From: daniel@tamisier.fr   
      
   Hello,   
      
   I am a beginner with laser. I found an old  Omnichrome HeCd  laser Series 39X,   
   model 439XL Class 3b date sept 87. The power supply is model 100. For me it   
   doesn't lase. I have only a very pale violet light at the output of the tube...   
   The tube lights but after 5 minutes;  the light around the tube is blue. Owing   
   to what I read in the manual (not complete...) it is not normal. The voltages   
   measured on the banana plug at the rear of the tube are good. The counter on   
   the small pcb in the    
   tube box shows more than 3000 hours (not very good).   
   My questions:   
   Does this laser output a visible light or only an uv light ? there is no label   
   about the lambda on the tube.   
   In the bore, the light is very intensive but stop before the end of the tube,   
   is it normal? (obstruction by precipitation of cadmium ???)   
   I know general electronics but I am a novice with laser!   
   Thanks for your help.   
      
   Daniel from Paris France   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)