Vacuum Tube - KT88, Electro-Harmonix

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Vacuum Tube - KT88, Electro-Harmonix

Starting at: $35.95
In stock

Electro-Harmonix KT88 Vacuum Tube High power kinkless-tetrode for use in amplifiers such as the Marshall Major. This tube is a favorite of audiophiles. Can be used in place of 6550 for a more "round" bass signature.

RoHS Compliant
Item ID:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-KT88-EH-MP609722128445
Matched QuadT-KT88-EH-MQ609722128452
Matched SextetT-KT88-EH-MS609722128469
Product Measurements
Amplitude of Input Voltage16.5 V
Capacitance, Transfer1.1 pF
Capacitance, input18.5 pF
Capacitance, output12.5 pF
Cathode to Heater Voltage, Negative200 V
Cathode to Heater Voltage, Positive300 V
Filament Voltage (Uf)6.3 V
Grid 1 Voltage16.5 V
Grid 2 Current5 mA
Grid 2 Voltage225 V
Heater Current1.6 A
Item Diameter52 mm
Item Height125 mm
Load Resistance3 kΩ
Non-linear Harmonic Distortion13.5%
Output Power (POut)20 W
Plate Current (Ia)90 mA
Plate Voltage (Ua)400 V
Transconductance (S)9.5 mA/V
Packaging Information
Packaging DimensionsMatched Pair version5.5 in. × 4.3 in. × 2.2 in.
Matched Quad version5.5 in. × 4.3 in. × 4.3 in.
Matched Sextet version6.5 in. × 5.5 in. × 4.3 in.
Single version2.1 in. × 2.1 in. × 5.8 in.
Weight (Packaging)Matched Pair version0.46 lbs.
Matched Quad version0.92 lbs.
Matched Sextet version1.38 lbs.
Single version0.23 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet1.22 MB

Questions and Answers

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Asked by Anonymous on May 31st, 2017.
Matt H
May 31st, 2017
Yes, Electro Harmonix tube are made in Russia.

Product Reviews

5.00 out of 5 based on 1 reviews
- October 5th, 2011
5 out of 5

These are good souding,super reliable KT88's. Do they sound as good as 1968 vintage British made audiophile tubes? no. but if you also compare how much your paying, these sound more than good enough to come out ahead in that comparison.So there, Electroharmonix KT88 tubes are actually even better than MOV's.

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