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    Re: RAF MK9 Bubble Sextant
    From: Robert Eno
    Date: 2003 Jan 19, 17:07 -0500

    Hello Steven,
    I will PDF those to you this week.
    You are very observant. Yes, the fluid is contained in that vertical
    cylinder. You have to remove the solder, very carefully, so as not to
    introduce filings into the bubble chamber, to refill it. Stand by for the
    Always happy to assist. That's the beauty of people who are interested in
    astro-navigation: they are always willing to share information. I can't
    remember how many folks has assisted me over the years. It's all in my karma
    ----- Original Message -----
    From: Grobler, Steven 
    Sent: Sunday, January 19, 2003 4:32 AM
    Subject: Re: RAF MK9 Bubble Sextant
    > Hi Robert,
    > Many thanks for your reply.
    > Yes, my model has the dual eyepiece - one seems to give more
    > magnification than the other. Most of my controls work smoothly, except
    > for the 5 degree increase switch, which is probably a bit sticky. If I
    > figure out how to free things up I'll let you know.
    > I would be most grateful of the instructions for refilling the bubble
    > fluid. It looks like the fluid is contained in a small vertical
    > cylinder rising above the bubble chamber. The end of the cylinder has a
    > small nozzle that is sealed with solder. I am not sure whether the
    > system is supposed to be pressurized, or under vacuum, so I haven't
    > tried opening anything yet - I'll wait with baited breath for your set
    > of instructions!!
    > Thanks again
    > Steve G

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