Re: Lisa Fans (was Re: Question about Sun Rem SCSI card)

From: compu_85 <perkins.jason_at_email.domain.hidden>
Date: Sun, 19 Feb 2017 07:03:21 -0800 (PST)

So on a stock Lisa, would it make sense to try to add a fan to the card cage? What's the biggest power consumer? I've never noticed the vents above the card cage feeling extremely "hot", but I know that there could still be some hot spots inside.

I added a fan to my power supply - one which runs almost silently on the 5v supply. There's some gentle warm air coming out of the top vents, so I'd think it's doing its job.



On Sunday, July 27, 2008 at 4:48:56 PM UTC-4, James MacPhail wrote:
> >pic of card cage fan installed

> <>
> (Thanks for the pics Rick!)
> Although the added card cage fan is in a position that will cool the memory
> boards, AFAIK they do not require anything more than convection cooling.
> The primary purpose of the card cage fan is to cool the XLerator. It was
> required for the original 16 MHz XLerator and the XLerator 18. It is not
> usually required for the XLerator 12.5, but if the ambient temperature is
> high it would be a good idea.
> >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
> I believe that nearly any electronic device that runs hot will last longer
> with additional cooling. My rule of thumb is that any part that is "too hot
> to hold your finger on" needs more cooling. That threshold is about 50
> degrees celcius and seems to be fairly consistent from person to person.
> As Ray said, the power supply seems to be the most vulnerable item in the
> Lisa, so I try to always have a fan cooling it.
> Since the cooling effect of moving air is in proportion to the square of
> the velocity (IIRC), even a very gentle (and thus quiet) airflow makes a
> big difference in temperature for something that was originally convection
> cooled.
> I see that this thread has gone way off subject, so I have changed the
> subject line to make the archives more useful.
> HTH,
> James

You received this message because you are a member of the LisaList group.
The group FAQ is at
To post to this group, send email to lisalist_at_email.domain.hidden
To leave this group, send email to lisalist+unsubscribe_at_email.domain.hidden
For more options, visit this group at
You received this message because you are subscribed to the Google Groups "LisaList" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
For more options, visit

Received on 2017-02-19 10:07:18

This archive was generated by hypermail 2.4.0 : 2020-01-13 12:15:16 EST