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    Re: question on air sextant MKIX
    From: Alexandre Eremenko
    Date: 2007 Feb 12, 11:40 -0500

    
    Geoffry
    
    > Alex - I have a Mk IX bubble
    > sextant and the modern type C batteries
    > fit in fine with room to spare.
    
    You mean two of them?
    
    > Do you have a Mk IX bubble sextant
    
    Yes, I do.
    
    > and are you saying modern C batteries do not fit into it?
    
    No, I was not saying this.
    I only asked whether it needs one or two C-batteries.
    
    Alex.
    
    > Or are you confusing the British made Mk IX with the American made
    > Link A-12, which will not accept the modern C cell?
    >
    > Geoffrey Kolbe
    >
    > At 01:44 12/02/2007, you wrote:
    >
    >
    > >Size C won't provide as much amperage over time as the Ds; ie, they
    > >won't last as long.  The Ds also can supply more peak amperage, but
    > >that usually isn't a consideration with lights.
    > >
    > >Alkaline batteries usually last longer than carbon-zinc batteries,
    > >but there can be subtle changes in size that can make them less
    > >suitable.  Everready "Classic" batteries are the old-type carbon zinc
    > >for which American instruments would have been designed.
    > >
    > >Fred
    > >
    > >On Feb 11, 2007, at 8:04 PM, alex wrote:
    > >
    > > >
    > > > As I understand the batteries exactly fitting this sextant MkIX
    > > > are not produced anymore.
    > > > What sort of batteries can be used?
    > > > My (superficial) investigation shows that C-size batteries
    > > > are likely to fit in diameter. How many are needed?
    > > > The batteries only have to feed 2 bulbs.
    > > > Are these 3 volts or 1.5 volts bulbs?
    > > >
    > > > In general, what is the difference between size C and size D
    > > > batteries? Both are 1.5 volts, but size C is smaller.
    > > >
    > > > Alex.
    > > >
    > > >
    > > > >
    > >
    > >
    > >
    > Border Barrels Ltd, Newcastleton, TD9 0SN, UK
    > Tel: +44 (0)13873 76253   Fax: +44 (0)13873 76214
    >
    >
    > >
    
    
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