Vacuum Tube - KT88, JJ Electronics, Blue Glass

JJ Electronics
Vacuum Tube - KT88, JJ Electronics, Blue Glass image 1
Customer image:<br/>"Installed in Cary amplifier"
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Vacuum Tube - KT88, JJ Electronics, Blue Glass image 1
Customer Images:
Customer image: "Installed in Cary amplifier"

Vacuum Tube - KT88, JJ Electronics, Blue Glass

Starting at: $44.95
Product Options
  • Apex Matched Quad
  • Apex Matched Sextet
are currently out of stock and will be placed on backorder. This product has substitutes available! Check them out.
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Blue glass envelope.

The JJ Electronic KT88 is a sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT88 delivers a powerful 42 Watts with plenty of headroom to spare. This tube has a tone that is warm and lively with a detailed and balance response. The JJ KT88 is an excellent choice for Hi-Fi stereo equipment as well as guitar amplifiers. It can be used in place of 6550 tubes.

Apex Tube Matching
Matched versions of this tube use Apex Matching
RoHS Compliant
Item ID:
JJ Electronics, Apex Matched
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Apex Matched PairT-KT88-BL-JJ-MP609722123198
Apex Matched QuadT-KT88-BL-JJ-MQ609722123204
Apex Matched SextetT-KT88-BL-JJ-MS609722123211
Product Measurements
Body Height110 mm
Cathode current (Ik)230 mA max
Filament current (If)1.6 A
Filament voltage (Uf)6.3 V
Gain (μ)8
Grid 1 voltage (Ug1)-15 V typical
Grid 2 current (Ig2)7 mA max
Grid 2 dissipation (Wg2)8 W
Grid 2 voltage (Ug2)250 V typical, 600 V max
Grid capacitance (cg1)16.5 pF
Grid to plate capacitance (cg1-a)2.3 pF
Internal resistance (Ri)12 kΩ
Item Diameter52 mm
Item Height125 mm
Plate (anode) capacitance (ca)10 pF
Plate (anode) current (Ia)140 mA
Plate (anode) dissipation (Wa)42 W max
Plate (anode) voltage (Ua)250 V typical, 800 V max
Transconductance (s)11.5 mA/V
Packaging Information
Packaging DimensionsApex Matched Pair version5.3 in. × 4.5 in. × 2.3 in.
Apex Matched Quad version5.3 in. × 4.5 in. × 4.5 in.
Apex Matched Sextet version6.8 in. × 5.3 in. × 4.5 in.
Single version2.1 in. × 2.3 in. × 5.4 in.
Weight (Packaging)Apex Matched Pair version0.54 lbs.
Apex Matched Quad version1.08 lbs.
Apex Matched Sextet version1.62 lbs.
Single version0.27 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet (504.71 KB)Specification Sheet

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Product Reviews

5.00 out of 5 based on 1 reviews
Kevin Joy - November 5th, 2018

Good product and price.

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