Charlie,
I take it that your light is 6 volt 20 watt?
In that case you cold replace the regulator by any other brand 6 volt
one. Olympus made them too, for use with their microscopes and with
their OM-LSD lamps...
http://olympus.dementia.org/eSIF/om-sif/macrophotogroup/lsd.htm
Of course you should wire the regulator (kind of transformer) directly
to the light inside your microscope or lighthouse.
If you can find any halogen lamp regulators they will do a nice job
to, as long as they are intended for 6 volt (most are for 12 volt!).
One I found and which can be ordered for 6 volt is here:
http://www.geneq.com/catalog/en/dimmer_c_100w.htm
I remember that in the early days of household halogen lighting there
were some 6 volt dimmers around too. Nowadays everything is for 12
volt or for 110/220 volt directly from the wall outlet. Maybe you can
still find some of the old ones?
Good luck iwhen searching,
Frank van Lindert
Utrecht NL.
Wed, 19 Nov 2008 13:13:02 -0500, "Charles Geilfuss"
<charles.geilfuss@xxxxxxxxx> wrote:
>Greetings All,
> I know there are a few people on the List knowledgable about all things
>electrical, so I am hoping I can get some advice. I have a 15 year old Leitz
>Laborlux S microscope that I use daily. The rheostat (potentiometer)
>controling the light source is going bad. The light will flicker and does
>not adjust smothly in some of its range. Visual inspection of the part shows
>wear on the surface of the coil. Cleaning with De-Oxit did not help. I'm
>planning to replace the part but Leitz no longer carries parts for this
>model and my efforts to find an original part have been fruitless. There are
>plenty of potentiometers available form electrical parts companies, but how
>do I determine what specifications I need. The scope uses a 6 Watt, 20 Volt
>bulb and of course plugs into a 110 Volt wall outlet. Any advice?
>
>Thanks,
>Charlie
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