P3D Re: Viewer Light Bulb Question

[Steve Berezin <sbere@xxxxxxxxxxxxx>]

Dr. George A. Themelis wrote:
> 
> >is there any reason not to use a Xenon bulb (UV exposure maybe?).
> 
> I am not an expert, but I think that the gas mixture ("Halogen" vs.
> "Xenon" vs. Nitrogen?) has very little to do with UV emission.  The
> "glass" envelope does.  Halogen bulbs run at higher temperatures and
> have quartz glass which is almost transparent to UV, hence the higher
> UV emission from halogen bulbs.  I am not sure if the 2.5V halogen
> bulbs used in viewers actually have quartz glass.
> 
> >I've noticed a lot of Halogen usage and have found that there are a lot
> >of Xenon bulbs available for low voltage applications.
> 
> Actually, there is only one halogen 2.5V bulb with a screw E6 base, used
> in these viewers.  I believe a Xenon bulb would be as good.  Not having
> to worry about the base gives you more choices of light bulbs.
> 
> George Themelis

Thanks George, 

I've noticed the same thing.  Small bulbs with screw on
bases are very rare in halogen. I found a few sources that
claimed to be able to get an E6 Halogen from China (by way
of Europe) but they required large minimum orders- also I
was told by their distributors that they are of suspect
quality.  

I found it would be easier to change my viewer to
accommodate the large variety of slip in halogen and xenon
lights which are available.  Unfortunately I have found the
sockets are impossible to find so I have to make them from
scratch out of copper or cut them out of cheap flashlights. 
Not for the faint of heart.

Thanks for the help.

-- 
Steve Berezin
mailto:sbere@xxxxxxxxxxxxx


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