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    Re: Looking to purchase a MKIXB bubble sextant
    From: Paul Dolkas
    Date: 2013 Jan 26, 11:18 -0800



    My recommendation would be the A-12. It’s pretty simple – the “averaging” device in particular – and it can be used in 2 modes: 1) for shooting the sun, and 2) for shooting faint stars. The latter is really nice because it has a huge field of view, so you can easily recognize the constellation. There’s also an restoration manual on line which has a ton of pictures, and one of the NavList members (Bob Swartz) is super knowledgeable in case you have questions.


    The downside is that the bubble chamber has a fixed bubble size, and is a pain to refill (although there’s an easy modification that makes it much easier) so it’s nice to have two chambers with different sized bubbles. #16 looks like it might have two chambers (there’s one in the “spare” slot of the case) so I would inquire about that one. Also make sure it doesn’t have old batteries rusting inside the unit – I can attest to how difficult it can be to clean those out!


    I’d love to hear what others have to say on the choice. I’m not too familiar with any of the more complicated ones.




    Paul Dolkas


    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Bruce J. Pennino
    Sent: Saturday, January 26, 2013 8:03 AM
    To: paul{at}dolkas.net
    Subject: [NavList 22122] Re: Re: Looking to purchase a MKIXB bubble sextant



    Hello Paul, Garret, and All:


    I'd also  like to restore a bubble sextant, but a relatively simple one.  I was considering a MK 1X as a first choice and a MK1X A as a second choice.  Navy Mark V as a 3 rd possibility .  In the discussion a  4-5 years ago (before I was on List), which  I found very helpful, I recollect the A-10 and A -12  were simple and excellent but had a few issues: 1. Bubble difficult to replace/reform? 2. A-12 needs the cap enlarged .01" or so ......   Any info would be helpful.


    Thanks l





















    ----- Original Message -----

    Sent: Saturday, January 26, 2013 2:56 AM

    Subject: [NavList 22119] Re: Looking to purchase a MKIXB bubble sextant




    Take a look at the collection Mark Sudbury inherited. He has a MK1XA for sale – I’m not sure is that is close enough.







    p.s. I’m curious – why the MK1XB? I bought an A-12 about a year ago because I wanted something simple that I could restore (which it is – to a fault). What is it about the MX model that interests you?


    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Garret Cost
    Sent: Friday, January 25, 2013 10:22 AM
    To: paul---net
    Subject: [NavList 22110] Looking to purchase a MKIXB bubble sextant


    I am interested in purchasing a MKIXB bubble sextant in good working order. I plan to use this inflight so I am not looking for a "doorstop". Any info anyone has will be gratly welcome and thank you in advance.
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