So I received my laser power meter today. Just for fun and giggles, I tested the tubes in both of my K40’s The one registered at 29W at full power, which I fully expected to see a low value, but what shocked me is that the second one was actually 42W at full power. Throws a wrench into my plans to compare tube power/life vs. high/low mA settings.
For a start, could you tell us any spec/info you have on each tube. (pay attention it’s frequent you could have 2 labels on top of each other with different’s info).
does the tube’s lengh the same ?
Will take a look today.