[R-390] R390 cooling fan

[John KA1XC]

Jeeeeeeeez Hank the guy is just putting some air across the hot regulator 
tubes to keep the radio cooler!  May I point out that your favorite receiver 
the German EK-07 has a cooling fan built in. =:^0  Also Nolan didn't have 
R-390s, he had the much cooler running R-390As.

73 es :^)

John

----- Original Message ----- 
From: "Dan Arney" <hankarn at pacbell.net>
To: "Roy Morgan" <roy.morgan at nist.gov>
Cc: "Brad Huff" <huffb at avalon.net>; <r-390 at mailman.qth.net>
Sent: Tuesday, July 19, 2005 7:43 PM
Subject: Re: [R-390] R390 cooling fan


>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.
>