[Tig] PEC limiting MK3

[Rob Lingelbach]

On Jan 31, 2008, at 2:01 AM, Craig Leffel wrote:

>
> really dug into the Cell Box that our questions
> were answered... look
> for a yellow piece of glass that further blocks BLUE light - !!

At one point there was a filter installed by Bill Hogan in LA (the
providence of which I don't recall) that improved Ursa shading in the
blue PEC significantly. Before filter, impossible to get flat blue
across the wfm; after filter flat. I'm not sure if this is the filter
you're referring to Craig.

Rob