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  1. #1
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    What is this in CRT Vacuum tube?

    Hello,
    what is this in TV vacuum tube?
    the top wire lock in tube hole?
    black thick wire with cap..

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  2. #2
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    Re: What is this in CRT Vacuum tube?

    The high voltage supply, anything between 25 to 35 kV



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  3. #3
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    Re: What is this in CRT Vacuum tube?

    Stick your finger in the hole, it will make you jump and maybe fatal, the tube can store a high voltage charge that could be present for a very long time after the power has been removed.



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  4. #4
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    Re: What is this in CRT Vacuum tube?

    Indeed, a shocking and unforgettable experience.

    For an electronics student, it was a rite of passage getting shocked by a CRT's high voltage.

    You would become a real engineer afterwards, learning both respect for electricity and that one should always double check everything before testing a circuit.



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