Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:
>
> Well, this oven i was thinking about has been sitting there for at 
least  
> 20 years, and i would assume it was in use a few years before 
getting in  
> such a beaten-up shape...
> I would assume glass wool or rock wool must be heat resistant, no?
> ST
>

Yes, glass wool is that you need. You can make a sandwich with glass 
wool and aluminium foil. The foil must be inside the heated room, 
between the heaters and glass wool to reflect the heat inside. This 
way you can increase heaters eficiency to a quite hi level.


Adrian