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    Re: Refilling Mk IXA Bubble Sextant - Lessons Learnt
    From: Herbert Prinz
    Date: 2004 Mar 6, 10:41 -0500

    Jared Sherman wrote:
    
    > If anyone is doing this and then resoldering to close the tube, note that
    > "silver solder" generally has a lower melting point than conventional
    > lead-tin solder, and probably would be the better choice as it would allow
    > less heat to be used.
    
    This is no longer relevant to Zvi, whose bubble sextant already "works like a
    dream" again. But just for the record, silver solder has a HIGHER melting point
    than lead-tin. Despite its other advantages for electronic circuits, this makes
    it trickier to work with, particular in the vicinity of heat sensitive
    components. It's the very reason why the inexperienced often avoid it. Also, it
    requires a flux that might contaminate the liquid in the tube.
    
    Herbert Prinz
    
    
    

       
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