I appreciate all the help and suggestions. I spent a lot of time tonight investigating the problem without luck. I am still pulling my hair out to solve it.
Also, the intensity of the stray lines increase and decrease as I open and close the aperture on the lens. Both of these tell me that these stray lines are definitely coming through the lens.
Here are a couple of pictures showing the projected image fom a 6x6 negative and stray lights. I shot these in darkroom with my DSLR.
Here are some pictures I took of my enlarger.
I also took the Dichroic chamber off and took some closeup shots.
A couple of views of the bottom of the Dichroic chamber:
A few views from the top of the negative stage (without the Dichroic chamber):