[R-390] Alternative to IERC tube shields?

[David C. Hallam]

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
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 
>