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Anyone familiar with tiny CRT tube?

Discussion in 'Electronic Components' started by Impmon, Sep 26, 2007.

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  1. Impmon

    Impmon Guest

    I ripped one out of a non working video camera and from what I can
    tell, it only needs 3 lines to display video.

    http://personalpages.tds.net/~wilykat/samples/DSC03883.JPG

    The white connector visible goes to the camera. From left to right,
    pin 1 goes to K of LED and no where else so it's probably only used
    for record activity. Next pin, the trace goes only to an IC on the
    other side of the board. The last 2 are GND and Vcc respectively.

    Few diodes, few caps, few resistors, and a transistor, nothing else on
    the bottom. The transistor is probably the HOT

    http://personalpages.tds.net/~wilykat/samples/DSC03884.JPG

    top side of the board. The IC seems to be used for synch separator
    and video to drive the CRT. 4 wires from the bottom of the picture
    goes to 2 sets of yokes. 4 wires from other connector goes to the end
    of CRT, probably for filament (2), cathode, and grid. The thic wire
    goes from the front of the CRT to a little silver box, a transformer
    likely.

    IC is marked BA7149F / 023 121

    http://personalpages.tds.net/~wilykat/samples/DSC03885.JPG

    shows the whole CRT.

    SO any idea what voltage is Vcc? 5v? The datasheet I found for
    BA7149F doesn't specify power supply voltage but it looks to be 5v,
    probably max 5.5v.
     
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