[R-390] Alternative to IERC tube shields?

[William J. Neill]

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