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    Re: Fluids for Bubble Sextants and Sealing Methods
    From: Herman Dekker
    Date: 2015 Dec 28, 11:48 -0800

    Hello Robert,

    Any idea how long the A-12 bubble chamber keeps the xylene in, if it is properly sealed?

    I have one A-12 bubble chamber with een small screw that has a beveled point in the
    bubble chamber there is a beveled drilling that fits the point. It has a normal head for
    flat screwdriver. The other bubblechamber has the standard screw with ball.

    One other question about the A-12.
    There are two filters for the sun, a light and a darker filter.
    The problem I have is, that the first filter that can be used, is the darkest filter then the lighter
    filter. I think they are mounted reverse?

    The former owner must have fiddeled with the sextant, because it is about 13 degrees to low on the scale.

    I think I have to disassemble the sextant to solve this problem?

    regards,

    HermanD

       
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