KT90

The KT90 is a vacuum tube used in audio applications. Typically, it is used in hi-fi or electric guitar amplifier applications. KT90 was developed by Elektronska Industrija Niš (Ei). KT90 is designed by Blagomir Bukumira,a leading engineer at Ei

Features

The KT90, or in full, "Kinkless Tetrode 90", is a beam power tetrode and features the same octal socket as its smaller variant, the KT88. It may therefore be used as a substitute, given appropriate re-biasing when used in push-pull configuration.[1]

The KT90 is currently manufactured by Electro-Harmonix, who claim that, despite its different construction, it possesses similar sound characteristics to the EL34 valve.[2] Semi-formal research has been conducted by U.K. supplier Watford Valves who have published a test report.[3] (This research is described here as "semi-formal" because it consists primarily of listening evaluations which may be subjective, rather than electrical analyses of performance parameters in either numerical or graphical form.)

gollark: Some of them are just weird for reasons other than that, though.
gollark: 4703 somehow *does things* just because the law says it can, even though the law is just a human concept and only affects what humans do.
gollark: Really, one of the main things which makes (some) SCPs weird is that they take convenient abstractions/concepts and turn them into immutable physical laws, while our real universe just runs on... well, physics. 173 is affected by line of sight, even though this is just a thing humans do to reason about... looking at things. 005 is just a magic item which unlocks things, 048 is just a label we assign to things which somehow affects them.
gollark: Alternatively, the machine breaks, if it prefers simple changes - so I guess make it STUPIDLY redundant.
gollark: * didn't happen

References
See also: List of vacuum tubes
  1. "TDSL Tube data [KT90]". Duncanamps.com. 2010-02-28. Retrieved 2011-09-08.
  2. "KT90 – Power Vacuum Tube". Electro-Harmonix. Retrieved 2012-07-25.
  3. http://www.watfordvalves.com/cgi-bin/documents/testreport_42.pdf
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