[NLRS] 439MHZ Radar

[Dr. Gerald N. Johnson, electrical engineer]

Ah, I should have been more correct to say, "cooled with a none acqueous
syntetic high dielectric liquid." For some reason I silicone on the
brain at the time so I called it a silicon oil.

Water does cause problems in computers when it spills. More damage in
telephone exchange computers where the ringing voltage is enough to etch
away significant board traces while immersed in nearly clean water.

Much of the test speed of the Intel and AMD chips depends on executing
from on chip cache. Swapping tasks that are larger than the on chip
cache is a performance killer.

Back in the mid 60s, Collins used Dowtherm-A for cooling a 250 KW dummy
load. It was supposed to be inert and to not bother people, but we found
its fumes could be ignited explosively. And when we kept technicians
immersed up beyond their elbow for a week or two at a time, they claimed
to be ill as the result. Might have been a reaction or reluctance to
keep swimming in the Dowtherm-A whose odor was not very pleasant.

73, Jerry, K0CQ
-- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.