Vacuum Tube - KT88, JJ Electronics

Vacuum Tube - KT88, JJ Electronics

JJ Electronics
Vacuum Tube - KT88, JJ Electronics image 1
Vacuum Tube - KT88, JJ Electronics image 2
Customer image:<br/>"My Dynakit Mark III getting new J/J KT88s and a general check over."
Customer image:<br/>"JJ Electronics KT88 in Willsenton R8"
Customer image:<br/>""
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Vacuum Tube - KT88, JJ Electronics image 1Vacuum Tube - KT88, JJ Electronics image 2
Customer Images:
Customer image: "My Dynakit Mark III getting new J/J KT88s and a general check over."Customer image: "JJ Electronics KT88 in Willsenton R8"Customer image: ""
Starting at: $59.95
In Stock

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
SKU:
T-KT88-JJ
Item ID:
004876
Brand:
JJ Electronics, Apex Matched
Type:
RoHS Compliant
Part Numbers
Single or MatchedOur Part NumberUPC/EANJJ Electronics Part Number
Apex Matched PairT-KT88-JJ-MP609722123235
Apex Matched QuadT-KT88-JJ-MQ609722123242
Apex Matched SextetT-KT88-JJ-MS609722123259
SingleT-KT88-JJ609722123228 KT88
Body Height110 mm
Cathode Current (Ik)≤ 230 mA
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
Grid 2 dissipation (Wg2)8 W
Grid 2 voltage (Ug2)≤ 600 V, 250 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)2.3 pF
Internal Resistance (Ri)12 kΩ
Item Diameter52 mm
Item Height125 mm
Plate Capacitance (ca)10 pF
Plate Current (Ia)140 mA
Plate Dissipation (Wa)≤ 42 W
Plate Voltage (Ua)≤ 800 V, 250 V typical
Transconductance (S)11.5 mA/V
Packaging Information
Packaging DimensionsApex Matched Pair versionT-KT88-JJ-MP5.3 in. × 4.5 in. × 2.3 in.
Apex Matched Quad versionT-KT88-JJ-MQ5.3 in. × 4.5 in. × 4.5 in.
Apex Matched Sextet versionT-KT88-JJ-MS6.8 in. × 5.3 in. × 4.5 in.
Single versionT-KT88-JJ2.3 in. × 2.3 in. × 5.1 in.
Weight (Packaging)Apex Matched Pair versionT-KT88-JJ-MP0.5512 lbs.
Apex Matched Quad versionT-KT88-JJ-MQ1.1024 lbs.
Apex Matched Sextet versionT-KT88-JJ-MS1.6536 lbs.
Single versionT-KT88-JJ0.2756 lbs.
T-KT88-JJ-MP - Apex Matched Pair versionBody Height110 mm
Cathode Current (Ik)≤ 230 mA
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
Grid 2 dissipation (Wg2)8 W
Grid 2 voltage (Ug2)≤ 600 V, 250 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)2.3 pF
Internal Resistance (Ri)12 kΩ
Item Diameter52 mm
Item Height125 mm
Plate Capacitance (ca)10 pF
Plate Current (Ia)140 mA
Plate Dissipation (Wa)≤ 42 W
Plate Voltage (Ua)≤ 800 V, 250 V typical
Transconductance (S)11.5 mA/V
T-KT88-JJ-MQ - Apex Matched Quad versionBody Height110 mm
Cathode Current (Ik)≤ 230 mA
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
Grid 2 dissipation (Wg2)8 W
Grid 2 voltage (Ug2)≤ 600 V, 250 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)2.3 pF
Internal Resistance (Ri)12 kΩ
Item Diameter52 mm
Item Height125 mm
Plate Capacitance (ca)10 pF
Plate Current (Ia)140 mA
Plate Dissipation (Wa)≤ 42 W
Plate Voltage (Ua)≤ 800 V, 250 V typical
Transconductance (S)11.5 mA/V
T-KT88-JJ-MS - Apex Matched Sextet versionBody Height110 mm
Cathode Current (Ik)≤ 230 mA
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
Grid 2 dissipation (Wg2)8 W
Grid 2 voltage (Ug2)≤ 600 V, 250 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)2.3 pF
Internal Resistance (Ri)12 kΩ
Item Diameter52 mm
Item Height125 mm
Plate Capacitance (ca)10 pF
Plate Current (Ia)140 mA
Plate Dissipation (Wa)≤ 42 W
Plate Voltage (Ua)≤ 800 V, 250 V typical
Transconductance (S)11.5 mA/V
T-KT88-JJ - Single versionBody Height110 mm
Cathode Current (Ik)≤ 230 mA
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
Grid 2 dissipation (Wg2)8 W
Grid 2 voltage (Ug2)≤ 600 V, 250 V typical
Grid capacitance (cg1)16.5 pF
Grid to Plate Capacitance (ca/g)2.3 pF
Internal Resistance (Ri)12 kΩ
Item Diameter52 mm
Item Height125 mm
Plate Capacitance (ca)10 pF
Plate Current (Ia)140 mA
Plate Dissipation (Wa)≤ 42 W
Plate Voltage (Ua)≤ 800 V, 250 V typical
Transconductance (S)11.5 mA/V

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet504.71 KB
Questions? Contact us at [email protected], or give us a call at 480-820-5411

Product Reviews

4.75 out of 5 based on 16 reviews
tutor turtle - June 4th, 2024
5 out of 5

Great value for the money.

ieales - April 20th, 2023
5 out of 5

The balance of the pair of Apex Matched JJ KT-88 quad is superb. I have my own custom valve tester https://ielogical.com/assets/Lab/ValveTester/index.php The quad match is the best ever measured.

Almost the Holy Grail of more E V E R Y T H I N G !!
Better detail, dynamics, 'slam', air, focus, presence, depth, sound stage.

Combined with JJ 12AY7 driver and JJ ECC802 S / 12AU7 Long Plate, the system has been never better.

polymorphorism - February 13th, 2023
3 out of 5

It took two matched sets to get one that wasn't noisy. Had to return the first set - customer service was tremendous but the noisy set made me think twice about JJs again. The price is good, though.

S.T. - February 12th, 2023
5 out of 5

This is really a great tube at this price range. Apex matched quad, shipped immediately, arrived on time, well-packaged as is the standard from Antique Electronic Supply. Biased properly right off the bat and kept the bias which tells me they were properly burned in. The tubes are heavier than the Tung-Sol 6550 they are replacing if that means anything. I thought I had a great tube in the Tung-Sols but the JJs sound fuller across the whole audio spectrum without colorations. I’ve only had them for a couple of days now so I can’t really say much about longevity but overall impressed with the build quality and sonically how musical they sound. I noticed some loss of authority in the lower frequencies but only in very specific cases of music with continuous, low frequency passages. And then it might have had more to do with my speakers than anything else. Overall a well-made, well-balanced, clear and musical tube.

Jmo80onic.net - September 22nd, 2022
5 out of 5

Robust build handles plenty of current. Ordered matching which worked out well. Working well in a stereo hifi power amp.

Paul Mahanna - June 3rd, 2021
5 out of 5

I inserted them in the sockets of my Sunn 200S adjusted the bias and the amp is alive.

Shawn Vallejos - February 26th, 2021
4 out of 5

Brought a much warmer sound to the entire frequency range in my Willsenton R8. A must have upgrade to this amplifier. Great value from a great vendor that appreciates their customers and is focused on customer service. Thanks.

MikeRR - May 15th, 2020
5 out of 5

I've been using J/J tubes since they first became available. I use them in my own gear and the gear I service. Only 2 tubes had to be replaced in all that time. They work well and can take the abuse of guitar amplifiers on the road.

Jung Kim - December 29th, 2019
5 out of 5

Quick delivery and great tubes.
Thank you.

Leslie 122 Owner - May 3rd, 2019
5 out of 5

These are great tubes for my Leslie 122. Great sound, nice drive. Works as a modern replacement for these amps.

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.