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KT88 Pinout
basing pinout

 

KT88 Substitutes
Close or identical CV5220, KT88S, KT88SC
Different rating or performance 6550, CK6550, KT90

Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application.

 

KT88 Ratings
Vh Ih VaMax Vg2Max VhkMax PaMax Pg2Max IkMax Cgk Cak Cga
6.3 1.6 800 600 200 42 8 230 16.0 12.0 1.2

 

KT88 Application Data
Class Va Vg2 Vg1 Ia Ig2 Rk Zout Pout THD Notes
AB1 521 300 2x64 2x1.7 2x460 9000 50 3.0 B+ = 560V
AB1 552 300 -34.0 2x60 2x1.7 4500 100 2.5
AB1 U/L 40% 553 -75.0 2x50 4500 100 2.0
AB1 U/L 40% 453 -59.0 2x50 4000 70 2.0
AB1 U/L 40% 436 2x87 2x600 6000 50 1.5 B+ = 500V
AB1 U/L 40% 328 2x87 2x400 5000 30 1.0 B+ = 375V
AB1 triode 349 2x79 2x525 4000 17 1.5 B+ = 400V
AB1 triode 422 2x94 2x525 4000 31 1.5 B+ = 485V

 

KT88 Data sheet links
Automatica KT88: html
Dave Cigna''s Pages (DuncanAmps mirror) KT88: html
National Valve Museum KT88: html
Penta Laboratories KT88S: Acrobat PDF
Frank Philipse KT88: 084/k/KT88.pdf, 086/k/KT88.pdf
Triode Electronics KT88: GEC1, GEC2, GEC3, Genelex1, Genelex2, Genelex3, Genelex4, Genelex5, Genelex6, Genelex7, Genelex8
TubeZone KT88: pdf
Virtual Valve Museum KT88: HTML page

 

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