Monthly Archives: February 2012

Metal Vacuum Tubes

Posted on February 7, 2012 by Administrator

I will never forget the first time I saw metal tubes; it was a pair of 6L6’s in a Bogen amplifier from the early 1950’s. Metal tubes were introduced by RCA in a Technical Bulletin in 1935. The first metals … Continue reading →

Posted in Uncategorized | Leave a comment