Hitting my head against a wall alignment issue

[jkwilborn (Jack Wilborn)]

You can follow this post for checking the tubes TEM mode.

Lost of power on our Reci W6 tube?

If you have properly working tube aligned and clean optics proper focus It will work, so one of these is having a problem. A proper alignment should start at m1 (mirror 1) examining the beam quality from the source (tube). This should resonate in TEM00 mode or it never will align properly. I cut targets out of watercolor paper so I can press fit them into the mirror holders. [target-sheet-crop-tube] The burn mark needs to be light enough to see the Gaussian power distribution curve acr…