Thread: 6BK4 versus 6BK4A
View Single Post
  #3  
Old 05-09-2006, 12:45 PM
blue_lateral's Avatar
blue_lateral blue_lateral is offline
...
  
Join Date: Mar 2005
Location: Washington State
Posts: 530
I think it was the 6bk4c that had the heavy leaded glass. AFAIK they are all interchangeable, but later tubes are probably more reliable.

John
Reply With Quote