Thread: Motorola 19CK1
View Single Post
  #25  
Old 01-13-2013, 01:49 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
  
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,607
The most likely cause of filament failure in this tube is air. When you apply AC to the filaments if the tube is a leaker all three filaments will burn out.
Reply With Quote
Audiokarma