Vacuum Tube - KT90, Electro-Harmonix
Electro-Harmonix KT90 power tube. Made in Russia.
Absolutely the best KT90 ever developed. Wafer base height of 0.34”.
Single or Matched | Our Part Number | UPC/EAN |
---|---|---|
Single | T-KT90-EH | 841358102639 |
Matched Pair | T-KT90-EH-MP | 841358102646 |
Matched Quad | T-KT90-EH-MQ | 841358102653 |
Cathode Current (Ik) | 230 mA | ||
Cathode to Heater Voltage | 300 V | ||
Grid 1 Voltage | ≥ -200 V | ||
Grid 2 Current | 14 mA | ||
Grid 2 Dissipation | 8 W | ||
Grid 2 Voltage | ≤ 650 V | ||
Heater Current | 1.6 A | ||
Heater Voltage | 6.0 V - 6.5 V | ||
Item Diameter | 39 mm | ||
Item Height | 125 mm | ||
Non-linear Harmonic Distortion | 14 % | ||
Output Power (POut) | 12.0 W | ||
Plate Current (Ia) | 140 mA | ||
Plate Dissipation (Wa) | 46 W | ||
Plate Voltage (Ua) | ≤ 850 V | ||
Transconductance (S) | 12 mA/V |
Packaging Dimensions | Matched Pair version | T-KT90-EH-MP | 5.51 in. × 4.24 in. × 2.08 in. |
Matched Quad version | T-KT90-EH-MQ | 5.51 in. × 4.24 in. × 4.24 in. | |
Single version | T-KT90-EH | 5.5 in. × 2.25 in. × 2.25 in. | |
Weight (Packaging) | Matched Pair version | T-KT90-EH-MP | 0.3919 lbs. |
Matched Quad version | T-KT90-EH-MQ | 0.7839 lbs. | |
Single version | T-KT90-EH | 0.2072 lbs. |
T-KT90-EH-MP - Matched Pair version | Cathode Current (Ik) | 230 mA |
Cathode to Heater Voltage | 300 V | |
Grid 1 Voltage | ≥ -200 V | |
Grid 2 Current | 14 mA | |
Grid 2 Dissipation | 8 W | |
Grid 2 Voltage | ≤ 650 V | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Item Diameter | 39 mm | |
Item Height | 125 mm | |
Non-linear Harmonic Distortion | 14 % | |
Output Power (POut) | 12.0 W | |
Plate Current (Ia) | 140 mA | |
Plate Dissipation (Wa) | 46 W | |
Plate Voltage (Ua) | ≤ 850 V | |
Transconductance (S) | 12 mA/V | |
T-KT90-EH-MQ - Matched Quad version | Cathode Current (Ik) | 230 mA |
Cathode to Heater Voltage | 300 V | |
Grid 1 Voltage | ≥ -200 V | |
Grid 2 Current | 14 mA | |
Grid 2 Dissipation | 8 W | |
Grid 2 Voltage | ≤ 650 V | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Item Diameter | 39 mm | |
Item Height | 125 mm | |
Non-linear Harmonic Distortion | 14 % | |
Output Power (POut) | 12.0 W | |
Plate Current (Ia) | 140 mA | |
Plate Dissipation (Wa) | 46 W | |
Plate Voltage (Ua) | ≤ 850 V | |
Transconductance (S) | 12 mA/V | |
T-KT90-EH - Single version | Cathode Current (Ik) | 230 mA |
Cathode to Heater Voltage | 300 V | |
Grid 1 Voltage | ≥ -200 V | |
Grid 2 Current | 14 mA | |
Grid 2 Dissipation | 8 W | |
Grid 2 Voltage | ≤ 650 V | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Item Diameter | 39 mm | |
Item Height | 125 mm | |
Non-linear Harmonic Distortion | 14 % | |
Output Power (POut) | 12.0 W | |
Plate Current (Ia) | 140 mA | |
Plate Dissipation (Wa) | 46 W | |
Plate Voltage (Ua) | ≤ 850 V | |
Transconductance (S) | 12 mA/V |
Specification Sheet | All Models |
My Project Lists
Specifications, Files, and Documents
Questions? Contact us at [email protected], or give us a call at 480-820-5411
Product Reviews
Bought a pair of these to run in my ampeg vt22 head used for bass guitar.
Running two tubes at into 2 ohm load
I chose them intitially because of the narrow base to fit the 6l6 bear trap retainers.
Well I was disappointed in the ampeg
,Too linear and "polite" put the tung-sol 6l6gc str back in.
BUT ,decided to try them in my Sunn 100s clone ran in ultralinear.
Biased at 50ma. That amp has always been too boomy.
These kt90s are Perfect for this circuit! Very rich, and articulate through entire range.
Very happy with them.