deadkey is rms, kep it low and let the amp do the work. keep in mind its not a powerhouse, and wont be as clean as a ameritron, henry, or heathkit. it should do you just fine for long range dx. just rember you gotta let them warm up. you cant just turn them on and start jabbering. the newer graphite tubes that the klv uses will take it better than the old glass sweep tubes but it will make for a short life.