On Apr 10, 11:46 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
Paul G. wrote:
On Apr 9, 7:52 am, Wolfgang <w...@work.com> wrote:
I also removed the aluminum top of the power supply as I figured out
that the most heat is generated to the rear end of the power supply but
the vent mounting is at the front and does not give good air circulation
in the back.
Yes, the whole IIGS is not designed to cool well. It's easy to blow
air around inside, but what you really need to do is draw cool air in
and exhaust the warm air. I ended up using a fan mounted to the
powersupply and a strip of foam between the powersupply and the lid
so that the hot air from the P/S is forced to exit out the top. Since
the vents in the lid are so small the natural tendency is for the fan
to simply move the air in a nearly closed loop, getting hotter with
each cycle. Over time, this dries out the electrolytic capacitors,
and your P/S fails.
This is why a fan that sucks air out of the top of the case is so
effective, relative to internal fans.
A "laptop cooler" USB fan (usually actually two fans in a 3/8" thick
case) placed upside down over the top of the case can accomplish so
much, while remaining practically silent and using less than 200mA
of +5v power (less than one Watt).
That would be helpful, certainly, but doesn't provide positive
ventilation to the P/S and the path of least resistance is again going
to be a loop. The frustrating thing is that the IIGS case is like a
bathtub. The slots in the lid provide what little ventilation there
is. I put another strip of foam front-to-back, just right of the P/S
on the outside of the lid in an attempt to route the hot air to the
left, so it wouldn't just get pulled back in on the right side.