"Irv Finkleman VE6BP" wrote in message
...
I have been wondering which way the fans on my TS-930 should be blowing.
Should they take the ambient air from outside and blow
it on the heatsink, or should they be evacuating the inside air
in the vicinity of the heatsink and blowing it out? I have been
restoring the unit and both fans required replacement.

I've surfed a number of sites on the subject but can never get
a definitive answer.

Thanks in advance for any assistance...

de Irv, VE6BP
Hi
My opinion is quite simple:
Pulling air out of an enclosure will ,at the limit, create a vacum inside
In such case radiators are totaly useless only ,by inertia,delaying
complete failure.
Pushing air in allows filtering it from dust and is clearly the way to go.