Component Identification

Discussion in 'General Electronics Chat' started by Regected, Sep 11, 2009.

  1. Regected

    Thread Starter Active Member

    May 24, 2009
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    I need some help identifying some diodes a friend pulled out of a military grade electric fence power supply. The company that I believe made it does not offer any information on them. My biggest concern is the rated voltage. Given the size and shape, I would have to assume rather high voltage. The diodes were configured with a series of capacitors into a voltage multiplier. I don't have the model number or any information about the original power supply. Any help would be appreciated.

    [​IMG]

    http://api.ning.com/files/5Ytsbun9O...-iWlbbUZZBb3eHJPuTZhJ3O*8U/ITTTV182K80J6H.JPG
     
    Last edited: Sep 12, 2009
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Where is the image?
     
  3. Regected

    Thread Starter Active Member

    May 24, 2009
    30
    0
    The image tag refuses to work for me. It shows the pic in the preview, but not in the post. I added a hyperlink to the image.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Yep - it's a Milspec part all right. You might have a better idea about the voltage rating by looking at the capacitors' ratings.

    For a cheap attempt at a substitute, solder a string of 4 - 5 1N4008's and try that.
     
  5. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    It is an 18 KV diode used in the high voltage powersupply of an black and white TV.

    Greetings,
    Bertus
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Forget the 1N4008's then. You will need an equivalent part.
     
  7. Regected

    Thread Starter Active Member

    May 24, 2009
    30
    0
    I was really hoping to use these in a new project. The capacitors in the multiplier are rated at 10k volts, with two pairs of parallel capacitor in series, so I would assume a minimum rating of 20k volts. Maybe the diodes are rated for 18k volts at 2 amps? 18-2k would make sense then.


    He he...opps. Got a reply while writing my own.
     
  8. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,346
    Hello,

    As far as I know the diode was rated for 80 - 100 mA.
    It was also used in the old days as the rectifier in the high voltage power supply.
    The output was going to the side of the CRT.

    Greetings,
    Bertus
     
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