Re: Question about Sun Rem SCSI card

Rick wrote:
> I don't know why it took over 8 years for
> someone to notice
> that photo and comment on it.

I think computer collecting and restoration is in its infancy.

I appreciate your site. It has a bunch of stuff that I can't find anywhere else on the web.

For instance, you show a fan installed
under your 1.5MB memory board on
http://www.lisa2.it/2Meg.html
and
http://www.lisa2.it/XLerator.html
I have a fan installed in my Widget
drive cage. Do you know if the Widget drive cage fan provides enough circulation to cool the 2MB memory board or would a
second fan be required?

Incidentally, while on the subject
of Lisa cooling, I needed to repair
my video card before I could get my
Lisa to work. R1 was burned and
I saw brown discoloration typical of
overheating around the leads of U1.
I replaced U1 and noticed the thermal
paste between U1 and its heat sink
had dried. I tested the U1 I removed
and it was shorted internally.
I've also noted that a lot of heat
radiates from the Lisa in the vicinity
of the video card when it is running
with the cover off. All of this
leads me to believe that it is prudent
to have forced cooling (a fan)
with the Lisa, contrary to what I've
read elsewhere (E.g.; "there is no need for a fan to aid cooling",
http://lisa.sunder.net/LisaProjectDocs.txt). Perhaps dissipative cooling was
fine when Lisa's were brand new,
but aged Lisa's with drying out
thermal paste and aging electrolytic
capacitors might have their lives
extended with cooling.

Luke       

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