[R-390] R390 cooling fan

[Dan Arney]

I find it very interesting that all of these units operated 24/7/365 
with no problems all over the world in less than ideal operating 
conditions. With all kinds of operating voltages with minimum of down 
time in arctic, tropical, desert and you name it.

And as  our lost or lurking in the sidelines Nolan Lee proved he had a 
rack of them running 24/7 for I think he said like 5 or 6 years with 
"ZERO" failures.

We still have wanna be enngginneerrss trying to re-engineer the wheel.
This series of radios were designed by guys using paper graph, Drawing 
machines and a item that was the current computer of the day, normally 
called a BRAIN located in a cavity in between the ears and the keyboard 
was called a slide-rule. The hard drive was the educated memory bank 
that they were born with and nurtured to the point that in today's world 
people are still in AWE at how well they still work over 50 years down 
the road.

Nobody on any of these reflectors have any idea of how many are still in 
daily service.

Maybe someone can run a rack of radios with fans and variacs for 10 
years and come back and prove that Nolan and the Gov. were all wrong.

Somebody please show me any product in anywhere close to the numbers 
made of these fine radios, made in the same time frame that still exist.
That are still up and running/operating with the same reliability.

Figure this one out Why not operate and enjoy the radios instead of 
"TTGTFSOOTBP". The last 2 letters have to do with black pepper.

Hank
KN6DI

Here I go sliding off of my soapbox. Enjoy.