KT90
Tetrode · IHT · Octal · 1990
“Enhanced KT88.”
Beam power tetrode rated at 50W for high-power output stages
Datasheet ↗SPICE
TRANSCONDUCTANCE0mA/V
GAIN0%
POWER100%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The KT90 is a indirectly-heated beam tetrode from Ei·JJ, introduced around 1990. Commonly used in power (pp) applications. Enhanced KT88.
APPLICATIONS
High-power output
Generic tetrode power (pp) stage
• PA/public address
VS KT88
Pd +43%Full comparison →
HISTORY
Introduced1990ManufacturerEi·JJEquivalentsKT88
ModernSPECIFICATIONS
Heater Voltage6.3V
Heater Current1.6A
Max Plate Voltage800V
Max Power50W
Sensitivity12 mA/V
Gain Factor—
Internal Impedance—
PinoutOctal
Era1990
RarityModerate