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Thread: CO2 tube question

  1. #1
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    Default CO2 tube question

    Does a CO2 laser tube need a ballast resistor like the old HeNe tubes ?? I hooked my up and toasted the power supply in seconds even with the current set at minimum.

    Mike

  2. #2
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    The power supply should have one in it. If you made the power supply that you need a ballast.
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  3. #3
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    swamidog is offline Jr. Woodchuckington Janitor III, Esq.
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    good question. my co2 laser is rf excited so it's not the same at all.
    Attached Thumbnails Attached Thumbnails co2-head-small.jpg  

    starbucksburn2-small.jpg  

    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

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    Holy Fuck! That is tiny! It looks like a YAG!
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    Ben --

    I got the supply off Fleabay. No schematics.... I did have the HV transistors to repair it though. At 15 mA, is 1K enough !! Maybe 15K would stablize it better. Only 3.3 watts disipation.

    Mike
    Last edited by Hemlock Mike; 04-30-2007 at 19:53.

  6. #6
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    Try 50k ohm. Make sure the wattage is >10W
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    Ben --
    I have 2 - 25K , 10 Watt resistors. Should help. I have plenty of volts available - Up to 14 KV ... Maybe I should go higher yet - It will still ignite.

    Mike

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    swamidog is offline Jr. Woodchuckington Janitor III, Esq.
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    Quote Originally Posted by Laser Ben View Post
    Holy Fuck! That is tiny! It looks like a YAG!
    it is very much like a lady's purse model laser..
    Attached Thumbnails Attached Thumbnails luxar.jpg  

    head-test-wood.jpg  

    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  9. #9
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    Ben --
    I wii start with the 2 - 25K resistors. The voltage drop accross each is just under 400 volts -- Should be safe there.

    SD -- That's a super little laser !! If you are cutting in those pix, is there gas assist ?? How many "KW" !!! Where did you find a toy like that ??

    Mike

  10. #10
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    OOPS -- I put in a 50K resistor and it draws about 25ma .... Burned through a 1" piece of foam rubber and then smoked a table 4' away !! No Lens !!!!! 1/4" beam.
    Thanks for the advice !!

    Mike

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