Purchase EFvacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to help upgrade your tube audio amplifier and preamp. See reviews of this audio vacuum tube also known as 6267.
The EFis a high transconductance sharp cutoff pentode vacuum tube with Noval (B9A) base for audio-frequency applications. Tube EF or Röhre EFID201 Vacuum Pentode, Noval, B9A and Audio Frequency shown. The Svetlana EFis a version of a small pentode which was popular in Europe for use in hi-fi equipment from 1952 . The EFis the standard early stage audio pre-amplifier valve.
The thin glass tube envelope is mm in diameter and excluding the B9A base pins, is mm . Can anyone explain what the differences are in an amp that uses EFtubes in the pre-amp as opposed to using 12AXpre-amp tubes? EFtube neededberichtendec 2016EFbeing discontinued? EFtube questions and other ramblings.