[inforoots] cooling core

[Van Snyder]

On Thu, 2007-12-20 at 12:51 -0800, Stan Sieler wrote:
> 
> This reminds me of what happpend around 1968. We at Max Planck
> Institute at Munich had an IBM 7090 with about 64 K memory - magnetic
> core memory.  The memory was oil-cooled. We often opened the door to
> have the hot side of the oil cooled by the air conditioned room. Our
> colleques from Heidelberg saw this and did the same. However their
> memory was air cooled. So opening the door disturbed the air flow and
> blew the memory. A very costly repair!

We had an oil-cooled 7094 memory at JPL.  It was turned off for the
Christmas holiday.  It never worked again.  IBM had to replace it.  They
ultimately found that tiny bits of solder that had been suspended in the
oil settled on some connections.

-- 
Van Snyder                    |  What fraction of Americans believe 
Van.Snyder at jpl.nasa.gov       |  Wrestling is real and NASA is fake?
Any alleged opinions are my own and have not been approved or
disapproved by JPL, CalTech, NASA, the President, or anybody else.