Ran a dx 2517 with an elkin 12 tube for years, 2 watt dead key 40 watt swing would get me almost 1300 watts, I want to get a new base and I'm looking at the rci 69 base but it says 100 watt swing, I don't know if I should swing 100 watts into the elkin,? Can it be adjusted? Is there a better...