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Trinitron gun

Discussion in 'Electronic Design' started by Jeff Layman, Nov 11, 2010.

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  1. Jeff Layman

    Jeff Layman Guest

    There has been some discussion in another newsgroup about what this
    looks like. The Wikipedia entry says "The single-gun consists of a
    long-necked tube with a single electrode at its base, flaring out into a
    horizontally-aligned rectangular shape with three vertically-aligned
    rectangular cathodes inside".

    Can anyone supply a link to a picture of a trinitron gun anywhere on the

  2. John Smith

    John Smith Guest

    Above that it says: "The Trinitron design incorporates two unique features:
    the single-gun three-cathode picture tube, and the vertically aligned
    aperture grille."

    Which makes sense and I think it is correct.

    However I think the part you quoted should be rewritten.
    The best I can find online is: gun

    But from my bookshelf, the trinitron gun structure (diagram not image,
    viewed from above) and a description of how the tube works is in the
    1972/1973 edition of Radio and Television Servicing. Do you want a scan
    sent/uploaded anywhere?

    Old Guy
  3. Fredxx

    Fredxx Guest is the best I came up with though it doesn't
    have a diagram of the Trinitron but of a standard CRT gun. There are some
    errors in the article.

    I am intrigued how the Trinitron is different.
  4. TTman

    TTman Guest

    I think it had the RGB guns effectively in one tube. I had one in a
    panasonic colour TV in the early 70s
  5. TTman

    TTman Guest

    Or was it a Sony? I forget now
  6. Mr.CRC

    Mr.CRC Guest

    How on earth could the guns possibly be not in the same tube?
  7. Rich Grise

    Rich Grise Guest

    Google probably can.

    Good Luck!
  8. TheM

    TheM Guest


    But trinitrons were impressive. I remember walking into the living room late at night with lights off and eyes well adjusted to
    total darkness and I heard that TV "hiss" from the switcher. TV looked as if it was off and was completely dark, but it wasn't,
    wrong video source was selected.
    Try that with any other tube or LCD (backlight off is cheating).

  9. Jeff Layman

    Jeff Layman Guest

    Yes, I was a bit puzzled by it, but do not have the knowledge to amend it.
    Not at the moment, thanks, John. The link you supplied was ok. Many
    sites discuss the nature of the aperture grille and show diagrams of how
    this is constructed, but it is strange how few show the other unique
    feature of the trinitron tube!
  10. John Smith

    John Smith Guest

    Actually I think that the part which does make sense should say that the
    aperture grille is horizontally aligned. The aperture grille is not
    vertically aligned. The tube would be a mile high if it was. The cathodes
    are also horizontally aligned.
    It could be that whoever wrote it knew what they were talking about but
    didn't write very clear English.

    Old Guy
  11. Fred Abse

    Fred Abse Guest

    That's not the tube, it's down to accurate black level maintenance. Any
    CRT will do that with the right circuitry.
  12. Rich Grise

    Rich Grise Guest

    I used to work on video games, and adjusting the monitor was a dream -
    there were four one-turn trimpots on the neck board, with red, blue, green,
    and black knobs. The black one was "black background." :)

    Of course, they were WAY too expensive to use the same kind of circuit in
    consumer TVs.

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