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    Re: Fluids for Bubble Sextants and Sealing Methods--Paul D.
    From: Paul Dolkas
    Date: 2016 Jan 3, 13:39 -0800

    Robert-

     

    Rest assured, I am not trying to open the chamber. I took a look at it while restoring the A-12, but the lockrings were stuck,  and I wisely figured I should leave well enough alone.

     

    I did however spotface the area around the filling port so it would seal better with the o-ring equipped screw. Hasn’t affected the operation at all, but it makes refilling a lot easier.

     

    I’m curious about using silicone fluid – is this an advisable substitute for the Xylene for this type of sextant? I’ll give you a call to discuss.

     

    Paul Dolkas

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Robert Swartz
    Sent: Tuesday, December 29, 2015 10:40 AM
    To: paul{at}dolkas.net
    Subject: [NavList] Re: Fluids for Bubble Sextants and Sealing Methods--Paul D.

     

    Paul:

    If you are trying to open A-12 bubble chambers to clean then, don't, you'll ruin them.

    Through many years of restoring these instruments, I have developed an effective procedure to clean their interiors.

    Call me at 773-330-0860 and I'll explain.

    Robert Swartz

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