Carl_eber, Sedond is right. You've never said what tube pramps you have tried with your CD50 (if, in fact, you really own one). Looks to me like more of your pompous posturing. All talk, no walk. Admit it Carl, you tried your CD50 driven directly and have never gone back. Look what you have done, again, Carl. You log onto a thread in your pushy way, chip stuck on your shoulder, and wreck it for everybody else. Why don't you get another hobby and leave the rest of us alone? Kendall