[R-390] Top and bottom covers-Why?

[Drew P. via R-390]

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Perry Sandeen wrote: 

<snipped>
  
" The *A* is already a component cooker that could use fan
 cooling to extend its operational life.  Why would you
 want to put them on an operational radio? 
  
 Unless of course you are using them as cooling fan mounts."
  

 I would suppose that the covers and Utah (not Nevada) plates would be nice on a museum piece, or if you operate the radio in arctic temperatures where the heat buildup would be of no consequence.

Otherwise, they might keep out a little of the dust and dirt.  This would be of most advantage for the RF deck with all its gears and cams.  I've thought about fabbing a cover for just the RF deck and a little of the surrounding region which would mostly seal out the dust.  I'd reduce heat input by solid stating the calibrator - would save the filament heat and don't need all that lovely olde-timey toob dynamic range there anyway. Howzabout a glass cover so you could see all the nice shiny mechanical parts staying shiny? I'll get right on it just as soon as those darned "Tall Penzons" go away and stop altering all my plans, and those "Round Tuits" stop siphoning away all my time.

Drew