25 Apr
2017
25 Apr
'17
9:46 a.m.
On 4/25/2017 11:34 AM, Pete Turnbull via
cctalk wrote:
On 25/04/2017 15:55, Tapley, Mark via
cctalk wrote:
Is the same true even if they have
either a paper stick or a foil sticker
over the eprom window? I would *guess*
that stickers slow or stop the process
altogether.
- J.
On Apr 25, 2017, at 8:51 AM, allison
via cctalk <cctalk at classiccmp.org>
wrote:
Definitely. It takes a while, but
even behind window glass (which is
barely transparent to short wavelength
UV) EPROMs can eventually lose their
content. It happened to a friend who
had a machine with no top cover, on a
desk under a window, after about 5
years. But in direct sunlight,
certainly just hours, and possibly
just several tens of minutes if you're
unlucky.
Even after all that I'd still dry it
with a little heat (oven at 180F or
a clean empty
container in the sun.
Irrelevant for backplanes, but for
circuit boards, would any UV-erasable
PROMs want to be checked to ensure
their caps/covers are still in place
before exposure to sunlight?