Vacuum Tube - KT90, Electro-Harmonix

Electro-Harmonix
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Vacuum Tube - KT90, Electro-Harmonix

Starting at: $49.95
In Stock

Electro-Harmonix KT90 power tube. Made in Russia.

Absolutely the best KT90 ever developed. Wafer base height of 0.34”.

SKU:
T-KT90-EH
Item ID:
039550
Brand:
Electro-Harmonix
Type:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
SingleT-KT90-EH841358102639
Matched PairT-KT90-EH-MP841358102646
Matched QuadT-KT90-EH-MQ841358102653
Product Measurements by Type
Cathode Current (Ik)230 mA
Cathode to Heater Voltage300 V
Grid 1 Voltage≥ -200 V
Grid 2 Current14 mA
Grid 2 Dissipation8 W
Grid 2 Voltage≤ 650 V
Heater Current1.6 A
Heater Voltage6.0 V - 6.5 V
Item Diameter39 mm
Item Height125 mm
Non-linear Harmonic Distortion14 %
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 Information
Packaging DimensionsMatched Pair versionT-KT90-EH-MP5.51 in. × 4.24 in. × 2.08 in.
Matched Quad versionT-KT90-EH-MQ5.51 in. × 4.24 in. × 4.24 in.
Single versionT-KT90-EH5.5 in. × 2.25 in. × 2.25 in.
Weight (Packaging)Matched Pair versionT-KT90-EH-MP1.596 lbs.
Matched Quad versionT-KT90-EH-MQ3.192 lbs.
Single versionT-KT90-EH0.202 lbs.
Product Measurements by Item
T-KT90-EH-MP - Matched Pair versionCathode Current (Ik)230 mA
Cathode to Heater Voltage300 V
Grid 1 Voltage≥ -200 V
Grid 2 Current14 mA
Grid 2 Dissipation8 W
Grid 2 Voltage≤ 650 V
Heater Current1.6 A
Heater Voltage6.0 V - 6.5 V
Item Diameter39 mm
Item Height125 mm
Non-linear Harmonic Distortion14 %
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 versionCathode Current (Ik)230 mA
Cathode to Heater Voltage300 V
Grid 1 Voltage≥ -200 V
Grid 2 Current14 mA
Grid 2 Dissipation8 W
Grid 2 Voltage≤ 650 V
Heater Current1.6 A
Heater Voltage6.0 V - 6.5 V
Item Diameter39 mm
Item Height125 mm
Non-linear Harmonic Distortion14 %
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 versionCathode Current (Ik)230 mA
Cathode to Heater Voltage300 V
Grid 1 Voltage≥ -200 V
Grid 2 Current14 mA
Grid 2 Dissipation8 W
Grid 2 Voltage≤ 650 V
Heater Current1.6 A
Heater Voltage6.0 V - 6.5 V
Item Diameter39 mm
Item Height125 mm
Non-linear Harmonic Distortion14 %
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

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet1.29 MB

Questions and Answers

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Asked by Anonymous on April 9th, 2017.
Matt H
April 14th, 2017
The Electro Harmonix KT90 is similar in sound to an EL34. These are compatible with the KT88 but you will need a rebias to safely swap them.

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