P3D Re: Viewer variable illumination

[fj834@xxxxxxxxxxxxxxxxxxxxx (Dr. George A. Themelis)]

Talking about the Life-Like viewer, Steve wrote:

>The actual on
>and off switching is done with a normally closed microswitch on the
>bottom of the viewer which seems relatively trouble free compared to
>on/off switches of most vintage viewers.  

Steve, I think it is better not to use the term "microswitch"
which implies a different kind of switch.  It is just a small
contact switch.  To access it you have to remove the reflector
of the viewer (and put it back - not a trivial job).  I don't
think this contact is more trouble-free than other vintage viewer
switches and I don't see any reason for being such, since it is
just a simple contact switch between unplated metals.

George Themelis