You guys are correct, it is broken, I hadn't noticed it but when I turn it side to side there is a slight piece of glass inside.
I would sell the one good tube and both motors for $10.00 plus shipping. I hate to throw them away.
I have two of these and 2 motor drives that mirrors can be connected to.
I have no idea of their worth?
They have been sitting in a box in my closet for when I have time to build a laser project, no time yet so time to go.
Any offers or suggestions of value?
They were tested when I put them...