I saw a pair if these tubes which looks sweet, it appears they can handle higher voltages than a regular el84. I think they are a miltary bersion of the el84. However, there is something about a "pinout" on this model which may make it incompatible for certain EL84 amps. I have two questions: Is the fact that it can handle a higher voltage mean its better? I don't know what this "pinout" really means but I would like to know if anyone knows if its OK for the DSL 201. Thanks in advance for the help.