Thread: B&K 1077B questions
View Single Post
  #8  
Old 02-19-2021, 01:54 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
  
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 15,468
12AT7 is a dual triode.
No grid = diode.
Single grid=triode.
Dual grid= tetrode
Triple grid = penthode or beam power tube.
There were octodes...IIRC they were converter stages for superheterodynes.
__________________
Tom C.

Zenith: The quality stays in EVEN after the name falls off!
What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
Reply With Quote