I had a K40 that I adored and used quite a bit. I had a long cut job where the tube probably got too warm and it switched to TEM01.
I decided to build a better laser out of the leftover parts. I purchased a 45W tube from lightobject a month and a half ago.
Today I finally got the point of my first test fire and the new tube appears to fire in TEM01 mode.
Can this be caused by using the same PSU in a different machine? Can anyone offer any advice? I sent lightobject an email and have not yet received a response but it is after hours. Thanks all