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| KT88S Pinout |
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| KT88S Substitutes |
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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. |
| KT88S 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 |
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| KT88S Application Data |
| Class |
Va |
Vg2 |
Vg1 |
Ia |
Ig2 |
Ra |
S |
Rk |
Zout |
Pout |
THD |
Notes |
| A |
400 |
225 |
-16.5 |
87.0 |
4.0 |
|
|
|
3,000 |
20.0 |
|
|
| A |
250 |
250 |
-14.0 |
140 |
12.0 |
15,000 |
11.0 |
|
1,500 |
12.5 |
|
|
| 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 |
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| KT88S Data sheet links |
| Dave Cigna''s Pages (DuncanAmps mirror) |
6550: html |
| Peter Millett |
6550: Acrobat PDF 100K |
| National Valve Museum |
KT88: html |
| Frank Philipse (Wildcat mirror - Jörg Jan Münter) |
KT88: KT88.pdf (236209 bytes), KT88.pdf (434345 bytes), KT88.pdf (633155 bytes), KT88spec.pdf (70096 bytes), KT88_GEC.pdf (9774126 bytes) 6550: 6201.pdf (902849 bytes), 6550.pdf (135652 bytes), 6550.pdf (421187 bytes) KT90: KT90.pdf (67175 bytes) |
| Triode Electronics |
KT88: GEC1, GEC2, GEC3, Genelex1, Genelex2, Genelex3, Genelex4, Genelex5, Genelex6, Genelex7, Genelex8 KT90: gif1, gif2 |
| TubeZone |
KT88: pdf |
Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Please see the substitutes at the top of the page for more details |
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