Ivory CPU Heatsink and Instability

Sat, 06 Aug 2016 14:13:58 +0000

One of the theories about the instability of my Symbolics XL1200 is that the CPU has no heatsink and so it is suffering from thermal problems after a while. (15-30-ish minutes)

David K. Schmidt was kind enough to send me an old heatsink. It’s 38x38x5 mm and has 11 fins on it, as you’ll see on the pictures; slightly smaller than the Ivory CPU itself.

First I cleaned the old epoxy from the heatsink using acetone, which was surprisingly easy to do.

Heatsink on Symbolics LISP Engineering

Ivory CPU Heatsink and Instability