[Drake] Cooling fans - blow in or out?

[KB9GKC at aol.com]

Hello Gentlemen,
 
This was hashed over about 4 years ago (have a look in the archives).   The 
result was that someone in the group took a scientific approach and actually  
measured the temperature inside the PAs cage.  I remember very clearly the  
results.  The temperature inside the cage was dramatically reduced by  drawing 
the air out rather than in, the hypothesis was that the fact that  drawing the 
air through the small cage holes was more effective then trying to  blow air in 
and the air becoming turbulent when it missed the holes and ran into  the 
metal and bounced back towards the fan.
 
So blow the air out and away.
 
73 and keep those tubes lit.
Douglas