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TEC on TO3 red diode

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
 





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.
 
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