Top News! Gold discovered in US tubes!
Came across a fascinating document about the GE 5 Star tube program. From a cursory reading these tubes were developed to be the ultimate in reliability for the airline industry, and yes, they feature gold (or silver) grids! (page 16) Here is the reference from the early 50's:
BTW, this document shows you all the tube parts with excellent pictures and explanations.
So now my question:
I am looking to buy the GE 6AU6 tubes that are top rated on this forum. Do you think that the military version GE 6AU6WA is a better choice? In addition, there are GE 5 Star 6AU6WA tubes available as well. Would they be even better sound wise?