TEC on TO3 red diode

[robjdixon]

Cool. I got it before I got any TO-3 diodes, so its size surprised me a little, but it seems solid enough. Good luck with the build

 

[HIMNL9]

If your unit have an aspherical and a cylindrical lenses, then you have a FAC unit ..... nice .....

First align the diode axis with the cylindrical lens and fit it, so then you can collimate it at better with the aspherical one.