I see that the ARRL DX CW contest is next weekend. I haven't decided yet whether I will come on and give away a few points, nor whether I will operate QRP or run 100 watts. I think it will depend on propagation.
One thing I am unsure about is what exchange to send. I believe DX stations - which means me in this context - are supposed to send RST and power.
If I'm running QRP (5 watts) do I send "5NN 5" or "5NN 005" or even "5NN TT5"?
If I'm running 100 watts would I send "5NN 100" or "5NN 1TT" or even "5NN ATT"? These short form numbers confuse me a bit. I've heard 1 being sent as A, and 0 (zero) being sent as the letter "O". Or at least, I think I have.
If I change the power as I normally do and run 100W only when it is needed do I send the actual power I am using or stick to the same exchange (100W) throughout the contest?
Do I work only US stations or will all stations, even Europeans, benefit from working me with a point?