[R-390] Alternative to IERC tube shields?

[Patrick]

Thank you Davis por closing the discusion with facts.
----- Original Message ----- 
From: "David C. Hallam" <dhallam at rapidsys.com>
To: "William J. Neill" <wjneill at consolidated.net>
Cc: "r390 list" <R-390 at mailman.qth.net>
Sent: Monday, August 17, 2009 4:36 PM
Subject: Re: [R-390] Alternative to IERC tube shields?


> According to TM11-856A "when operating fixed table-top installation in a 
> well ventilated case the top and bottom dust covers are to be removed 
> along with the tube shields on V201, V202, V203, V204, V205, V206, V505, 
> and V701.  This will reduce the bulb temperature of the tubes and will 
> prolong tube life."
> 
> David
> KC2JD/4
> 
> William J. Neill wrote:
>> While lurking and reading the many comments about tube shields, I've  
>> been running my R-389, two R-390s, five R-390(A)s, three R-391s, one  
>> 51J4, and one R-725, as well as three CV-116( )s, three CV-591(A)s,  
>> and one CV-157, without tube shields for 35+ years, just as I did in  
>> the US Army between 1966 and 1969.  We took 'em off for cooling  
>> purposes.
>> 
>> All my stuff is mounted in five CY-1119(U) racks with three inches  
>> between each piece of equipment as specified by TM for ventilation  
>> purposes and have never had any problems.
>> 
>> Plus, during the horribly cold (50F) winter months down here in the  
>> Great Dismal Swamp, two receivers turned on will keep about 45% of  
>> the house warm.
>> 
>> Bill Neill
>> Conroe, Texas
>> 
>> 
>> On Aug 17, 2009, at 1:49 PM, LEE BAHR wrote:
>> 
>> My alternative is to use a solid state rice box, and use a R-390 for  
>> special
>> occasions.  I am not going to get an ulcer or let the lack of IERC tube
>> shields in the world suck up 90% of my waking hours.  I have better  
>> things
>> to do with my life.  A R-390 is a radio, not a divinity!  If a tube's  
>> life
>> is reduced  10% because of no IERC, plug in a new tube.  You will  
>> then again
>> be good for another 30 years.  Buy some extra tubes.  Then you don't  
>> have to
>> worry about all this.
>> 
>> I plan to pet the dog, have a cool brew and listen to Polka Music and  
>> eat
>> Kilbasa.  You guys can bang your heads on the wall over all this.
>> 
>> Lee, w0vt
>> Member of the World Curmudgeon Society
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>> 
> 
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