On Wed, Jan 28, 2015 at 10:56 AM, Charles Steinmetz <csteinmetz@yandex.com> wrote: > > I'd think a couple of pieces of pink (non-conductive) closed cell >> antistatic foam, one hollowed out a bit with a penknife, would work well. >> It would both shield from airflow and provide insulation. >> > > The problem is that an LTZ1000 (or LM399) runs hot enough that most > plastics you find lying around won't stand up to it for very long (some of > them melt almost immediately when you power it up). This is true even of > polycarbonate, which is one of the most durable common plastics, and is why > the original caps were made from polysulfone. > There seem to be many examples using pink foam as insulation over on the EEVBlog forum thread and no complaints at all about the foam melting... However, they are using DIY boards for the LTZ1000(A), not the HP 3458A board. I guess it's time to go and apply some pink foam to my board. Orin.