KT88 Tubes For Sale: KT88 Data Sheet, Tube Specs, & Substitute Info
KT88 tubes for sale
We offer single or multiple KT88 tubes for sale in matched configurations to suit a wide range of audio replacement needs and amplifier builds.
KT88 matched pair
KT88 matched trio
KT88 matched quad
Each KT88 tube for sale from Pentalabs is selected for dependable performance in demanding audio environments, including hi-fi systems and guitar amplifiers. Whether you need one replacement tube or a larger matched set, we can help you source the right quantity for your application. If you are comparing brands, constructions, or operating requirements, we can also help identify a suitable KT88 tube equivalent based on your amplifier’s design, bias requirements, and output stage configuration.
KT88 tube specs
The KT88 is a classic tetrode vacuum tube used in many HiFi and guitar applications. It is commonly found in output stages where a KT88 amp is designed for strong headroom, solid bass response, and reliable power handling. Below are general specifications for reference. Full operating data, curves, and additional details should be confirmed on the data sheet for the specific tube version being used.
Below are general specifications. Please refer to the downloadable datasheet for complete details.
| Specification | Details |
|---|---|
| Tube Type | Beam power tetrode |
| Base | Octal, 8-pin |
| Heater Voltage | 6.3 V |
| Heater Current | 1.6 A |
| Maximum Plate Voltage | 800 V |
| Maximum Screen Voltage | 600 V |
| Plate Dissipation | 42 W |
| Screen Dissipation | Up to 8 W |
| Cooling | Natural air / convection |
KT88 data sheet download
Download the KT88 data sheet to review electrical characteristics, pinout, limiting values, and typical operating conditions for KT88 amplifier design, servicing, and replacement planning.
KT88 vacuum tube substitute & equivalent information
The KT88 is widely used in hi-fi and instrument amplification, and in many cases it can serve as a replacement for current-production and reissue versions from major audio tube brands. Common brand-reference searches include Linlai, PSVANE, Mullard, Shuguang, TAD, KR Audio, and Marshall KT88 replacement requests. It may also be used in amplifiers from brands such as Blackstar, Cayin, and Music Angel where the amp is designed around KT88 operation. In some amplifiers, KT90, KT120, and KT150 tubes are also considered acceptable substitutes, but this is never universal and should always be confirmed against the amplifier’s bias range, current draw, physical clearance, and manufacturer guidance before installation.
If you need help choosing between replacement options, contact Pentalabs. As experienced vacuum tube manufacturers, we can help you compare KT88 options from our range of HiFi tubes and guitar amp tubes for sale.
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