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Alex,

On some models, the illumination system for the bubble unit cannot be
activated until the wind up mechanism is fully engaged. At least that is the
case with my MK IX A.  Try winding the mechanism all the way. Don't trigger
it unless you reckon you can get a good shot in under two minutes.

Failing that, there may be some corrosion in the light socket. Try a squirt
of WD-40.

My two bits' worth.

Robert


----- Original Message -----
From: "alex" 
To: "NavList" 
Sent: Monday, February 12, 2007 4:56 PM
Subject: [NavList 2164] Re: question on air sextant MKIX


>
> Thanks to all who replied.
> C-batteries indeed fit nicely and work: I can illuminate the scales,
> but unfortunately not the bubble.
> And I don't know where the problem could be.
> I checked both bulbs: they are OK, and each of them
> illuminated the scales when placed in that place.
> And I made sure that there is no filter over the bubble.
>
> So the problem is either with internal wiring or (hopefully)
> with the light switch. Will try to disassemble the light switch
> in the top of the left handle. The screw-cap on it is really tough,
> probably one has to use some oil. Any suggestions?
>
> Alex.
>
>
>
> >
>



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