[R-390] 3TF7 Ballast Tubes

[Drew P.]

Ben Loper ignited yet another grand reversal of Equine Entropy when he proclaimed:

> I came across some NOS 3TF7 Amperite tubes. 
> Should I make an offer on 
> > them
> > or is the conventional wisdom to replace them with a
> 12BA6 tube

Once again, we all benefit greatly from Wei-Li's tireless labors of distillation and compilation of the wisdom coursing through this forum over the years, in his masterpiece "Pearls of Wisdom".  This will be found at r-390A.net.  Following is the direct link. 

http://r-390a.net/Pearls/index.htm

Once there, click on "Ballast Tubes".  You will learn more than you ever wanted to know about ballastubes and all other aspects of our beloved R-390x series.

Drew