
4.2.1. “Q” for Single Op QRP (5 Watts output or less);
4.2.2. “A” for Single Op Low Power (up to 150 W output);
4.2.3. “B” for Single Op High Power (greater than 150 W output);
4.2.4. “U” for Single Op Unlimited Single-Op Unlimited High Power and Single-Op Unlimited Low Power both send "U")
4.2.5. “M” for Multi-Op (Multiop High Power and Multiop Low Power both send "M")
4.2.6. “S” for School Club;
4.3 Your Callsign;
4.4.1. The last 2 digits of the year of first license for either the operator or the station.
4.4.2. An entry must send the same Check throughout the entire contest.
4.5. ARRL/RAC Section (click here for the official list)
4.6 Exchange Example: NU1AW would respond to W1AW’s call by sending: W1AW 123 B NU1AW 71 CT, which indicates QSO number 123, B for Single Op High Power, NU1AW, first licensed in 1971, and in the Connecticut section.)
Good grief, what an exchange. When is the next major CW DX test?